Promise Technology VTrack M-Class M200i - Manual (Page 263)

Chapter 7: Technology Background
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RAID 5 RAID 50 •*
RAID 10 •
RAID 0 • • •
RAID 1/1E RAID 50 • •
RAID 10 • •
RAID 5 • •
RAID 0 • • •
RAID 0 RAID 50 • • •
RAID 10 • • •
RAID 5 • • •
RAID 1/1E •
* Increases the existing redundancy
Important
• The Target disk array may require more disk drives than the
Source disk array
• If the Target disk array requires an EVEN number of disk
drives but the Source disk array has an ODD number, ADD a
disk drive as part of the migration process
• You cannot reduce the number of disk drives in your disk
array, even if the Target disk array requires fewer disk drives
than the Source disk array
• RAID 1 (mirroring) works with two drives only. Only a single-
drive RAID 0 disk array or a single-drive JBOD can migrate to
RAID 1. Other RAID Levels use too many drives to migrate
• You cannot migrate a disk array when it is Critical or
performing activities such as Synchronizing, Rebuilding, and
PDM
From To
Increase Redundancy
Capacity Performance Add Lose