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тАО02-29-2004 07:33 PM
тАО02-29-2004 07:33 PM
Problem with AutoRAID disk replacement
even included in the list. From control panel, number of disks included were 11, not 12. Did not require rebuild (since it has a hot spare, I thought the array was rebuilding the disks to it).
I removed the disk and inserted a new A3714-60001 disk. Disk LED was first amber, then it switched off. For some reason, although we never used the disk, the system reported that the disk was used in another array, so it
couldn't be auto included. I manually included the disk, and the array state returned to ready and green state. For some reason, it did not require a rebuild! I thought that the disk will be rebuilt from the hot spare, but it didn't. I started a manual rebuild to no avail. Number of disks reported by arraydsp -a, control panel and sam was 12 now, not 11. For some reason,
though, the disk was never accessed by the autoRAID. It never had a read or write request on the disk. Array status is READY, for the autoRAID everything is fine. The customer did not report any data corruption. But it's strange that disk B2 never ever rebuilded and never ever flashed its LED for read or write.
The AutoRAID contains 4 LUNS of 18Gb each, so there is relatively small amount of data. Firmware on both controllers is HP60. What could be the issue? Customer is working fine, but there is still this issue.
Many thanks,
Vince
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тАО03-01-2004 02:20 AM
тАО03-01-2004 02:20 AM
Re: Problem with AutoRAID disk replacement
If all 12 disks indicate that they are now included then all is well. If this really bothers you then you can force a rebuild from the front panel. Menu -> Disk Changes -> Start Rebuild. Even in this case, I suspect that the rebuild will complete in only a few seconds.
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тАО03-01-2004 02:28 AM
тАО03-01-2004 02:28 AM
Re: Problem with AutoRAID disk replacement
I tried to force this rebuild myself but the array just told me READY immediately. Attached please find the output of armdsp -a after the drive was replaced.
Thanks for your help so far,
Vince
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тАО03-01-2004 05:01 AM
тАО03-01-2004 05:01 AM
Re: Problem with AutoRAID disk replacement
Sometimes the AUTORaid systems aren't very "smart". Adding a new disk doesn't guarantee that it will be used for data immediately. The data remains on the disks it was previously on, but it will be rebalanced over time.
The thing to remember is that the total throughput of the connection to the array is 20MB/s, and each disk is 10MB/s. you would probably gain nothing in the way of performance from the disk being unused. I suggest to wait a few days, and see if the new disk is being accessed then.
There's also a small chance that the green LED is not functioning on that disk unit.
Josh
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тАО03-01-2004 05:16 AM
тАО03-01-2004 05:16 AM
Re: Problem with AutoRAID disk replacement
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тАО03-01-2004 06:31 PM
тАО03-01-2004 06:31 PM
Re: Problem with AutoRAID disk replacement
The green LED on the disk is working because when I do armlog on it, it flashes green slightly before giving me the output.
I will monitor the AutoRAID in the next few days to see what will happen. Many thanks so far.
Vince
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тАО03-10-2004 01:29 AM
тАО03-10-2004 01:29 AM
Re: Problem with AutoRAID disk replacement
Just to let you know what happened.
The drive is STILL not being used by the AutoRAID. According to response centre, this is normal if you have a small amount of data, like the customer has. If there is increasing data, this disk will be used for performance.
Case Closed, thanks for everybody's help.
Vince