On Sat, March 28, 2009 11:37 pm, Patrick Ringl wrote: > Hello, > > I am using 2.6.29 on a debian lenny. Anyway, I am having problems with a > raid10 sandbox setup consisting of 4 loopback devices. To make a long > story short: > > I created a raid10 array with all these 4 devices (loop0-loop3) > then I set two devices faulty, removed them .. checked if I can still > write to the array (which I could, so I/O errors, nothing in dmesg): > > BUT - here it comes: once I am trying to (re)add them (I zero'ed the > superblock before) they're only getting added as spares and the array > will not sync. > > Here's the logfile with mdadm -D /dev/md0 in between so one can see what > is going on: > > http://pa#ste.debian.net/31758/ > Linux RAID10 with Raid Level : raid10 Raid Devices : 4 Layout : near=2, far=1 Will layout data like this: disk0 disk1 disk2 disk3 A A B B C C D D E E F F You have removed disk0 and disk1, so A,C,E don't exist any more. You should get IO errors when you try to access that data. There is nothing that can be recovered, so the drives remain as spares. 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
