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[20060216] Do you know what disk your data is on?
Do you really know what disk your data is on? This may be an easy question when you only have single harddisks, but with vnd(4), ccd(4) and raid(4) it's not so obvious any more, and to get the real fun started, who said you can't use things like a RAID 1+0 configuration?!

The problem appears when you try to check filesystems: in order to avoid hitting a disk with partitions used in two vnd/ccd/raid/whatever configurations, some intelligence is needed. One approach is to leave this to the system administrator (which has some drawbacks), another one is to figure it out automatically, and teach fsck(8) to not hit a disk (spindle) twice at the same time.

Robert Elz has proposed a framework for sorting this out. It includes the start of a patch, but more work is needed, and some help is needed. Please mail the missing pieces of the puzzle back to Robert!

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