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Model AMP01
May 2007Rev. A00
Contents
1About Your System
Other Information You May Need . . . . . . . . . . . . . . . . . . . . . . . . . 7
Indicators on the Enclosure Bezel
Front-Panel Indicators and Features
Drive Carrier LED Indicators
Back-Panel Indicators and Features
Enclosure Management Module (EMM)
Enclosure Failover When Two EMMs are Installed
EMM Thermal Shutdown
The enclosure provides a 3-U rack-mounted external storage chassis capable of accommodating up
to 15 3.0-Gbps, Serial-Attached SCSI (SAS) drives or 3.0-Gbps Serial ATA (SATA) drives. The
enclosure can be daisy-chained with up to two additional enclosures to provide up to 45 drives per
host connection. Host-based RAID configuration is supported via a Dell
RAID Controller (PERC) 5/E.
Other Information You May Need
™
PowerEdge™ Expandable
CAUTION: The
information may be included within this document or as a separate document.
•The
•The
•The
•CDs included with your
•Documentation for any components you purchased separately provides information to configure
•RAID controller documentation.
•Updates are sometimes included with the
•Release notes or readme files may be included to provide last-minute updates to the
Rack Installation Guide
describes how to install your
Getting Started Guide
and technical specifications.
Dell OpenManage Server Administrator
your storage solution using the Storage Management Service within Server Administrator.
NOTE: Online configuration, enclosure status, and active event notification require Server
Administrator version 4.5.1 or later.
managing your
and install these options.
software, and/or documentation.
NOTE: Always check for updates on support.dell.com and read the updates first because they often
supersede information in other documents.
documentation, or provide advanced technical reference material intended for experienced users.
Product Information Guide
or
Rack Installation Instructions
enclosure
provides an overview of
enclosure
enclosure
.
provide documentation and tools for configuring and
provides important safety and regulatory information. Warranty
included with your rack solution
into a rack.
enclosure
documentation provides information on managing
enclosure
to describe changes to the
features, setting up your
enclosure
enclosure
,
enclosure
or
,
About Your System7
Indicators on the Enclosure Bezel
An optional locking bezel can be installed on the front of the enclosure to limit access.
Figure 1-1
illustrates the indicators and components on the bezel. Table 1-1 lists conditions indicated by the lights on
the bezel.
For information on installing and removing the bezel, see "Removing and Replacing the Front
Bezel."
Figure 1-1. LEDs on the Front Bezel
1
2
3
Table 1-1. Front Bezel Indicators
Item LED IndicatorLED IconCondition
1Split mode (green)When lit, indicates the enclosure is in split mode;
otherwise, the enclosure is in unified mode. For more
information on both modes, see “Unified Mode and Split
Mode.”
2Power (green)When lit, at least one power supply is supplying power to
the enclosure.
3Enclosure status
(blue/amber)
Steady amber: Power is on and enclosure is in reset state
Steady blue: Power is on and enclosure status is OK.
Flashing blue: Host server is identifying the enclosure.
Flashing amber: Enclosure is in fault state.
8About Your System
Front-Panel Indicators and Features
Figure 1-2 shows the LED indicators and components on the
enclosure
’s front panel (optional locking bezel
not shown). Table 1-2 lists the conditions and functions indicated by each.
Figure 1-2. Front-Panel Features
2
1
4
5
3
6
1enclosure status LED4power LED7drives (15)
2drive activity LED5split mode LED
3drive status LED6enclosure mode switch
Table 1-2. Front-Panel Components
ComponentIconCondition
Enclosure status LED
(blue/amber)
Steady amber: Power is on and enclosure is in reset state
Steady blue: Power is on and enclosure status is OK.
Flashing blue: Host server is identifying the enclosure.
Flashing amber: Enclosure is in fault state.
7
About Your System9
Table 1-2. Front-Panel Components
ComponentIconCondition
Power LED (green)When lit, at least one power supply is supplying power to
Split mode LED (green)When lit, indicates the enclosure is in split-mode
Enclosure mode switchWhen set in its uppermost position at power on, the
(continued)
the enclosure.
configuration; otherwise, the enclosure is in unified mode.
For more information, see “Unified Mode and Split
Mode.”
enclosure is configured in unified mode; when set in its
lowermost position at power on, the enclosure is
configured in split mode.
NOTE: This switch must be set prior to power on. Changing
the switch setting after power on will have no effect on
enclosure configuration until the system is power cycled.
Drive Carrier LED Indicators
Each drive carrier in your enclosure has two LEDs: an activity LED (green) and a bi-color (green/amber)
status LED (see Figure 1-3). The activity LED flashes whenever the drive is accessed. Table 1-3 lists the
flash patterns for the status LED.
Figure 1-3. Drive Carrier LED Indicators
10About Your System
1
1activity LED 2status LED
2
Table 1-3. Drive Carrier Status LEDs
LED Description
OffSlot empty, drive not yet discovered by server, or an
unsupported drive is present
Steady greenDrive is online
Green flashing (250 milliseconds
[ms])
Green flashing
On 400 ms
Off 100 ms
Amber flashing (125 ms)Drive failed
Green/amber flashing
Green On 500 ms
Amber On 500 ms
Off 1000 ms
Green/amber flashing
Green On 3000 ms
Off 3000 ms
Amber On 3000 ms
Off 3000 ms
Drive is being identified or is being prepared for removal
Drive rebuilding
Predicted failure reported by drive
Drive being spun down by user request or other nonfailure
condition
Back-Panel Indicators and Features
Figure 1-4 shows the back-panel features of a fully populated enclosure containing both enclosure
management modules (EMMs) and two power supply/cooling fan modules. The enclosure requires at
least one EMM to be installed; if only one EMM is installed, it must reside in the primary (left, as seen
from rear of enclosure) EMM bay. Both power supply/cooling fan modules must be installed. However,
the enclosure can run temporarily on one power supply/cooling fan module. For more information, see
"Power Supply and Cooling Fan Features."
About Your System11
Figure 1-4. Back-Panel Features
1
3
1primary EMM2secondary EMM3power supply/cooling fan
2
modules (2)
Enclosure Management Module (EMM)
Each EMM provides data path and enclosure management functions for your enclosure, including:
•Monitoring and controlling enclosure environment elements (temperature, fans, power supplies, and
enclosure LEDs)
•Controlling access to the drives
•Communicating
enclosure
attributes and states to the host server
NOTE: At least one EMM must be installed in the enclosure. If only one EMM is installed, it must be in the
primary EMM bay (see Figure 1-4) and a blank module cover must be installed in the secondary EMM bay
(see "Installing an EMM Module Cover in an Empty Bay").
Figure 1-5 shows a single EMM as it appears from the rear of the enclosure. The EMM connects to the
enclosure via the enclosure midplane (see "Removing and Installing an EMM"). EMM connectors and
components are shown in Figure 1-5 and include:
•Debug port (Dell use only)
•SAS port connector (In)
•SAS port connector (Out)
•Three LEDs (In Port Link, Out Port Link, and EMM Status)
12About Your System
For a description of each component on the front panel of the EMM, see Table 1-4. For an explanation of
how to connect the enclosure using the EMM ports, see "Operating Your Storage Enclosure."
Figure 1-5. EMM External Panel
1
Table 1-4. EMM Component Functions
Item ComponentIconFunction
1Debug PortDell factory use only.
2SAS Port (In)InProvide SAS connection for cabling to host or next
3In Port Link Status
LED (green/amber)
4SAS Port (Out)OutProvide SAS connection for cabling to the next
23456
upchain expansion enclosure (unified mode only).
Green: All links into the port are connected.
Amber: One or more links into the port are not
connected.
Off: Interface is not active.
downchain expansion enclosure in a daisy chain
(unified mode only).
NOTE: The SAS Out port is disabled if the enclosure
is running split mode. For more information, see
"Operating Your Storage Enclosure."
5Out Port Link
Status LED
(green/amber)
Green: All links out of the port are connected.
Amber: One or more links out of the port are not
connected.
Off: Interface is not active.
About Your System13
Table 1-4. EMM Component Functions
Item ComponentIconFunction
6EMM Status LED
(green/amber)
(continued)
Solid green: EMM is functioning properly.
Solid amber: The enclosure did not boot or was not
properly configured.
Off: EMM did not boot, is not properly configured,
or communication between the EMM and the
server is lost.
Green flashing (250 ms): Firmware download in
progress.
Amber flashing (On 250 ms Off 250 ms [once];
Off 1000 ms): Communication between SAS
expanders and enclosure processor could not be
established.
Amber flashing (On 250 ms Off 250 ms [twice];
Off 1000 ms): Enclosure processor unable to
communicate with enclosure devices.
Amber flashing (On 250 ms Off 250 ms [three
times]; Off 1000 ms): One or more SAS expanders
not properly configured.
Amber flashing (On 250 ms Off 250 ms [five
times]; Off 1000 ms): Firmware revisions between
EMMs are different. Both EMM LEDs will blink.
Unified Mode and Split Mode
The enclosure can run in one of two modes:
•Unified
•Split
In unified mode, a SAS host can communicate with up to 15 drives in the enclosure via a single EMM, or
up to 45 drives in three enclosures daisy chained together. In split mode, the enclosure is split into two
virtual groups, with up to eight consecutive drives (slots 7-14) controlled by the primary (left) EMM. The
remaining drives (slots 0-6) are controlled by the secondary (right) EMM. You must select either mode
using the enclosure mode switch on the front panel of the enclosure before powering on (see Figure 1-7).
NOTE: Clustering is not supported in the MD1000 host-based RAID solution.
Figure 1-6 illustrates the division of control, depending on whether you select the enclosure to run in
either unified or split mode.
14About Your System
Figure 1-6. Drive Slot Distribution in Split Mode vs. Unified Mode
NOTE: To change the enclosure mode, you must change the position of the enclosure mode switch before turning
on power to the enclosure. Changing the position of the switch while the enclosure is on will not affect enclosure
operation until the enclosure is rebooted.
For a complete description of the roles of the primary and secondary EMMs, see "Operating Your Storage
Enclosure."
Enclosure Failover When Two EMMs are Installed
If two EMMs are installed, a certain degree of failover is offered. Control and monitoring of the enclosure
elements can be transferred from one EMM to another in the event of an EMM failure. A failover occurs
whenever communication is lost between an EMM and its peer.
In the event of a peer EMM failure, the surviving EMM activates the amber status LED of the failed
EMM and holds it in reset. The surviving EMM then takes over the responsibility of enclosure
management, which includes monitoring and control of the audible alarm, enclosure LEDs, power
supplies, and fans.
Failover does not include providing connectivity to the drives controlled by the failed EMM. When a
failed EMM is replaced, enclosure management functions do not automatically return to the replaced
EMM unless an additional failure occurs that triggers another failover event.
16About Your System
EMM Thermal Shutdown
If critical internal temperatures are reached, the enclosure will be shut down automatically via either a
thermal shutdown command issued by the EMM firmware or via a command from Server Administrator.
Power Supply and Cooling Fan Features
Your storage enclosure supports two integrated, hot-pluggable power supply/cooling fan modules. Each
module contains two separate cooling fans. Both modules must be installed to ensure proper cooling.
The enclosure requires at least three of the cooling fans to operate to avoid overheating.
CAUTION: A power supply/cooling fan module can be removed from a powered-on enclosure; however, the
enclosure will shut down if overheating occurs.
A power supply/cooling fan module can be replaced without powering down the enclosure. For
information on removing and replacing the modules, see "Removing and Installing the Power
Supply/Cooling Fan Module."
Figure 1-8 shows the power supply/cooling fan module features and LED indicators. Table 1-5 lists the
LED indicator descriptions.
Figure 1-8. Power Supply and Cooling Fan Module LED Features and Indicators
23
1
5
1DC power LED3AC power LED5AC power connector
2Power supply/cooling fan fault
LED
4cooling fans (2)6on/off switch
4
6
About Your System17
Table 1-5. Power Supply/Cooling Fan Module LED Indicators
LED typeLED colorLED IconFunction
DC power GreenOn: DC output voltages are within
specifications.
Off: No power, or voltages not within
specifications.
Power
supply/cooling fan
fault
AC powerGreenOn: AC input voltage is within
AmberOn: DC output voltages are not within
specifications or one (or both) fans are
in fault.
Off: No fault condition is present.
specifications.
Off: No power, or voltages not within
specifications.
Enclosure Alarms
An audible alarm is activated if any of the fault conditions listed in Table 1-6 occur. If a critical event
occurs, the alarm sounds continuously. If a noncritical event occurs, the alarm sounds every 10 seconds.
NOTE: The audible alarm is disabled by default. To enable the alarm, you must change the default setting in Server
Administrator. For more information, see Server Administrator Storage Management Service documentation.
Table 1-6. Critical and Noncritical Events
Critical EventsNoncritical Events
Two or more fan blowers have failed or a power
supply/cooling fan module is not installed.
One or more temperature sensors are in critical range. One cooling fan has failed.
NOTE: It is rare for both EMMs to fail simultaneously. However, if this occurs, the enclosure cannot issue critical
or noncritical event alarms for any enclosure component.
One power supply has failed.
One or more temperature sensors are in warning range.
One EMM has failed.
18About Your System
Operating Your Storage Enclosure
This section provides procedures for connecting your storage enclosure to a host system for either
unified or split mode.
Before You Begin
2
Before connecting your storage
•The components that came with your storage
–Power cord
–SAS interconnect cables
–
Documentation
–Rail kit
•Any relevant documentation, including:
–Getting Started Guide
–
Rack Installation Guide
–
Product Information Guide
–
Installation and Server Management
–Server Administrator documentation
–Readme files
CD
enclosure
or
, ensure that the following are available:
enclosure
Rack Installation Instructions
(for important safety, regulatory, and warranty information)
CD (version 4.5.1 or later)
, including:
Cabling Your Enclosure for Unified or Split Mode
How you cable your
or split mode.
•A unified configuration is one in which your
server with a controller card). In unified mode, your
daisy-chained to a single port on the controller card in your host server. See Figure 2-1 for a cabling
diagram of a unified mode configuration.
enclosure
to your host controller depends on the configuration you choose: unified
enclosure
is connected to one host (for example, a
enclosure
can be one of up to three enclosures
Operating Your Storage Enclosure19
•A split-mode configuration is one in which your storage
enclosure
is connected to either two host
controllers, or two ports on a single host controller. In this configuration, the drives are split into two
groups with eight drives controlled by one host controller and seven drives controlled by the other host
controller. See Figure 2-1 for a cabling diagram of a split mode configuration.
NOTE: Daisy-chaining storage enclosures is not supported in split mode.
NOTE: Clustering is not supported in the MD1000 host-based RAID solution.
Selection of the configuration mode is done via the enclosure mode switch on the front enclosure panel
(see Figure 1-7).
NOTE: The enclosure mode switch must be set to the mode you want to use before the enclosure is powered on.
Changing the configuration selection after the enclosure is powered on has no effect on enclosure operation until
it is rebooted.
Connecting the Enclosure
1
Confirm that the latest version of Server Administrator is installed. For installation instructions and
supported operating systems, see your Server Administrator documentation.
2
Turn off the host system and all attached devices.
3
Connect the external SAS cable(s) to the EMM SAS connector on the storage
Figure 1-5 and Figure 2-1) and to the RAID controller on the host system. (See your RAID controller
documentation to ensure that the controller is properly installed.)
•If you are configuring your enclosure in unified mode, connect the external SAS cable from the
host controller to the In port on the EMM module of the first
Figure 2-1). Attach subsequent storage
upchain storage
enclosure
. The last enclosure in the chain will not have a connecting cable in its
enclosure
s in the daisy chain to the Out port on the first
enclosure
Out EMM port.
•If you are configuring your enclosure in split mode, attach the external SAS cable from the first
host controller to the In port on the primary EMM module and the SAS cable from the second
host controller or port to the In port on the secondary EMM (see Figure 2-1). In this
configuration, the server attached to the In port on the primary EMM will control eight drives
(slots 7 through 14); the server or controller port attached to the In port on the secondary EMM
will control seven drives (slots 0 through 6).
enclosure
(see
in the daisy chain (see
NOTE: In split mode, you can cable the enclosure to operate in either a two-host or single-host configuration.
See Figure 2-1. In single-host configuration, you can cable both EMMs to either the same host controller, or to
a separate host controller.
20Operating Your Storage Enclosure
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