Chapter 15. Removal and Replacement Procedures

Exchanging Disk Drives

1. If you are removing a disk drive under concurrent maintenance (see the service
information for the device that contains the disk drive), you must first determine
which hdisk is using the pdisk that you want to remove. Todo this, you can either
use the Configuration Verificationservice aid (see “Configuration Verification
ServiceAid”on page 387), or give the ssaxlate command from the command line
(see “ssaxlate Command”on page 372).
vIf no hdisk is using the pdisk, go to step 13on page 323.
vIf an hdisk is using the pdisk, you must now determine the type of the hdisk.
The hdisk might be an SSAdisk drive or a RAID disk. To determine whether the
hdisk is a RAID disk, type:
smitty lsdssaraid
Alist is displayed of all hdisks that are configured as RAID arrays.
–If an hdisk that is a RAID-1, RAID-5, or RAID-10 array is using the pdisk, you
can remove the disk drive from the array.Go to step 7 on page 322.
–If an hdisk that is a RAID-0 array is using the pdisk:
a. Ask the customer to make a backup of the data (if possible) from the
array,and to make the disk free.
b. Ensure that you delete the array before you exchange the pdisk.
c. Note the hdisk number.
d. Go to step 2.
vIf the hdisk is not a RAID pdisk:
a. Ask the customer to make a backup of the data (if possible) from the array,
and to make the disk free.
b. Ensure that the fast-write function is disabled (see “Enabling or Disabling
Fast-Write for One Disk Drive”on page 214).
c. Go to step 13on page 323.
2. Attention: Youshould be here only if you are working with a RAID-0 array.
For fast path, type smitty rmssaraid and press Enter.
Otherwise, select Delete an SSA RAID Array from the SSA RAID Array menu.
Alist of arrays is displayed in a window:
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