Raid Controller Levers And Labels - IBM TotalStorage DS4300 Installation, User's, And Maintenance Manual

and installation dates on the top of the controller unit. Figure 83 shows the location
of these items.
Figure 83. RAID controller levers and labels
For information about the RAID controller cache memory and rechargeable battery,
see "Cache memory and RAID controller battery" on page 101.
Replace both controllers at the same time. To upgrade your RAID controllers,
complete the following steps.
Before you begin: Schedule the upgrade to take place at a convenient time,
because the storage subsystem will be powered down during the upgrade process.
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IBM TotalStorage DS4300 Fibre Channel Storage Subsystem: Installation, User's, and Maintenance Guide
Ethernet address label
Levers
1. Open a management connection to the DS4300 using the Storage Manager
client.
2. Save the storage subsystem profile to a disk location that is not in the DS4000
storage subsystem that you are upgrading. In the Subsystem Management
window, select View-->Storage Subsystem Profile. When the Storage
Subsystem Profile window opens, click Save As. The Save Profile window
opens. Select an appropriate directory and choose a file name for the profile,
then click Save.
Click Close to close the Storage Subsystem Profile window.
3. Complete any necessary server preparation tasks, because the disks will not
be available during the upgrade process. For example, stop all programs,
services or processes in the host servers that access the logical drives.
Note: Make sure that you stop any background programs, services or
processes that write data to the logical drives. For example, Microsoft
MSCS periodically writes to the Quorum disk.
4. Use the Storage Manager client to flush and disable the read/write cache on
both controllers, using the following steps. Either check that the cache LED on
the back of the controller is off or wait two to three minutes.
a. In the Logical/Physical View of the Subsystem Management window,
right-click any of the logical drive tree nodes and select Change-->Cache
Settings. A Change Cache Settings window opens.
b. Click Select All to select all logical drives, and deselect all of the Cache
Setting Enable check boxes, then click OK. Click OK when the
Confirmation window opens.
Battery-access panel (on bottom)