Troubleshooting
Problem
The user creates a RAID array with RAID level 6 with an odd number of drives. After the array is created, the amount of usable space is less than expected. With our current documentation, when assigning RAID level-6 to a logical drive, the capacity is reduced by the capacity of two drives (for data-parity storage). This second set of parity information is added to improve fault tolerance.
Resolving The Problem
| Source |
|---|
RETAIN tip: H192265
| Issue |
|---|
The user creates a RAID array with RAID level 6 with an odd number of drives.
After the array is created, the amount of usable space is less than expected. With our current documentation, when assigning RAID level-6 to a logical drive, the capacity is reduced by the capacity of two drives (for data-parity storage).
This second set of parity information is added to improve fault tolerance.
| Affected configurations |
|---|
This tip is not machine specific.
This tip is not option specific.
This tip is not software specific.
| Additional information |
|---|
This configuration is working as designed.
HARD DRIVES CAPACITY 4 2 5 2.5 6 4 7 4.66 8 6 9 6.75 10 8 11 8.8 12 10 13 10.83 14 11.67 15 12.5 16 14
Document Location
Worldwide
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Document Information
Modified date:
29 January 2019
UID
ibm1MIGR-5073789