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With RAID level migration function, it has two different type “On line” and “Off line” alone with
limitation as listed below.
1. During RAID level migration, it is not allowed reboot or shutdown system.
2. Off line RAID level migration, all services will stop and data is inaccessible.
3. To have ZFS file system created doing on line RAID level migration from
R1 to R5
or R1 to R6
, the all services will restart and volumes “user data” and “iSCSI” are
read only during operation.
4. To have ext3 and XFS file system created doing on line RAID level migration from
R1 to R5 or R1 to R6
, the all services will restart and volumes “iSCSI” is read only
but “user data” is capable read / write during operation.
5. The other combination to make as “On line” can have read / write work as normal.
Below is a table listing of possible RAID migration schemes:
NOTE
Migrating a RAID volume could take several hours to complete
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