RAID configuration for Thalia production cluster
The Thalia production cluster needed large amounts of disk storage available locally to hold its content. To provide this, a RAID array was built in the cluster, as follows:
Base hardware for the Thalia production cluster in the HP DL380 G5. It has drive bays for 8 SATA or SAS drives. We had it populated with 8 146 Gb dirves, built into 2 RAID arrays: A
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A RAID 1 array of 2 disks, with a total of 140 Gb, for the OS. A RAID 5 array of 6 disks, 4 for data, 1 for parity, and 1 hot spare, with a total of 538 Gb, mounted at /home. It holds the picture content files. |
If a drive in the RAID 5 array fails, the spare disk will automatically be used as a replacement for the failed drive. Having the parity drive in place means that 2 drives will have to fail before data lose occurs.
The RAID 1 array is performing direct mirroring, so we would have to loose both disks before data is lost.
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