topic Re: VA7400 disk failure in Disk Enclosures

VA7400 disk failure

Saulius_1 — Thu, 08 May 2003 04:03:20 GMT

Recently we had one disk failure on VA7400. Array has recovered data from redundancy, BUT - SDM gui still shows, that there are hot spares for each redundancy group. WTF ? What action is needed to allocate hot spare for failed disk ? Our VA is in autoraid mode, and using RAID0+1 right now.
Of course we will get new disk ASAP, but I'm worrying about the data and possible downtime ...

Saulius

Re: VA7400 disk failure

Eugeny Brychkov — Thu, 08 May 2003 04:13:03 GMT

Please attach 'armdsp -a' output and I will be able to explain you in details.
In your case rebuild has been completed and there's enough space for this rebuild to complete successfully and space for active hot spare. If you do not see any warnings like 'redundancy lost' then there's enough space for next rebuild. But of course, you should replace failed component ASAP to keep redundancy at initial level
Eugeny

Re: VA7400 disk failure

Saulius_1 — Thu, 08 May 2003 05:57:57 GMT

Actually I suspect that VA firmware reallocated data, and "made" new hot spare. Because I see in the armdsp output:

CAPACITY USAGE

Total Disk Enclosures:________________2

Redundancy Group:_____________________1
Total Disks:________________________11
Total Physical Size:________________734,329 GB
Allocated to Regular LUNs:__________232,1 GB
Allocated as Business Copies:_______0 bytes
Used as Active Hot Spare:___________66,753 GB
Used for Redundancy:________________169,704 GB
Unallocated (Available for LUNs):___265,77 GB

Redundancy Group:_____________________2
Total Disks:________________________8
Total Physical Size:________________534,057 GB
Allocated to Regular LUNs:__________147 GB
Allocated as Business Copies:_______0 bytes
Used as Active Hot Spare:___________66,753 GB
Used for Redundancy:________________147,86 GB
Unallocated (Available for LUNs):___172,443 GB

Used by Non-Included Disks:___________66,757 GB

Re: VA7400 disk failure

Eugeny Brychkov — Thu, 08 May 2003 09:59:17 GMT

Yes, I believe it should be this way. When disk fails, VA does rebuild, after rebuild it checks if there's a still space for active hot spare (checks unallocated space) and if there's a space, it 'eats' active hotspare space from unallocated area
Eugeny