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Hi, I am using openfiler and for past 3 months it has been working without a problem.
Just today, when I booted the server, I got an error via email that the raid array has been degraded.
The setup is as follows:
Boot Device: /dev/hda1 (IDE disk)
Array was composed of sda1,sdb1,sdc1 and sdd1. All 4 SCSI discs. There are no other partitions on these.
sdd1 has become faulty and, as you have no spare drive in the array, the drive has been marked as faulty and the array is working in degraded mode. sdd1 will still appear but the array will not write to it, hence you are seeing 3x250Mb and not 1Tb of capacity.
You should replace the drive immediately and allow the array to reconstruct.
sdd1 has been removed and added back but is shown as faulty, therefore no writes can be made.
You could remove the drive and perform checks/low level format but I would caution against doing anything on the array.
If the checking and/or format resolve the issue then you may be safe to put the drive back into the array however experience dictates that when a drive failes it will usually return to bad sooner rather than later...