HP NetRAID 1Si Controller - Manual (Page 46)

Chapter 2 HP NetRAID Assistant
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Changing Logical Drives Currently in Use
You can make several kinds of changes to logical drives that are currently in use.
You can:
•
Change the RAID level.
•
Remove a physical drive.
•
Add a physical drive. See Chapter 6, "Capacity Expansion," in this guide
for complete instructions.
All such changes to existing logical drives require reconstructing the data.
Reconstruction is the process of reorganizing the data to correspond to a change
in the HP NetRAID system. Reconstruction occurs in the background, so the
HP NetServer and the affected logical drive remain available throughout the
reconstruction process.
NOTE Once started, the reconstruction process cannot be stopped.
The Power Fail Safeguard feature protects logical drives against data loss during
the reconstruction process should a power failure occur. For complete
information, see "Power Fail Safeguard Feature" in Chapter 5 in this guide.
Changing the RAID Level of a Logical Drive
To make RAID level changes, refer to the valid RAID level changes listed in the
following table when altering a logical drive.
NOTE You cannot change the RAID level of any logical drive that
spans arrays (RAID levels 10, 30, or 50).