This document describes initial hardware setup for HP MSA 2040 controller enclosures, and is intended for use by storage system
administrators familiar with servers and computer networks, network administration, storage system installation and configuration,
storage area network management, and relevant protocols.
HP Part Number: 723983-002
Published: September 2013
Edition: 2
Confidential computer software. Valid license from HP required for possession, use or copying. Consistent with FAR 12.211 and 12.212, Commercial
Computer Software, Computer Software Documentation, and Technical Data for Commercial Items are licensed to the U.S. Government under
vendor's standard commercial license.
The information contained herein is subject to change without notice. The only warranties for HP products and services are set forth in the express
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.
Acknowledgments
Microsoft® and Windows® are U.S. registered trademarks of Microsoft Corporation.
UNIX® is a registered trademark of The Open Group.
Warranty
WARRANTY STATEMENT: To obtain a copy of the warranty for this product, see the warranty information website:
HP MSA Storage models are high-performance storage solutions combining outstanding performance with
high reliability, availability, flexibility, and manageability. MSA 2040 enclosure models are designed to
meet NEBS Level 3, MIL-STD-810G (storage requirements), and European Telco specifications.
MSA 2040 Storage models
The MSA 2040 enclosures support either large form factor (LFF 12-disk) or small form factor (SFF 24-disk)
2U chassis, using either AC or DC power supplies. HP MSA Storage models include MSA 2040 SAN and
MSA 2040 SAS controllers, which are introduced below.
NOTE: For additional information about MSA 2040 controller modules, see the following subsections:
• "MSA 2040 SAN controller module—rear panel components" (page 15)
• "MSA 2040 SAS controller module—rear panel components" (page 16)
MSA 2040 SAN
MSA 2040 SAN models use Converged Network Controller technology, allowing you to select the desired
host interface protocol from the available Fibre Channel (FC) or Internet SCSI (iSCSI) host interface
protocols supported by the system. You can use the CLI to set all controller module host ports to use one of
these host interface protocols:
• 16 G b F C
• 8 Gb FC
• 4 Gb FC
• 10 Gb E iSC SI
• 1 GbE iSCSI
Alternatively, you can use the management interfaces to set Converged Network Controller ports to support
a combination of host interface protocols. When configuring a combination of host interface protocols,
host ports 1 and 2 are set to FC (either both16 Gbit/s or both 8 Gbit/s), and host ports 3 and 4 must be
set to iSCSI (either both 10 GbE or both 1 GbE), provided the Converged Network Controller ports use the
qualified SFP connectors and cables required for supporting the selected host interface protocol. See
"MSA 2040 SAN controller module—rear panel LEDs" (page 77) for more information.
IMPORTANT:See the “HP MSA 2040 SAN Storage array and iSCSI SFPs Read This First” document for
important information pertaining to iSCSI SFPs.
TIP:See the “Configuring host ports” topic within the SMU Reference Guide for information about
configuring Converged Network Controller ports with host interface protocols of the same type or a
combination of types.
MSA 2040 SAS
MSA 2040 SAS models provide four high density mini-SAS (HD mini-SAS) ports per controller module. The
HD mini-SAS host interface protocol uses the SFF-8644 external connector interface defined for SAS3.0 to
support a link rate of 12 Gbit/s using the qualified connectors and cable options. See "MSA 2040 SAS
controller module—rear panel LEDs" (page 79) for more information.
MSA 2040 Storage models11
Features and benefits
Product features and supported options are subject to change. Online documentation describes the latest
product and product family characteristics, including currently supported features, options, technical
specifications, configuration data, related optional software, and product warranty information.
NOTE: Check the QuickSpecs for a complete list of supported servers, operating systems, disk drives, and
options. See http://www.hp.com/support/msa2040/QuickSpecs
.
12Overview
2Components
1
32
4
5
6
12345678 9101112131415161718192021222324
Note: Integers on disks indicate drive slot numbering sequence.
1
4
7
10
3
6
9
12
132
4
5
6
1
2
3
4
5
6
7
8
9
10
11
12
Note: Integers on disks indicate drive slot numbering sequence.
Front panel components
HP MSA 2040 models support small form factor (SFF) and large form factor (LFF) enclosures. The SFF
chassis, configured with 24 2.5" SFF disks, is used as a controller enclosure. The LFF chassis, configured
with 12 3.5" LFF disks, is used as either a controller enclosure or a drive enclosure.
Supported drive enclosures, used for adding storage, are available in LFF or SFF chassis. The MSA 2040
6 Gb 3.5" 12-drive enclosure is the large form factor drive enclosure used for storage expansion. The HP
D2700 6 Gb enclosure, configured with 25 2.5" SFF disks, is the small form factor drive enclosure used for
storage expansion. See "SFF drive enclosure" (page 17) for a description of the D2700.
MSA 2040 Array SFF enclosure
Left ear
1 Enclosure ID LED
2 Disk drive Online/Activity LED
3 Disk drive Fault/UID LED
Figure 1 MSA 2040 Array SFF enclosure: front panel
4 Unit Identification (UID) LED
5 Heartbeat LED
6 Fault ID LED
MSA 2040 Array LFF or supported drive expansion enclosure
Left earRight ear
Right ear
1 Enclosure ID LED
2 Disk drive Online/Activity LED
3 Disk drive Fault/UID LED
Figure 2 MSA 2040 Array LFF or supported 12-drive enclosure: front panel
4 Unit Identification (UID) LED
5 Heartbeat LED
6 Fault ID LED
MSA 2040 enclosures support LFF/SFF Midline SAS, LFF/SFF Enterprise SAS, and SFF SSD disks. For
information about creating vdisks and adding spares using these different disk drive types, see the
HP MSA 2040 SMU Reference Guide and HP MSA 2040 Solid State Drive Read This First document.
Controller enclosure—rear panel layout
The diagram and table below display and identify important component items comprising the rear panel
layout of the MSA 2040 controller enclosure (MSA 2040 SAN is shown in the example).
1 AC Power supplies
2 Controller module A (see face plate detail figures)
4 DC Power supply (2) — (DC model only)
5 DC Power switch
3 Controller module B (see face plate detail figures)
Figure 3 MSA 2040 Array: rear panel
A controller enclosure accommodates two power supply FRUs of the same type—either both AC or both
DC—within the two power supply slots (see two instances of callout 1 above). The controller enclosure
accommodates two controller module FRUs of the same type within the I/O module slots (see callouts 2
and 3 above).
IMPORTANT:If the MSA 2040 controller enclosure is configured with a single controller module, the
controller module must be installed in the upper slot (see callout 2 above), and an I/O module blank must
be installed in the lower slot (see callout 3 above). This configuration is required to allow sufficient air flow
through the enclosure during operation.
The diagrams with tables that immediately follow provide descriptions of the different controller modules
and power supply modules that can be installed into the rear panel of an MSA 2040 controller enclosure.
Showing controller modules and power supply modules separately from the enclosure provides improved
clarity in identifying the component items called out in the diagrams and described in the tables.
Descriptions are also provided for optional drive enclosures supported by MSA 2040 controller enclosures
for expanding storage capacity.
NOTE: MSA 2040 controller enclosures support hot-plug replacement of redundant controller modules,
fans, power supplies, and I/O modules. Hot-add of drive enclosures is also supported.
14Components
MSA 2040 SAN controller module—rear panel components
CACHE
CLI
CLI
LINK
ACT
6Gb/s
SERVICE−1SERVICE−2
PORT 1 PORT 2PORT 3 PORT 4
157
34
6
8
2
= FC LEDs
= 10GbE iSCSI LEDs
CACHE
CLI
CLI
LINK
ACT
6Gb/s
SERVICE−1SERVICE−2
PORT 1 PORT 2PORT 3 PORT 4
= 1 Gb iSCSI LEDs (all host ports use 1 Gb RJ-45 SFPs in this figure)
157
34
6
8
2
= FC LEDs
Figure 4 shows host ports configured with either 8/16 Gb FC or 10GbE iSCSI SFPs. The SFPs look
identical.
Refer to the LEDs that apply to the specific configuration of your Converged Network Controller ports.
1 Host ports: used for host connection or replication
[see "Install an SFP transceiver" (page 89)]
2 CLI port (USB - Type B)
3 Service port 2 (used by service personnel only)
4 Reserved for future use
5 Network port
6 Service port 1 (used by service personnel only)
7 Disabled button (used by engineering only)
(Sticker shown covering the opening)
8 SAS expansion port
Figure 4 MSA 2040 SAN controller module face plate (FC or 10GbE iSCSI)
1 Host ports: used for host connection or replication
[see "Install an SFP transceiver" (page 89)]
2 CLI port (USB - Type B)
3 Service port 2 (used by service personnel only)
4 Reserved for future use
Figure 5 MSA 2040 SAN controller module face plate (1 Gb RJ-45)
NOTE: See "MSA 2040 SAN" (page 11) for more information about Converged Network Controller
technology. For port configuration, see the “Configuring host ports” topic within the
HP MSA 2040 SMU Reference Guide or online help.
5 Network port
6 Service port 1 (used by service personnel only)
7 Disabled button (used by engineering only)
(Sticker shown covering the opening)
8 SAS expansion port
Controller enclosure—rear panel layout15
MSA 2040 SAS controller module—rear panel components
CACHE
CLI
CLI
LINK
ACT
6Gb/s
SERVICE−1SERVICE−2
ACT
LINK
12Gb/s
S
S
A
ACT
LINK
SAS 1 SAS 2
ACT
LINK
12Gb/s
S
S
A
ACT
LINK
SAS 3 SAS 4
157
34
6
8
2
00
INOUT
00
INOUT
145716
2
3
Figure 6 shows host ports configured with 12 Gbit/s HD mini-SAS connectors.
1 HD mini-SAS ports: used for host connection
2 CLI port (USB - Type B)
3 Service port 2 (used by service personnel only)
4 Reserved for future use
5 Network port
Figure 6 MSA 2040 SAS controller module face plate (HD mini-SAS)
IMPORTANT:See Connecting to the controller CLI port for information about enabling the controller
enclosure USB Type - B CLI port for accessing the Command-line Interface via a telnet client.
Drive enclosures
Drive enclosure expansion modules attach to MSA 2040 controller modules via the mini-SAS expansion
port, allowing addition of disk drives to the system. MSA 2040 controller enclosures support adding the
6 Gb drive enclosures described below.
LFF drive enclosure — rear panel layout
MSA 2040 controllers support the MSA 2040 6 Gb 3.5" 12-drive enclosure shown below.
6 Service port 1 (used by service personnel only)
7 Disabled button (used by engineering only)
(Sticker shown covering the opening)
8 SAS expansion port
1 Power supplies (AC shown)
2 I/O module A
3 I/O module B
4 Disabled button (used by engineering only)
Figure 7 LFF 12-drive enclosure: rear panel
16Components
5 Service port (used by service personnel only)
6 SAS In port
7 SAS Out port
SFF drive enclosure
Do not remove
Used for cache recovery only
Controller module pictorial
CompactFlash card
(Midplane-facing rear view)
MSA 2040 controllers support the D2700 6 Gb drive enclosure for adding storage. For information about
this product, visit http://www.hp.com/support
provided in the MSA 2040 Quick Start Instructions and MSA 2040 Cable Configuration Guide.
Cache
To enable faster data access from disk storage, the following types of caching are performed:
• Write-back or write-through caching. The controller writes user data in the cache memory on the
module rather than directly to the drives. Later, when the storage system is either idle or aging—and
continuing to receive new I/O data—the controller writes the data to the drive array.
• Read-ahead caching. The controller detects sequential array access, reads ahead into the next
sequence of data, and stores the data in the read-ahead cache. Then, if the next read access is for
cached data, the controller immediately loads the data into the system memory, avoiding the latency of
a disk access.
NOTE: See HP MSA 2040 SMU Reference Guide for more information about volume cache options.
Transportable CompactFlash
During a power loss or array controller failure, data stored in cache is saved off to non-volatile memory
(CompactFlash). The data is then written to disk after the issue is corrected. To protect against writing
incomplete data to disk, the image stored on the CompactFlash is verified before committing to disk.
. Pictorial representations of this drive enclosure are also
The CompactFlash card is located at the midplane-facing end of the controller module as shown below.
Figure 8 MSA 2040 CompactFlash card
In single-controller configurations, if the controller has failed or does not start, and the Cache Status LED is
on or blinking, the CompactFlash will need to be transported to a replacement controller to recover data
not flushed to disk (see "Controller failure in a single-controller configuration" (page 57) for more
information).
Cache17
CAUTION: The CompactFlash card should only be removed for transportable purposes. To preserve the
existing data stored in the CompactFlash, you must transport the CompactFlash from the failed controller to
the replacement controller using a procedure outlined in the HP MSA Controller Module Replacement Instructions shipped with the replacement controller module. Failure to use this procedure will result in the
loss of data stored in the cache module. The CompactFlash must stay with the same enclosure. If the
CompactFlash is used/installed in a different enclosure, data loss/data corruption will occur.
IMPORTANT:In dual controller configurations featuring one healthy partner controller, there is no need to
transport failed controller cache to a replacement controller because the cache is duplicated between the
controllers (subject to volume write optimization setting).
Supercapacitor pack
To protect RAID controller cache in case of power failure, MSA 2040 controllers are equipped with
supercapacitor technology, in conjunction with CompactFlash memory, built into each controller module to
provide extended cache memory backup time. The supercapacitor pack provides energy for backing up
unwritten data in the write cache to the CompactFlash in the event of a power failure. Unwritten data in
CompactFlash memory is automatically committed to disk media when power is restored. While the cache
is being maintained by the supercapacitor, the Cache Status LED flashes at a rate of 1/10 second on and
9/10 second off.
Upgrading to MSA 2040
For information about upgrading components for use with MSA 2040 controllers, refer to: Upgrading to the HP MSA 2040.
18Components
3Installing the enclosures
Installation checklist
The following table outlines the steps required to install the enclosures and initially configure the system. To
ensure a successful installation, perform the tasks in the order they are presented.
Table 1 Installation checklist
StepTaskWhere to find procedure
1.Install the controller enclosure and optional
drive enclosures in the rack, and attach ear
caps.
2.Connect the controller enclosure and LFF/SFF
drive enclosures.
3.Connect power cords.See the quick start instructions.
If using the optional Remote Snap feature, also see
"Connecting two storage systems to replicate volumes"
(page 36).
1
See "Obtaining IP values" (page 43).
See Connecting to the controller CLI port; with Linux and
Windows topics.
Topics below correspond to bullets at left:
See “Getting Started” in the HP MSA 2040 SMU Reference Guide.
See “Configuring the System” and “Provisioning the
System” topics (SMU Reference Guide or online help).
1
MSA Device Discovery Tool, introduced in Obtaining IP values, provides the optimal method for setting network port IP addresses.
2
The SMU is introduced in "Accessing the SMU" (page 49). See the SMU Reference Guide or online help for additional information.
3
If the systems are cabled for replication and licensed to use the Remote Snap feature, you can use the Replication Setup Wizard to
prepare to replicate an existing volume to another vdisk. See the SMU Reference Guide for additional information.
Connecting controller and drive enclosures
MSA 2040 controller enclosures support up to eight enclosures (including the controller enclosure). You
can cable drive enclosures of the same type or of mixed LFF/SFF model type.
The firmware supports both straight-through and fault-tolerant SAS cabling. Fault-tolerant cabling allows
any drive enclosure to fail—or be removed—while maintaining access to other enclosures. Fault tolerance
and performance requirements determine whether to optimize the configuration for high availability or
high performance when cabling. MSA 2040 controller enclosures support 6 Gbit/s internal disk drive
speeds, together with 6 Gbit/s (SAS2.0) expander link speeds. When connecting multiple drive
enclosures, use fault-tolerant cabling to ensure the highest level of fault tolerance.
For example, the illustration on the left in Figure 11 (page 22) shows controller module 1A connected to
expansion module 2A, with a chain of connections cascading down (blue). Controller module 1B is
connected to the lower expansion module (5B) of the last drive enclosure, with connections moving in
the opposite direction (green).
Installation checklist19
Connecting the MSA 2040 controller to the SFF drive enclosure
The SFF D2700 25-drive enclosure, supporting 6 Gb internal disk drive and expander link speeds, can be
attached to an MSA 2040 controller enclosure using supported mini-SAS to mini-SAS cables of 0.5 m
(1.64') to 2 m (6.56') length [see Figure 10 (page 21)].
Connecting the MSA 2040 controller to the LFF drive enclosure
The LFF MSA 2040 6 Gb 3.5"12-drive enclosure, supporting 6 Gb internal disk drive and expander link
speeds, can be attached to an MSA 2040 controller enclosure using supported mini-SAS to mini-SAS
cables of 0.5 m (1.64') to 2 m (6.56') length [see Figure 10 (page 21)].
Connecting the MSA 2040 controller to mixed model drive enclosures
MSA 2040 controllers support cabling of 6 Gb SAS link-rate LFF and SFF expansion modules—in mixed
model fashion—as shown in Figure 13 (page 24), and further described in the HP MSA 2040 Cable Configuration Guide; the HP MSA 2040 Quick Start Instructions;QuickSpecs; and HP white papers (listed
below).
Cable requirements for MSA 2040 enclosures
IMPORTANT:
• When installing SAS cables to expansion modules, use only supported mini-SAS x4 cables with
SFF-8088 connectors supporting your 6 Gb application.
• Mini-SAS to mini-SAS 0.5 m (1.64') cables are used to connect cascaded enclosures in the rack.
• See QuickSpecs for information about which cables are provided with your MSA 2040 products.
http://www.hp.com/support/msa2040/QuickSpecs
• If additional or longer cables are required, they must be ordered separately (see relevant MSA 2040
QuickSpecs or P2000 G3 QuickSpecs for your products).
• The maximum expansion cable length allowed in any configuration is 2 m (6.56').
• Cables required, if not included, must be separately purchased.
• When adding more than two drive enclosures, you may need to purchase additional 1 m or 2 m
cables, depending upon number of enclosures and cabling method used:
• Spanning 3, 4, or 5 drive enclosures requires 1 m (3.28') cables.
• Spanning 6 or 7 drive enclosures requires 2 m (6.56') cables.
• Se
e Quickspecs (link provided above) regarding information about cables supported for host connection:
• Qualified Fibre Channel SFP and cable options
• Qualified 10GbE iSCSI SFP and cable options
• Qualified 1 Gb RJ-45 SFP and cable options
• Qualified HD mini-SAS cable options
For additional information concerning cabling of MSA 2040 controllers and D2700 drive enclosures, visit:
h
ttp://www.hp.com/support/msa2040
Browse for the following reference documents:
• HP MSA 2040 Cable Configuration Guide
• HP Remote Snap technical white paper
• HP MSA 2040 best practices
20Installing the enclosures
NOTE: For clarity, the schematic illustrations of controller and expansion modules shown in this section
InOut
1B
1A
2A
2B
Controller A
IOM blank
P1P2
Controller A
IOM blank
= LFF 12-drive enclosure
= SFF 25-drive enclosure
21
1
2
IOM blank
IOM blank
1B
1A
2A
2B
InOut
1B
1A
2A
2B
Controller A
Controller B
InOut
P1P2
Controller A
Controller B
P1P2
= LFF 12-drive enclosure
= SFF 25-drive enclosure
21
1
2
1B
1A
2A
2B
provide only relevant details such as expansion ports within the module face plate outline. For detailed
illustrations showing all components, see "Controller enclosure—rear panel layout" (page 14).
Figure 9 Cabling connections between the MSA 2040 controller and a single drive enclosure
The figure above shows examples of the MSA 2040 controller enclosure—equipped with a single
controller module—cabled to a single drive enclosure equipped with a single expansion module. The
empty I/O module slot in each of the enclosures is covered with an IOM blank to ensure sufficient air flow
during enclosure operation. The remaining illustrations in the section feature enclosures equipped with dual
IOMs.
IMPORTANT:If the MSA 2040 controller enclosure is configured with a single controller module, the
controller module must be installed in the upper slot, and an I/O module blank must be installed in the
lower slot (shown above). This configuration is required to to allow sufficient air flow through the enclosure
during operation.
Figure 10 Cabling connections between the MSA 2040 controller and a single drive enclosure
Connecting controller and drive enclosures21
Controller A
Controller B
1A
1B
In
Out
2A
2B
3A
3B
4A
4B
5A
5B
In
Out
In
Out
In
Out
In
Out
In
Out
In
Out
Out
In
Fault-tolerant cabling
Controller A
Controller B
1A
1B
In
Out
2A
2B
3A
3B
4A
4B
5A
5B
In
Out
In
Out
In
Out
In
Out
In
Out
In
Out
Out
In
Straight-through cabling
Figure 11 Cabling connections between MSA 2040 controllers and LFF drive enclosures
The diagram at left (above) shows fault-tolerant cabling of a dual-controller enclosure cabled to MSA 2040
6 Gb 3.5" 12-drive enclosures featuring dual-expansion modules. Controller module 1A is connected to
expansion module 2A, with a chain of connections cascading down (blue). Controller module 1B is
connected to the lower expansion module (5B), of the last drive enclosure, with connections moving in the
opposite direction (green). Fault-tolerant cabling allows any drive enclosure to fail—or be removed—while
maintaining access to other enclosures.
The diagram at right (above) shows the same storage components connected using straight-through
cabling. Using this method, if a drive enclosures fails, the enclosures that follow the failed enclosure in the
chain are no longer accessible until the failed enclosure is repaired or replaced.
22Installing the enclosures
P1
Controller A
Controller B
1A
1B
P2P1
P1
P1
P1
P1
P2P1
P2P1
2A
2B
3A
3B
4A
4B
5A
5B
P2
P2
P2
P2
P2
P1
Controller A
Controller B
P2
P1
P1
P2
P1
P2
P1P2
P1P2
1A
1B
2A
2B
3A
3B
4A
4B
5A
5B
Fault-tolerant cablingStraight-through cabling
P1
P2
P1
P2
P2
Figure 12 Cabling connections between MSA 2040 controllers and SFF drive enclosures
The figure above provides sample diagrams reflecting cabling of MSA 2040 controller enclosures and
D2700 6 Gb drive enclosures.
The diagram at left shows fault-tolerant cabling of a dual-controller enclosure and D2700 6 Gb drive
enclosures featuring dual-expansion modules. Controller module 1A is connected to expansion module
2A, with a chain of connections cascading down (blue). Controller module 1B is connected to the lower
expansion module (5B), of the last drive enclosure, with connections moving in the opposite direction
(green). Fault-tolerant cabling allows any drive enclosure to fail—or be removed—while maintaining
access to other enclosures.
The diagram at right shows the same storage components connected using straight-through cabling. Using
this method, if a drive enclosures fails, the enclosures that follow the failed enclosure in the chain are no
longer accessible until the failed enclosure is repaired or replaced.
Connecting controller and drive enclosures23
1B
1A
Controller B
Controller A
Out
In
Out
In
3B
3A
P1
P1
4B
4A
P2
P2
P2
P2
P1
P1
5B
5A
2B
2A
Out
In
Out
In
Fault-tolerant cabling
1
1
2
2
= LFF 12-drive enclosure
1
= SFF 25-drive enclosure
2
Drive enclosure IOM face plate key:
1B
1A
Controller B
Controller A
Out
In
Out
In
3B
3A
P1
P1
4B
4A
P2
P2
P2
P2
P1
P1
5B
5A
2B
2A
Out
In
Out
In
Straight-through cabling
1
1
2
2
Figure 13 Cabling connections between MSA 2040 controllers and drive enclosures of mixed model type
The figure above provides sample diagrams reflecting cabling of MSA 2040 controller enclosures and
supported mixed model drive enclosures. In this example, the SFF drive enclosures follow the LFF drive
enclosures. Given that both drive enclosure models use 6 Gb SAS link-rate and SAS2.0 expanders, they
can be ordered in desired sequence within the array, following the controller enclosure.
The diagram at left shows fault-tolerant cabling of a dual-controller enclosure and mixed model drive
enclosures, and the diagram at right shows the same storage components connected using straight-through
cabling.
24Installing the enclosures
P1
Controller A
Controller B
1A
1B
P2P1
P1
P1
P1
P1
2A
2B
3A
3B
4A
4B
P2
P2
P2
P2
P2
= LFF 12-drive enclosure
1
= SFF 25-drive enclosure
2
Drive enclosure IOM face plate key:
Controller A
Controller B
In
Out
In
Out
In
Out
In
Out
In
Out
1A
1B
2A
2B
3A
3B
4A
4B
8A
8B
In
Out
In
Out
5A
5B
In
Out
In
Out
6A
6B
In
Out
In
Out
7A
7B
In
Out
In
Out
Note:
The maximum number of supported drive
enclosures (7) may require purchase of
additional longer cable.
2
2
2
1
1
1
1
1
1
1
P2P1
P2P1
8A
8B
P1
P1
5A
5B
P2
P2
2
P1
P1
6A
6B
P2
P2
2
P1
P1
7A
7B
P2
P2
2
2
In
Out
Figure 14 Fault-tolerant cabling connections showing maximum number of enclosures of same type
The figure above provides sample diagrams reflecting fault-tolerant cabling of a maximum number of
supported MSA 2040 enclosures. The diagram at left shows fault-tolerant cabling of an MSA 2040
controller enclosure and seven LFF drive enclosures; whereas the diagram at right shows fault-tolerant
cabling of an MSA 2040 controller enclosure and seven D2700 drive enclosures.
Connecting controller and drive enclosures25
1B
1A
Controller A
Controller B
2B
2A
3B
3A
4B
4A
5B
5A
6B
6A
7B
7A
8B
8A
Continued above right
(see enclosure 5)
Continued from below left
(see enclosure 4)
P1
P1
P2
P2
1
P1
P1
P2
P2
1
P1
P1
P2
1
P1
P1
P2
P2
1
Out
In
Out
In
2
Out
In
Out
In
2
OutIn
OutIn
2
= SFF 25-drive enclosure
1
= LFF 12-drive enclosure
2
Drive enclosure IOM face plate key:
P2
Figure 15 Cabling connections showing maximum enclosures of mixed model type
The illustration above shows a sample maximum enclosures configuration. The diagram shows mixed
model drive enclosures within the dual-controller array using fault-tolerant cabling. In this example, the LFF
drive enclosures follow the SFF drive enclosures. Given that both drive enclosure models use 6 Gb SAS
link-rate and SAS2.0 expanders, they can be ordered in desired sequence within the array, following the
controller enclosure. MSA 2040 controller enclosures support up to eight enclosures (including the
controller enclosure) for adding storage.
IMPORTANT:For comprehensive configuration options and associated illustrations, refer to the HP MSA
2040 Cable Configuration Guide.
26Installing the enclosures
Testing enclosure connections
NOTE: Once the power-on sequence for enclosures succeeds, the storage system is ready to be
connected to hosts, as described in "Connecting the enclosure to data hosts" (page 31).
Powering on/powering off
Before powering on the enclosure for the first time:
• Install all disk drives in the enclosure so the controller can identify and configure them at power-up.
• Connect the cables and power cords to the enclosures as explained in the quick start instructions.
NOTE: MSA 2040 controller enclosures and drive enclosures do not have power switches (they are
switchless). They power on when connected to a power source, and they power off when disconnected.
• Generally, when powering up, make sure to power up the enclosures and associated data host in the
following order:
•Drive enclosures first
This ensures that disks in each drive enclosure have enough time to completely spin up before being
scanned by the controller modules within the controller enclosure.
While enclosures power up, their LEDs blink. After the LEDs stop blinking—
and back of the enclosure are amber—
detected. See "LED descriptions" (page 73) for descriptions of LED behavior.
• Controller enclosure next
Depending upon the number and type of disks in the system, it may take several minutes for the
system to become ready.
• Data host last (if powered down for maintenance purposes)
if no LEDs on the front
the power-on sequence is complete, and no faults have been
TIP:Generally, when powering off, you will reverse the order of steps used for powering on.
Power cycling procedures vary according to the type of power supply unit included with the enclosure. For
controller and drive enclosures configured with the switchless AC power supplies, refer to the procedure
described under AC power supply below. For procedures pertaining to a) controller enclosures configured
with DC power supplies, or b) previously installed drive enclosures featuring power switches, see "DC and
AC power supplies equipped with a power switch" (page 28).
IMPORTANT:See "Power cord requirements" (page 86) and QuickSpecs for more information about
power cords supported by MSA 2040 enclosures.
AC power supply
Enclosures equipped with switchless power supplies rely on the power cord for power cycling. Connecting
the cord from the power supply power cord connector to the appropriate power source facilitates power
on; whereas disconnecting the cord from the power source facilitates power off.
Testing enclosure connections27
Figure 16 AC power supply
Power cord connect
Powe r
switch
Powe r
cable
connect
Power
switch
Power
cord
connect
DC power supply unitLegacy AC power supply unit
To power on the system:
1. Obtain a suitable AC power cord for each AC power supply that will connect to a power source.
2. Plug the power cord into the power cord connector on the back of the drive enclosure (see Figure 16).
Plug the other end of the power cord into the rack power source. Wait several seconds to allow the
disks to spin up.
Repeat this sequence for each power supply within each drive enclosure.
3. Plug the power cord into the power cord connector on the back of the controller enclosure (see
Figure 16). Plug the other end of the power cord into the rack power source.
Repeat the sequence for the controller enclosure’s other switchless power supply.
To power off the system:
1. Stop all I/O from hosts to the system [see "Stopping I/O" (page 53)].
2. Shut down both controllers using either method described below:
• Use the SMU (Storage Management Utility) to shut down both controllers, as described in the online
help and web-posted HP MSA 2040 SMU Reference Guide.
Proceed to step 3.
• Use the command-line interface (CLI) to shut down both controllers, as described in the HP MSA 2040 CLI Reference Guide.
3. Disconnect the power cord male plug from the power source.
4. Disconnect the power cord female plug from the power cord connector on the power supply.
NOTE: Power cycling for enclosures equipped with a power switch is described below.
DC and AC power supplies equipped with a power switch
DC power supplies and legacy AC power supplies are shown below. Each model has a power switch.
Figure 17 DC and AC power supplies with power switch
28Installing the enclosures
Connect power cable to DC power supply
+L
GND
-L
+L
GND
-L
+L
GND
-L
+L
GND
-L
Connector pins (typical 2 places)
Connector (front view)
Ring/lug connector (typical 3 places)
D-shell
(left side view)
Locate two DC power cables that are compatible with your controller enclosure.
Figure 18 DC power cable featuring sectioned D-shell and lug connectors
See Figure 18 and the illustration at left (in Figure 17) when performing the following steps:
1. Verify that the enclosure power switches are in the Off position.
2. Connect a DC power cable to each DC power supply using the D-shell connector.
Use the UP> arrow on the connector shell to ensure proper positioning (see adjacent
left side view of D-shell connector).
3. Tighten the screws at the top and bottom of the shell, applying a torque between 1.7
N-m (15 in-lb) and 2.3 N-m (20 in-lb), to securely attach the cable to the DC power
supply module.
4. To complete the DC connection, secure the other end of each cable wire component
of the DC power cable to the target DC power source.
Check the three individual DC cable wire labels before connecting each cable wire lug to its power
source. One cable wire is labeled ground (GND) and the other two wires are labeled positive (+L) and negative (-L), respectively (shown in Figure 18 above).
CAUTION: Connecting to a DC power source outside the designated -48V DC nominal range
(-36V DC to -72V DC) may damage the enclosure.
Connect power cord to legacy AC power supply
Obtain two suitable AC power cords: one for each AC power supply that will connect to a separate power
source. See the illustration at right [in Figure 17 (page 28)] when performing the following steps:
1. Verify that the enclosure power switches are in the Off position.
2. Identify the power cord connector on the power supply, and locate the target power source.
3. For each power supply, perform the following actions:
a. Plug one end of the cord into the power cord connector on the power supply.
b. Plug the other end of the power cord into the rack power source.
4. Verify connection of primary power cords from the rack to separate external power sources.
Power cycle
To power on the system:
1. Power up drive enclosure(s).
Press the power switches at the back of each drive enclosure to the On position. Allow several seconds
for the disks to spin up.
2. Power up the controller enclosure next.
Press the power switches at the back of the controller enclosure to the On position. Allow several
seconds for the disks to spin up.
To power off the system:
1. Stop all I/O from hosts to the system [see "Stopping I/O" (page 53)].
2. Shut down both controllers using either method described below:
Powering on/powering off29
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