On Tue, 20 Jul 2010 19:34:06 -0700 "Michael Li" <michael.li@xxxxxxxxxxx> wrote: > Hi , > > > > I am using RAID10 far copy 2 by 4 disks, when I removed the first disk > and last disk, I think this raid should be failed, but mdadm -D > /dev/md2, I saw it was degraded, but when I try to read/write, there > will be I/O error. And when I added the two disks again, the raid will > be recovery, so that's normal? why it is designed like this? > > > > Anyone know the detail about that? Thanks so much! > Sounds like a bug. You have definitely lost data if the first and last devices of such an array go missing, so it should not try to recover a spare in to either slot. What kernel version are you using? NeilBrown -- To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
