HP NetRAID 1Si Controller - Manual (Page 48)

Chapter 2 HP NetRAID Assistant
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Removing a Physical Drive from a Logical Drive
The procedures for removing a physical drive from a logical drive vary depending
on the RAID level of the logical drive.
RAID Level 0
There is no data redundancy in a RAID 0 system, so you cannot remove a physical
drive while the HP NetServer is available. To remove a physical drive from a
RAID 0 logical drive, you must back up your data, reconfigure the logical drive,
then restore the data.
RAID Levels 1, 3, or 5
RAID levels 3 and 5 use parity to provide data redundancy. RAID level 1
provides data redundancy through mirroring. In either case, follow these
procedures to remove a physical drive from any logical drive of RAID levels 1, 3,
or 5.
1. Change to "Fail" the status of the drive you want to remove following these
steps:
a. Choose Physical Drv from the main menu of HP NetRAID Assistant.
b. Choose Change Status from the Physical Drive menu.
c. Select Make Offline. An audible warning sounds if the drive is
controlled by an HP NetRAID Series adapter. (For an integrated
HP NetRAID controller, there is no audible warning.)
d. Turn off the audible warning by selecting the Adapter menu, then
choosing Alarm Control, then Silence Alarm.
e. Return to the main menu of HP NetRAID Assistant.
2. Change the RAID level of the logical drive to RAID 0 by using the
instructions in "Changing the RAID Level of a Logical Drive" in this
chapter. The logical drive will be rebuilt as a RAID 0 and will not include
the drive you just took offline (now in the Fail state).
3. If you want to convert the logical drive to a RAID level with redundancy,
change the RAID level once again to RAID 3 or 5.
4. Change the status of the drive you removed back to the Ready state by
using these instructions:
a. Choose Physical Drv from the main menu of HP NetRAID Assistant.
b. Choose Change Status from the Physical Drive menu.
c. Select Make Online.