HP StorageWorks EVA Controller HSG V8.8 Software - Manual (Page 80)

Using the Storage Window
80 Command Console V2.5 User Guide
Managing and Creating Spare Devices
Making a spare device part of a virtual disk lets you protect the integrity of the
RAID setup. A spare is especially important for virtual disks that have RAID
requirements of two or more devices. If one device fails, the virtual disk instantly
and automatically activates the spare device as a replacement.
A spare works as follows: if a device fails in a RAID 1, RAID 0+1, or RAID 3/5
virtual disk, the spare automatically replaces the failed device and the controller
reconstructs all virtual disks of which the failed device was a member.
After the controller writes data to a spare, the spare becomes part of the same
device group in which a device failed.
Creating a Spare Device
To create a spare device:
1. In the Storage window, click the device that you want to use as a spare. For an
automatic failed drive replacement, the device must be available and have a
capacity equal to or greater than the lowest capacity drive in the group.
2. From the Storage menu, choose Device, and then choose Make Spare.
Clearing Failed Devices
In the Storage window, the icon of a failed device is displayed with an X covering
it.
To clear the failed device:
1. From the Storage menu, choose Device.
2. Then choose Delete.