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тАО03-31-2009 07:16 AM
тАО03-31-2009 07:16 AM
I have 2 EVA5000,
version CR04BBvcsp-3020,
Command View EVA V6.0.2 Build 37
the vdisk's have this write back cache status:
Requested: Write-back
Actual: Unknown
is this "unknown" normal?
Thank's
G├йrard
Solved! Go to Solution.
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тАО03-31-2009 08:11 AM
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тАО03-31-2009 12:29 PM
тАО03-31-2009 12:29 PM
Re: eva5000 write back status unknown
Do the cache batteries have a good status ?
That might affect the cache status...
Cheers,
Rob
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тАО04-01-2009 09:03 AM
тАО04-01-2009 09:03 AM
Re: eva5000 write back status unknown
I have noticed a low voltage condition on one HSV on one eva. But all the vdisk's even on EVA with no erros have their write-back cache status "unknown"
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тАО04-01-2009 09:16 AM
тАО04-01-2009 09:16 AM
Re: eva5000 write back status unknown
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тАО04-01-2009 09:31 AM
тАО04-01-2009 09:31 AM
Re: eva5000 write back status unknown
the following cache policies are applied on eva 3k/5k:
1. if the system battery on any controller is bad and
a)if the system battery on the second controller is bad too, there is no data disk presentation
b)if the second controller system battery low, all disks writethrough on the second controller
c)if the second controller system battery good, all disks writeback on the second controller
2. if the system battery on any controller is low and if the second controller system battery good, all disks writeback on the second controller.
3.
a) if both controller system battery low, all disks writethrough on both controllers
b) if both controller system battery good, all disks writeback on both controllers
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тАО04-02-2009 01:02 AM
тАО04-02-2009 01:02 AM
Re: eva5000 write back status unknown
But in my case the staus "unknown" is also on the second EVA5000 that has no battery low condition.
gerard