HP ProLiant ML370 Generation 4 Reference and Troubleshooting Guide

HP ProLiant ML370 Generation 4 Server

Reference and Troubleshooting Guide

May 2005 (Second Edition)

Part Number 346896-002

© Copyright 2004, 2005 Hewlett-Packard Development Company, L.P.

The information contained herein is subject to change without notice. The only warranties for HP products and services are set forth in the express limited warranty statements accompanying such products and services. Nothing herein should be construed as constituting an additional warranty. HP shall not be liable for technical or editorial errors or omissions contained herein.

Microsoft, Windows, and Windows NT are US registered trademarks of Microsoft Corporation.

Linux is a U.S. registered trademark of Linus Torvalds.

HP ProLiant ML370 Generation 4 Server Reference and Troubleshooting Guide

May 2005 (Second Edition)

Part Number 346896-002

Audience assumptions

This document is for the person who installs, administers, and troubleshoots servers and storage systems. HP assumes you are qualified in the servicing of computer equipment and trained in recognizing hazards in products with hazardous energy levels.

	3
Contents
Server component identification	9
Front panel components .......................................................................................................................	9
Front panel LEDs and buttons............................................................................................................	10
Rear panel components ......................................................................................................................	12
Rear panel LEDs and buttons.............................................................................................................	13
System board components .................................................................................................................	14
System maintenance switch....................................................................................................	15
DIMM slots.............................................................................................................................	17
System board LEDs ...........................................................................................................................	18
Power supply backplane LED............................................................................................................	19
System LEDs and internal health LED combinations........................................................................	19
SCSI IDs and SAS-SATA device numbers........................................................................................	21
SCSI configurations ...........................................................................................................................	22
Hot-plug SCSI hard drive LEDs ........................................................................................................	22
Hot-plug SCSI hard drive LED combinations ...................................................................................	23
SATA or SAS hard drive LEDs .........................................................................................................	24
SAS and SATA hard drive LED combinations..................................................................................	25
Identifying redundant hot-plug fans...................................................................................................	26
Server operations	27
Powering up the server.......................................................................................................................	27
Powering down the server..................................................................................................................	27
Extending the server from the rack ....................................................................................................	28
Unlocking the front tower bezel.........................................................................................................	29
Removing the access panel ................................................................................................................	30
Server setup	31
Optional installation services .............................................................................................................	31
Rack planning resources ....................................................................................................................	32
Optimum environment .......................................................................................................................	33
Space and airflow requirements..............................................................................................	33
Temperature requirements ......................................................................................................	34
Power requirements ................................................................................................................	35
Electrical grounding requirements..........................................................................................	36
Rack warnings and cautions...............................................................................................................	36
Identifying rack server shipping carton contents ...............................................................................	39
Identifying tower server shipping carton contents .............................................................................	39

4 HP ProLiant ML370 Generation 4 Server Reference and Troubleshooting Guide

Installing hardware options ................................................................................................................	40
Setting up a tower server....................................................................................................................	40
Installing the server into the rack .......................................................................................................	42
Powering up and configuring the server ............................................................................................	50
Installing the operating system...........................................................................................................	50
Registering the server.........................................................................................................................	51
Hardware options installation	53
Introduction........................................................................................................................................	53
Processor options ...............................................................................................................................	54
Memory options .................................................................................................................................	58
Online spare memory configuration .......................................................................................	58
DIMM installation guidelines.................................................................................................	59
Installing DIMMs ...................................................................................................................	59
Hot-plug SCSI hard drive options......................................................................................................	60
Removing a hot-plug SCSI hard drive....................................................................................	60
Installing a hot-plug SCSI hard drive .....................................................................................	61
SAS-SATA hard drive cage...............................................................................................................	62
Removing the hard drive cage ................................................................................................	62
Installing the SAS-SATA hard drive cage..............................................................................	64
Removable media devices..................................................................................................................	67
Accessing the removable media cage .....................................................................................	68
Installing a half-height or full-height media device................................................................	70
Installing an optional internal two-bay hot-plug SCSI drive cage..........................................	73
Redundant hot-plug fans ....................................................................................................................	75
Redundant hot-plug fan cage option.......................................................................................	76
Installing hot-plug fans ...........................................................................................................	78
Replacing hot-plug fans..........................................................................................................	80
Redundant hot-plug power supply .....................................................................................................	80
Expansion boards ...............................................................................................................................	82
Performance balancing ...........................................................................................................	83
Removing the expansion slot cover ........................................................................................	83
Installing expansion boards ....................................................................................................	84
Remote Insight Lights-Out Edition II board ......................................................................................	86
VHDCI or HD68 SCSI cable option ..................................................................................................	87
Duplex SCSI board option .................................................................................................................	89
Tower-to-rack conversion option.......................................................................................................	90
Converting a tower server to a rack server .............................................................................	90
Installing the rack server.........................................................................................................	97
Accessing the server in the rack .............................................................................................	97
Server cabling	99
Storage device cabling guidelines......................................................................................................	99
Hot-plug SCSI cabling .......................................................................................................................	99

Contents	5
Integrated simplex SCSI cabling ..........................................................................................	100
Integrated duplex SCSI cabling ............................................................................................	101
Array controller simplex SCSI cabling.................................................................................	102
Array controller duplex SCSI cabling ..................................................................................	102
Integrated SCSI cabling with optional internal two-bay hot-plug SCSI drive cage..............	104
Array controller SCSI cabling with optional internal two-bay hot-plug SCSI drive cage....	105
Cable connector identification .........................................................................................................	106
CD-ROM drive cabling....................................................................................................................	107
RILOE II cabling .............................................................................................................................	107
Diskette drive cabling ......................................................................................................................	108
External storage cabling...................................................................................................................	109
Server configuration and utilities	111
Configuration tools ..........................................................................................................................	111
SmartStart software ..............................................................................................................	111
HP ROM-Based Setup Utility ..............................................................................................	113
Array Configuration Utility ..................................................................................................	115
Option ROM configuration for arrays ..................................................................................	115
Option ROM configuration for arrays ..................................................................................	116
Auto-configuration process ..................................................................................................	117
HP ProLiant Essentials Rapid Deployment Pack .................................................................	118
Re-entering the server serial number and product ID ...........................................................	118
Management tools............................................................................................................................	119
Automatic server recovery....................................................................................................	119
ROMPaq utility.....................................................................................................................	119
System Online ROM flash component utility.......................................................................	120
Integrated Lights-Out technology.........................................................................................	120
StorageWorks library and tape tools.....................................................................................	122
Management agents ..............................................................................................................	122
HP Systems Insight Manager................................................................................................	123
Redundant ROM support......................................................................................................	123
USB support .........................................................................................................................	124
Diagnostic tools ...............................................................................................................................	125
Survey Utility .......................................................................................................................	125
Array Diagnostic Utility .......................................................................................................	126
HP Insight Diagnostics .........................................................................................................	126
Integrated management log...................................................................................................	126
Keeping the system current..............................................................................................................	127
Drivers ..................................................................................................................................	127
Resource Paqs.......................................................................................................................	128
ProLiant Support Packs ........................................................................................................	128
ActiveUpdate ........................................................................................................................	128
Operating system version support.........................................................................................	128

6 HP ProLiant ML370 Generation 4 Server Reference and Troubleshooting Guide

Change control and proactive notification............................................................................	129
Natural language search assistant .........................................................................................	129
Care Pack..............................................................................................................................	129
Troubleshooting	131
Server diagnostic steps.....................................................................................................................	131
Important safety information ................................................................................................	131
Preparing the server for diagnosis ........................................................................................	135
Symptom information...........................................................................................................	136
Diagnostic steps....................................................................................................................	137
Procedures for all ProLiant servers ..................................................................................................	151
Hardware problems...............................................................................................................	151
Software problems................................................................................................................	177
Contacting HP.......................................................................................................................	186
Error messages .................................................................................................................................	192
ADU error messages.............................................................................................................	192
POST error messages and beep codes ..................................................................................	225
Event list error messages ......................................................................................................	278
HP BladeSystem infrastructure error codes..........................................................................	283
Battery replacement	293
Regulatory compliance notices	295
Regulatory compliance identification numbers................................................................................	295
Federal Communications Commission notice..................................................................................	296
FCC rating label....................................................................................................................	296
Class A equipment................................................................................................................	296
Class B equipment ................................................................................................................	297
Declaration of conformity for products marked with the FCC logo, United States only .................	297
Modifications ...................................................................................................................................	298
Cables...............................................................................................................................................	298
Mouse compliance statement ...........................................................................................................	298
Canadian notice (Avis Canadien).....................................................................................................	298
European Union Notice....................................................................................................................	299
Japanese notice.................................................................................................................................	300
BSMI notice .....................................................................................................................................	300
Laser compliance .............................................................................................................................	300
Battery replacement notice...............................................................................................................	301
Taiwan battery recycling notice .......................................................................................................	302
Power cord statement for Japan .......................................................................................................	302
Electrostatic discharge	303
Preventing electrostatic discharge....................................................................................................	303
Grounding methods to prevent electrostatic discharge ....................................................................	304

Contents 7

Server specifications	305
Server specifications ........................................................................................................................	305
Environmental specifications ...........................................................................................................	305
Technical support	307
Related documents ...........................................................................................................................	307
HP contact information ....................................................................................................................	307
Before you contact HP .....................................................................................................................	308
Customer self repair .........................................................................................................................	308
Acronyms and abbreviations	309
Index	313

	9
Server component identification
In this section
Front panel components..................................................................................................................	9
Front panel LEDs and buttons ......................................................................................................	10
Rear panel components.................................................................................................................	12
Rear panel LEDs and buttons .......................................................................................................	13
System board components ............................................................................................................	14
System board LEDs ......................................................................................................................	18
Power supply backplane LED ......................................................................................................	19
System LEDs and internal health LED combinations ..................................................................	19
SCSI IDs and SAS-SATA device numbers ..................................................................................	21
Hot-plug SCSI hard drive LEDs...................................................................................................	22
Hot-plug SCSI hard drive LED combinations..............................................................................	23
SATA or SAS hard drive LEDs ...................................................................................................	24
SAS and SATA hard drive LED combinations ............................................................................	25
Identifying redundant hot-plug fans .............................................................................................	26

Front panel components

10 HP ProLiant ML370 Generation 4 Server Reference and Troubleshooting Guide

Item	Description
1	UID switch and LED
2	Internal system health LED
3	Front panel USB port
4	External system health LED
5	NIC link/activity LED
6	Power on/Standby button/LED assembly
7	Diskette drive*
8	Removable media bays
9	Hot-plug SCSI hard drive bays (SCSI IDs 0 through 5)
10	Optional SAS-SATA hard drive bays (1 through 8)

* Open the media door on the rack server to access the diskette drive.

Front panel LEDs and buttons

			Server component identification	11
	Item	Description	Status
	1	UID switch and LED	Blue = Activated
			Flashing blue = System being managed remotely
			Off = Deactivated
	2	Internal system health	Green = Normal (system on)
		LED	Amber = System health is degraded
			Red = System health is critical
			Off = Normal (system off)
	3	External system health	Green = Normal (system on)
		(power supply) LED	Amber = Redundant power supply failure
			Red = Power supply failure. No operational power supplies.
			Off = Normal (system off)
	4	NIC link/activity LED	Green = Linked to network
		(embedded NIC only)	Flashing green = Linked with activity on the network
			Off = No network connection
	5	Power on/Standby button	Amber = System has AC power and is in standby mode
		and LED	Green = System has AC power and is turned on
			Off = System has no AC power

12 HP ProLiant ML370 Generation 4 Server Reference and Troubleshooting Guide

Rear panel components

Item	Description	Item	Description
1	x4 PCI Express expansion slots	9	Auxillary VHDCI SCSI blank
2	100-MHz PCI-X expansion slots	10	Mouse connector
3	Unit ID LED	11	Keyboard connector
4	Ethernet 10/100/1000 port	12	Serial connector B
5	iLO management port	13	Serial connector A
6	Parallel connector	14	USB connectors
7	Video connector	15	Primary hot-plug power supply
8	T-15 Torx screwdriver	16	Redundant hot-plug power supply

Server component identification

13

Rear panel LEDs and buttons

Item	Description	LED Color	Status
1	Unit ID LED	Blue	On = Activated
			Flashing = System remotely managed
			Off = Deactivated
2	NIC Activity LED	Green	On or flashing = Linked to network
	(Integrated NC7781)		Off = Not linked to network
3	NIC Link LED	Green	On = Network activity
	(Integrated NC7781)		Off = No network activity
4	iLO NIC Activity LED	Green	On or flashing = Network activity
			Off = No network activity
5	iLO NIC Link LED	Green	On = Linked to network
			Off = Not linked to network

14 HP ProLiant ML370 Generation 4 Server Reference and Troubleshooting Guide

Item	Description	LED Color	Status
6	Power supply LED	Green	On = Power turned on and power supply
	(redundant)		functioning properly
			Off = One or more of the following conditions
			exists:
			•	AC power unavailable
			•	Power supply failed
			• Power supply in standby mode
			• Power supply exceeded current limit
7	Power Supply LED	Green	On = Power turned on and power supply
	(primary)		functioning properly
			Off = One or more of the following conditions
			exists:
			•	AC power unavailable
			•	Power supply failed
			• Power supply in standby mode
			• Power supply exceeded current limit

System board components

			Server component identification			15
	Item	Description	Item	Description
	1	Redundant fan 2 connector	13	Power supply connector
	2	System maintenance switch	14	SCSI port 1
	3	System battery	15	PPM socket 2
	4	Redundant fan 4 connector	16	PPM socket 1 (populated)
	5	64-bit/100-MHz PCI-X slot,	17	SCSI port 2
		bus 3
	6	64-bit/100-MHz PCI-X slot,	18	Fan cable connector
		bus 3
	7	64-bit/100-MHz PCI-X slot,	19	Diskette drive connector
		bus 7
	8	64-bit/100-MHz PCI-X slot,	20	IDE connector
		bus 7
	9	PCI Express x4 slot, bus	21	DIMM slots
		11 *
	10	PCI Express x4 slot, bus	22	Processor 1
		14 *
	11	RILOE II connector (install	23	Processor 2
		adapter into slot 1) **
	12	Power supply signal
		connector

*x8 PCI Express cards are supported, but will run at x4 speeds.

**The server comes with iLO remote management capability embedded on the system board. The 30-pin remote management connector for the RILOE II board is provided if the server environment requires an upgrade for improved Remote Console performance.

System maintenance switch

The system maintenance switch (SW1) is a six-position switch that is used for system configuration. The default position for all six positions is Off.

16 HP ProLiant ML370 Generation 4 Server Reference and Troubleshooting Guide

Position	Description	Function
S1	iLO Security	Off = iLO security is enabled
		On = iLO security is disabled
S2	Configuration	Off = System configuration can
	lock	be changed
		On = System configuration is
		locked
S3	Reserved	Reserved
S4	Reserved	Reserved
S5	Password	Off = No function
	protection	On = Clears power-on
	override
		password and administrator
		password
S6	Invalidate	Off = Normal
	configuration	On = ROM treats system
		configuration as invalid

When the system maintenance switch position 6 is set to the On position, the system is prepared to erase all system configuration settings from both CMOS and NVRAM.

CAUTION: Clearing CMOS and/or NVRAM deletes configuration information. Be sure to properly configure the server or data loss could occur.

Server component identification

17

DIMM slots

DIMM slots are numbered sequentially (1 through 8) and the paired banks are identified by the letters A, B, C, and D.

Item Description

1DIMM slot 1A

2DIMM slot 2A

3DIMM slot 3B

4DIMM slot 4B

5DIMM slot 5C

6DIMM slot 6C

7DIMM slot 7D

8DIMM slot 8D

18 HP ProLiant ML370 Generation 4 Server Reference and Troubleshooting Guide

System board LEDs

Item	LED Description	Status
1	Processor error	Off = Normal
		Amber = Processor failed or missing
2	System temperature	Off = Normal
	alert	Amber = System temperature has exceeded
		OS cautionary level
3	PPM error	Off = Normal
		Amber = PPM failed or missing
4	Memory mode LED	Off = Normal
		Green = System is in online spare memory
		mode
5	Online spare memory	Off = Normal
	failover LED	Amber = Online spare memory is in use due
		to memory failover
6	Memory status	Off = Normal
		Amber = Memory failed or configuration
		problem

Server component identification

19

Power supply backplane LED

If the power supply backplane LED is illuminated, then the power supply backplane must be replaced.

System LEDs and internal health LED combinations

When the internal health LED on the front panel illuminates either amber or red, the server is experiencing a health event. Combinations of illuminated system LEDs and the internal health LED indicate system status.

NOTE: The system management driver must be installed in order for the internal health LED to provide pre-failure and warranty conditions.

The front panel health LEDs indicate only the current hardware status. In some situations, HP SIM may report server status differently than the health LEDs because the software tracks more system attributes.

20 HP ProLiant ML370 Generation 4 Server Reference and Troubleshooting Guide

System LED and	Internal Health	Status
Color	LED Color
Processor failure,	Red	One or more of the following conditions may exist:
socket X (Amber)		• Processor in socket X has failed.
		• Processor X is not installed in the socket.
		• ROM detected a failed processor during POST.
	Amber	Processor in socket X is in a pre-failure condition.
PPM failure, slot X	Red	• PPM in slot X has failed.
(Amber)		• PPM is not installed in slot X, but the corresponding
		processor is installed.
DIMM failure, slot X	Red	• DIMM in slot X has failed.
(Amber)		• DIMM has experienced a multi-bit error.
	Amber	• DIMM in slot X has reached single-bit correctable
		error threshold.
		• DIMM in slot X is in a pre-failure condition.
DIMM bank error (all	Red	The bank is not populated entirely or DIMMs do not all
slots in one bank,		match within the bank.
Amber)
DIMM failure (all	Red	• No valid or usable memory is installed in the system.
slots, Amber)		• The banks are not populated in the correct order.
System temperature	Red	System temperature has exceeded OS cautionary level
alert (Amber)		or critical hardware level.
Fan (Amber)	Red	A required fan has failed.
	Amber	A redundant fan has failed.
Power supply	Red	The power supply backplane has failed.
backplane failure
(Amber)

Server component identification

21

SCSI IDs and SAS-SATA device numbers

The server supports singleor dual-channel SCSI hard drive configurations. The single-channel configuration (simplex) supports up to six hard drives on SCSI channel 1. The dual-channel configuration (duplex) supports two hard drives on SCSI channel 2 (SCSI IDs 4 and 5), and up to four hard drives on SCSI channel 1 (SCSI IDs 0 through 3).

The server supports a combination of up to eight SAS and SATA hard drives in the optional SAS-SATA hard drive cage. SAS-SATA devices are numbered 1 through 8.

The SCSI IDs for both simplex and duplex configurations, as well as SAS-SATA device numbers, are illustrated. HP recommends populating hard drive bays starting with the lowest SCSI ID or device number.

Item	Description
1	SCSI hard drive cage (SCSI IDs 0
	through 5)
2	SAS-SATA hard drive cage (Device
	numbers 1 through 8)

22 HP ProLiant ML370 Generation 4 Server Reference and Troubleshooting Guide

SCSI configurations

NOTE: These SCSI ID designations apply regardless of the controller or the configuration used.

NOTE: The standard cabling configuration for the server is simplex. Duplex is an option requiring the duplex kit. Refer to "Server Cabling (on page 99)" for cabling information.

Configuration	Channel 1	Channel 2
Simplex	SCSI IDs 0, 1, 2, 3,	Unused
	4, 5
Duplex	SCSI IDs 0, 1, 2, 3	SCSI IDs 4, 5

IMPORTANT: After changing any SCSI configuration, be sure the proper boot controller order is set in RBSU.

Hot-plug SCSI hard drive LEDs

Item	LED Description	Status
1	Activity status	On = Drive activity
		Flashing = High activity on the drive or drive
		is being configured as part of an array.
		Off = No drive activity

							Server component identification		23
			Item		LED Description		Status
			2		Online status		On = Drive is part of an array and is
							currently working.
							Flashing = Drive is actively online.
							Off = Drive is offline.
			3		Fault status		On = Drive failure
							Flashing = Fault-process activity
							Off = No fault-process activity
Hot-plug SCSI hard drive LED combinations
	Activity	Online		Fault LED		Interpretation
	LED (1)	LED (2)		(3)
	On, off, or	On or off		Flashing		A predictive failure alert has been received for this drive.
	flashing					Replace the drive as soon as possible.
	On, off, or	On		Off		The drive is online and is configured as part of an array.
	flashing					If the array is configured for fault tolerance and all other drives in the
						array are online, and a predictive failure alert is received or a drive
						capacity upgrade is in progress, you may replace the drive online.
	On or	Flashing		Off		Do not remove the drive. Removing a drive may terminate the
	flashing					current operation and cause data loss.
						The drive is rebuilding or undergoing capacity expansion.
	On	Off		Off		Do not remove the drive.
						The drive is being accessed, but (1) it is not configured as part of an
						array; (2) it is a replacement drive and rebuild has not yet started; or
						(3) it is spinning up during the POST sequence.
	Flashing	Flashing		Flashing		Do not remove the drive. Removing a drive may cause data loss
						in non-fault-tolerant configurations.
						Either (1) the drive is part of an array being selected by an array
						configuration utility; (2) Drive Identification has been selected in
						HP SIM; or (3) drive firmware is being updated.
	Off	Off		On		The drive has failed and has been placed offline.
						You may replace the drive.

24 HP ProLiant ML370 Generation 4 Server Reference and Troubleshooting Guide

Activity	Online	Fault LED	Interpretation
LED (1)	LED (2)	(3)
Off	Off	Off	Either (1) the drive is not configured as part of an array; (2) the drive
			is configured as part of an array, but it is a replacement drive that is
			not being accessed or being rebuilt yet; or (3) the drive is configured
			as an online spare.
			If the drive is connected to an array controller, you may replace the
			drive online.

SATA or SAS hard drive LEDs

Item	LED Description	Status
1	Online/Activity status	Green = Drive activity
		Flashing green = High activity on the
		drive or drive is being configured as part
		of an array
		Off = No drive activity
2	Fault/UID status	Amber = Drive failure
		Flashing amber = Fault-process activity
		Blue = Unit identification is active
		Off = No fault-process activity

Server component identification

25

SAS and SATA hard drive LED combinations

Online/Activity	Fault/UID LED	Interpretation
LED (green)	(amber/blue)
On, off, or	Alternating amber	The drive has failed, or a predictive failure alert has been
flashing	and blue	received for this drive; it also has been selected by a
		management application.
On, off, or	Steadily blue	The drive is operating normally, and it has been selected by a
flashing		management application.
On	Amber, flashing	A predictive failure alert has been received for this drive.
	regularly (1 Hz)	Replace the drive as soon as possible.
On	Off	The drive is online, but it is not active currently.
Flashing	Amber, flashing	Do not remove the drive. Removing a drive may terminate
regularly (1 Hz)	regularly (1 Hz)	the current operation and cause data loss.
		The drive is part of an array that is undergoing capacity
		expansion or stripe migration, but a predictive failure alert has
		been received for this drive. To minimize the risk of data loss, do
		not replace the drive until the expansion or migration is complete.
Flashing	Off	Do not remove the drive. Removing a drive may terminate
regularly (1 Hz)		the current operation and cause data loss.
		The drive is rebuilding, or it is part of an array that is undergoing
		capacity expansion or stripe migration.
Flashing	Amber, flashing	The drive is active, but a predictive failure alert has been received
irregularly	regularly (1 Hz)	for this drive. Replace the drive as soon as possible.
Flashing	Off	The drive is active, and it is operating normally.
irregularly
Off	Steadily amber	A critical fault condition has been identified for this drive, and the
		controller has placed it offline. Replace the drive as soon as
		possible.
Off	Amber, flashing	A predictive failure alert has been received for this drive. Replace
	regularly (1 Hz)	the drive as soon as possible.
Off	Off	The drive is offline, a spare, or not configured as part of an array.

26 HP ProLiant ML370 Generation 4 Server Reference and Troubleshooting Guide

Identifying redundant hot-plug fans

NOTE: Fan locations are located in the chassis.

Item	Description	Configuration
1	Fan 1	Primary
2	Fan 2	Redundant
3	Fan 3	Primary
4	Fan 4	Redundant
5	Fan 5	Primary
6	Fan 6	Redundant

Fan failures are indicated by amber LEDs located on each hot-plug fan and by the front panel internal health LED. When a fan failure occurs, the internal health LED illuminates red in non-redundant mode and amber in redundant mode.

	27
Server operations
In this section
Powering up the server .................................................................................................................	27
Powering down the server ............................................................................................................	27
Extending the server from the rack...............................................................................................	28
Unlocking the front tower bezel ...................................................................................................	29
Removing the access panel...........................................................................................................	30

Powering up the server

To power up the server, press the Power On/Standby button.

Powering down the server

WARNING: To reduce the risk of personal injury, electric shock, or damage to the equipment, remove the power cord to remove power from the server. The front panel Power On/Standby button does not completely shut off system power. Portions of the power supply and some internal circuitry remain active until AC power is removed.

IMPORTANT: If installing a hot-plug device, it is not necessary to power down the server.

1.Shut down the OS as directed by the OS documentation.

2.Press the Power On/Standby button to place the server in standby mode. When the server enters standby power mode, the system power LED changes to amber.

3.Disconnect the power cords.

The system is now without power.

28 HP ProLiant ML370 Generation 4 Server Reference and Troubleshooting Guide

Extending the server from the rack

1.Loosen the thumbscrews that secure the server faceplate to the front of the rack.

IMPORTANT: If the server is installed in a telco rack, remove the server from the rack to access internal components.

2. Extend the server on the rack rails until the server rail-release latches engage.

WARNING: To reduce the risk of personal injury or equipment damage, be sure that the rack is adequately stabilized before extending a component from the rack.

WARNING: To reduce the risk of personal injury, be careful when pressing the server rail-release latches and sliding the server into the rack. The sliding rails could pinch your fingers.

3.After performing the installation or maintenance procedure, slide the server back into the rack:

a. Press the server rail-release latches and slide the server fully into rack.

b. Secure the server by tightening the thumbscrews.

Server operations

29

Unlocking the front tower bezel

Tower servers have a removable front bezel that must be unlocked and opened before accessing the hard drive cage, and before removing the access panel. The door must remain closed during normal server operations.

Use the key provided with the server to unlock the bezel with a counterclockwise turn.

If necessary, remove the front bezel.

30 HP ProLiant ML370 Generation 4 Server Reference and Troubleshooting Guide

Removing the access panel

WARNING: To reduce the risk of personal injury from hot surfaces, allow the drives and the internal system components to cool before touching them.

CAUTION: Do not operate the server for long periods without the access panel. Operating the server without the access panel results in improper airflow and improper cooling that can lead to thermal damage.

1.Power down the server if performing a non-hot-plug installation or maintenance procedure ("Powering down the server" on page 27).

2.Extend or remove the server from the rack ("Extending the server from the rack" on page 28).

3.Open the front bezel ("Unlocking the front tower bezel" on page 29).

4.Lift up on the hood latch handle and remove the access panel.

After installing hardware options, replace the access panel. Be sure that the panel is locked into place securely before powering up the server.