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Slade

RAID 6 writes have really slowed

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I have an Adaptec 6805 with 7 3TB Hitachi 7200rpm disks in RAID 6 (Win 7x64, i3-2100, 8GB RAM, just a storage box no other tasks). 6-8 TB empty space still and updated to the latest firmware and storage manager software.

Reads are as good as ever, but over the past few weeks writes have slowed to a crawl, like 20MB/s. All disks and the array indicate optimal status from the boot screen and storage manager software.

It sure seems to me like a disk is bad, just hard to figure out since they all are listed as optimal.

Any ideas on troubleshooting this?

Thanks!

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Pull a disk out one at a time to run Hitachi's Drive Fitness Test? Kind of ugly...

Aside from that, can only think that maybe a caching setting got changed, if it's not a failing disk...

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I got lucky -- second disk I pulled was the problem. Stuck in a replacement and rebuild is done.

Not sure why maxView didn't detect it, but the card is out of warranty so no more support. :rolleyes:

Thanks

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