Promise Technology VTrack M-Class M200i User Manual
Page 263

Chapter 7: Technology Background
255
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