Removing And Replacing A Drive Module; Replacing A Drive Module When The Virtual Disk Is Rebuilding - R/Evolution 2000 Series Troubleshooting Manual

Removing and Replacing a Drive Module

A drive module consists of a disk drive in a sled. Drive modules are hot-swappable,
which means they can be replaced without halting I/O to the storage system or
powering it off.
Caution –
disk or other location before removing the drive module.
Caution –
disk, the new module must be the same type (SAS or SATA) and must have a
capacity equal to or greater than the drive module you are replacing. Otherwise the
storage system cannot use the new disk drive to rebuild the virtual disk.
If you are using disk management software or volume management software to
manage your disk storage, you might need to perform software operations to take a
drive module offline before you remove it and then, after you have replaced it, to
bring the new drive module online. See the documentation that accompanies your
disk management software or volume management software for more information.
Replacing a Drive Module When the Virtual Disk
Is Rebuilding
When a drive module fails or is removed, the system rebuilds the virtual disk by
restoring any data that was on the failed disk drive onto a global spare or virtual
disk spare, if one is available. If you replace more than one drive module at a time,
the virtual disk cannot be rebuilt. If more than one drive module fails in a virtual
disk (except RAID 6 and 10), the virtual disk fails and data from the virtual disk is
lost.
When you want to replace a drive module and a virtual disk to which it belongs is
being rebuilt, you have two options:
Wait until the rebuild process is completed, and then replace the defective drive
■
module. The benefit is that the virtual disk is fully restored before you replace
the defective drive. This eliminates the possibility of lost data if the wrong drive
is removed.
104 R/Evolution 2000 Series Troubleshooting Guide • May 2008
To prevent any possibility of data loss, back up data to another virtual
When you replace a failed drive module for a degraded or critical virtual