Promise Technology 2-Year Extended Warranty for VessR2000 RAID Head - Manual (Page 603)

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Vess R2000 Series Product Manual Promise Technologies
RAID 50
A RAID 50 source logical drive can migrate to the following target logical drives:
Target Requirements
RAID 0 None.
RAID 1E None.
RAID 5 32 physical drives maximum.
RAID 6
32 physical drives maximum.
RAID 50 must have less than 32 physical drives.
If existing physical drives have no unused space, add 1 or more physical
drives.
RAID 10 Even number of physical drives.
RAID 50 Add physical drives. 32 per axle maximum.
RAID 60
8 physical drives minimum, 32 per axle maximum.
If existing physical drives have no unused space, add 1 or more physical
drives.
You can add physical drives to a RAID 50 array but you cannot change the number of axles.