IBM DCS3860, Installation, User'S, And Maintenance Manual

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Use this procedure to replace a failed drive drawer FRU. The disk drives in the
drawer to be replaced must be removed and reinstalled in the replacement drive
drawer. See “Replacing hot-swap hard disk drives” on page 92 for the steps to
remove a DDM.
Attention:
1. Potential hardware damage - Electrostatic discharge can damage sensitive
components. To prevent electrostatic discharge damage to the storage expansion
enclosure, use proper anti-static protection when handling components.
2. Potential loss of data access - If the logical unit numbers (LUNs) have already
been assigned and created, the location of the drives in drive drawer is critical.
Record the location of the drives before removing the drives from the drawer.
3. Potential loss of data access - Replacing a drawer will cause all of the drives in
the replaced drawer to be unavailable to the controllers in the storage system.
If the arrays that have drives in the to-be-replaced drawer were created without
drawer loss protection, you must schedule down time to replace the drawer
because these arrays will fail when the drawer is replaced. Examples of arrays
without drawer loss protection:
v
Raid 6 arrays with more than two drives in the to-be-replaced drawer
v Raid 1, 3, or 5 arrays with more than one drive in the to-be-replaced drawer
v
Raid 0 array
1. Prepare the drive drawer for removal by completing the following steps:
a. If possible, stop the I/O activity to the storage expansion enclosure. If it is
not possible to stop the I/O activity, perform the drive drawer replacement
during a period of low I/O activity.
b.
If power is not applied to the storage expansion enclosure, go to step 3.
c. Open the script window and run the following SMcli script command:
set enclosure [enclosureID] drawer [drawerID]
serviceAllowedIndicator=on;
Where:
v [enclosureID]
is the identifier of the storage expansion enclosure that
contains the replaced drive drawer. Drive enclosure ID values are 0 to
99.
v [drawerID]
is the identifier of the replaced drive drawer. Drawer ID
values are 1 to 5.
Note: Prepare for Removal turns on the blue Service Action Allowed LED
located on the front of drive drawer, the Service Action Allowed LEDs
located on each side of the drawer in the back, and lights the Service
Action Allowed LED on all the installed drives in the drawer. It also
prevents the controller from accessing the drives in the drawer.
2. Remove the bezel from the front of the storage expansion enclosure. See
“Replacing the bezel” on page 106 for the steps to remove the bezel.
3. Remove the cable chains from the rear of the drive drawer to be removed by
completing the following steps:
a.
At the rear of the drive enclosure, remove the right fan assembly. See
“Replacing a fan assembly” on page 108 for the steps to remove a fan
assembly. Figure 56 on page 111 indicates the area with the fan assembly
removed.
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IBM System Storage DCS3860 Storage System: Installation, User's, and Maintenance Guide