For those that are inquisitive, I get a lot of questions on the mysterious layout of the Vault Drives within the Clariion Series Arrays. The Vault drives are an area of the Clariion for software and configuration information. The space is reserved on drives 0-4 in enclosure 0 on bus 0. 62G worth of space is allocated to this private area on each Vault Drive. Consequently, on all other drives user space starts at 34MB as noted here…

One other common focus of the Vault drives is the write cache dump area. During a period of power loss to the array, the contents of the write cache get dumped to this reserved area. Therefore protecting any active writes that have yet been committed to disk.

So in a more granular sense, here is how this discreet area is partitioned…

• 
• PSM LUN or Persistent Storage Manager- 2GB trimmings, triple mirrored on the first 3 disks
• SP and FLARE Boot partition: 45GB, mirrored for each SP
• The Cache Vault area: to save contents of write cache
• The Image Repository: 5.5GB per disk, triple mirrored on disks 0, 1, and 4
• Utility Partition: 3GB, mirrored for each SP

Hope that helps..for additional info please visit the following excellent sites below. 

And btw…after reading Devang’s post and comments I finally got an answer to my post, Clariion FLARE Revision Breakdown. Specifically what the “5” signifies across all FLARE code Designations…I feel better..

[D] Stands for Software Distribution Type
0 - Debug Private
1 - Debug Frozen
2 - Retail Private
3 - Retail Frozen
4 - Early Access
5 - General Release
6 - Special

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