IBM TotalStorage FAStT EXP700, Installation, User'S, And Maintenance Manual

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v Hot-case upgrade — The DS4000 EXP700s and connected storage server
remain powered on when ESMs are replaced. You should schedule the upgrade
during non-peak I/O period. Use the DS4000 Storage Manager performance
monitor function to determine the non-peak I/O load time if required.
Note: It is recommended that you schedule the hot-case ESM upgrade during a
non-peak (low-usage) I/O period for the following reasons:
– The DS4000 storage server drive loops/channels will be disturbed with
FC Loop Initialization events every time the ESM is replaced.
– One of the drive loops in the drive loop will be down during the
upgrade, reducing the maximum data bandwidth to the drives by
one-half.
Important
After a DS4000 EXP700 is upgraded with the DS4000 EXP700 Models
1RU/1RX Switched-ESM Option Upgrade Kit, it is considered a DS4000
EXP710 for the purposes of cabling your drive loop. Therefore, if you are not
upgrading all the DS4000 EXP700 storage expansion enclosures in a drive
loop, you must follow the intermixing requirements for redundant drive loops
that include both DS4000 EXP700s and DS4000 EXP710s. These
requirements state that all DS4000 EXP710s in a redundant drive loop must
be grouped together. See “Intermixing DS4000 EXP700s and DS4000
EXP710s in the same loop” on page 44.
Cold-case ESM upgrade procedure
In the cold-case ESM upgrade procedure, you must power down the storage
subsystem before upgrading the DS4000 EXP700 ESMs. If your environment does
not allow you to power down the storage subsystem in a non-emergency situation,
use the “Hot-case ESM upgrade procedure” on page 88.
Note: The cold-case ESM upgrade procedure is recommended if you are
intermixing DS4000 EXP700s and DS4000 EXP710s in the same drive loop.
Attention: If you are not upgrading all of the DS4000 EXP700s in the redundant
drive loop, or if you are upgrading additional DS4000 EXP700s in redundant drive
loop that includes both DS4000 EXP700s and DS4000 EXP710s, you must follow
the intermixing requirements for drive loops that include both DS4000 EXP700s and
DS4000 EXP710s. See “Intermixing DS4000 EXP700s and DS4000 EXP710s in the
same loop” on page 44. Failure to do so can result in drive loop performance
problems due to excessive time-outs and LIPs.
1. Before you begin the upgrade procedure, perform a full system backup and
save the storage subsystem profile.
2. Upgrade the Storage Manager client to version 9.1 or later.
3. Upgrade the ESM firmware for all DS4000 EXP700s to version 9326 or later.
4. Upgrade the controller firmware to version 6.10.xx.xx or later.
Attention: No I/O activity can be present during the firmware upgrade from
version 5.4x.xx.xx or earlier to version 6.10.xx.xx or later.
5. After you have upgraded the Storage Manager client and controller firmware,
verify that the storage server is in optimal condition. Use the Recovery Guru
function in the Storage Manager client Subsystem Management window for
information on how to fix any non-optimal conditions.
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IBM TotalStorage DS4000 EXP700 and EXP710 Storage Expansion Enclosures: Installation, User’s, and Maintenance Guide