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тАО07-31-2002 08:44 AM
тАО07-31-2002 08:44 AM
I have a 12H with 4x2GB disks. The configuration as returned by arraydsp is:
Total Physical: 8135MB
Allocated to LUNS: 3837MB
Used as Active Hot Spare: 2033MB
Used for Redundancy: 2229MB
Unallocated: 0MB
If one of the data disks fail on this array (as it happened today), the entire array stops and no redundancy kicks in!
I see a lot of "active spare space unavailable" messages on the syslog, however to this moment nobody has been able to provide a comprehensive description of this situation.
I imagine the Hot Space device is used to make space for RAID 0/1 (dynamically allocated by the disk array) and to be used as a regular disk (with decreased performance) in case of a system failure. However, that's not what I observe here at all.
Any ideas?
Solved! Go to Solution.
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тАО07-31-2002 09:15 AM
тАО07-31-2002 09:15 AM
Re: 12H requires manual intervention on failure
Good Luck.
Steve
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тАО07-31-2002 09:47 AM
тАО07-31-2002 09:47 AM
Solution# arraydsp -a
The active hot spare, when activated basically does its rebuild by distributed across all disks in the array and uses it for RAID 1 mirroring. I do not know is it would make any difference by reserving some space (say about 1-2% of your total physical space) in "unallocated". My thinking is it should not but I always leave some unallocated space behind and so far it hasn't complain. It is very likely too you might have some bad section on the disks. This can be determine by running STM's exerciser to make sure all the isk modules are in good shape.
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тАО07-31-2002 10:00 AM
тАО07-31-2002 10:00 AM
Re: 12H requires manual intervention on failure
Another reason HS will fail is if bad blocks arenoticed on rebuild.
Later,
Bill
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тАО07-31-2002 12:02 PM
тАО07-31-2002 12:02 PM
Re: 12H requires manual intervention on failure
AUTOREBUILD is set to on. I noticed however that most of my drives have a "Grown Defect List", which is a Bad Thing(tm).
I suppose having bad blocks in the Hot Spare is dangerous since during a failure no space would be available to rebuild the array. However, my data disks ALSO have bad blocks :( I wonder if I should replace the Hot Spare or ALL my drives with errors...
Paga
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тАО07-31-2002 01:57 PM
тАО07-31-2002 01:57 PM
Re: 12H requires manual intervention on failure
# arraylog -d A1
A1 being the disk module in slot A1, I repeated that on all my disks and I do not see any entries in the GDL. What does your ..
"corrected read/write errors with delay" says ? They should be ZERO. If you're seeing some numbers in there it means subsequent tries of read/write recovery on your disk is having delay, maybe due to bad blocks/sectors or whatever. Also take a look at "total uncorrected read/write error", they should also be zero. If they are not you got to give your local HP response center a call and find out what they have to say. I can bet you 2 things ..
- Load latest firmware if STM does not indicate and IO error
- Replace disks if STM sees IO errors.
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тАО07-31-2002 03:04 PM
тАО07-31-2002 03:04 PM
Re: 12H requires manual intervention on failure
Good Luck.
Steve
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тАО08-01-2002 06:05 AM
тАО08-01-2002 06:05 AM
Re: 12H requires manual intervention on failure
All my "Corrected with delay" totals are zeroed. I did notice however that all of the errors have been ECC corrected. I suppose the read (or write) was performed successfully, but the block was subsequently marked as bad and won't be reused. Is that correct?
Cheers,
Paga
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тАО08-01-2002 06:41 AM
тАО08-01-2002 06:41 AM
Re: 12H requires manual intervention on failure
==> That's good, at least the integrity of the drives are still intact.
I suppose the read (or write) was performed successfully, but the block was subsequently marked as bad and won't be reused. Is that correct?
==> That's what I think happened. Still if GDL exists you have to minitor and see if they grow over time.
Have you try running STM exerciser on one of the disk just to find out if the diagnostics tool from the OS side reports any error or not ?
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тАО08-01-2002 07:45 AM
тАО08-01-2002 07:45 AM
Re: 12H requires manual intervention on failure
The problem with STM is that is "sees" the array as a single thing. I'm using drivetest/dteststat to test disk by disk.
Paga