Quote:
Originally Posted by KlenTelaris
I have soft raid with 2 drives, and so far every time when drive failed it was working fine by replacing faulty drive. But not last time, some of data was lost, which indicate how that method is not good enough obviously.
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This is exactly where a BBU would have helped as it stores data in a cache that can be written back to the raid when the replacement drive is added. It won't power the RAID, but will provide a pretty decent window to have the drive replaced without the loss of data.
Of course, this necessitates having a hardware raid too.