Hi! Well, I'm wondering if I did something wrong after replacing probably faulty disk by a fresh new one. The new disk just hangs on the same controller on the same cable and is identical to the replaced one. I switched on power. The raid still was working (in degraded mode). I used fdisk to partitionate the new disk (/dev/hdg) and create a partition (/dev/hdg1) with the fd-flag. After that I tried to add the new disk by this command: mdadm /dev/md0 --add /dev/hdg1 That's how /proc/mdstat looks like now: =====snip============================================================ thismaschine:~ # cat /proc/mdstat Personalities : [raid5] read_ahead 1024 sectors md0 : active raid5 hdg1[4] hdh1[3] hdf1[1] hde1[0] 480214656 blocks level 5, 128k chunk, algorithm 2 [4/3] [UU_U] [==================>..] recovery = 90.8% (145491784/160071552) finish=21.4min speed=11336K/sec unused devices: <none> ====snap============================================================== Strange is, that the new disk didn't get place 2 in the array. What went wrong? Do I have to repair this? How can I repair this? How do I have to modify my raidtab (see below)? I'd be very thankful for helping me, after I tried the howto, the faq and searched this mailinglist. Ciao, Simon Frettloeh =====snip============================================================= # autogenerated /etc/raidtab by YaST2 raiddev /dev/md0 raid-level 5 nr-raid-disks 4 nr-spare-disks 0 persistent-superblock 1 parity-algorithm left-symmetric chunk-size 128 device /dev/hde1 raid-disk 0 device /dev/hdf1 raid-disk 1 device /dev/hdg1 raid-disk 2 device /dev/hdh1 raid-disk 3 =====snap============================================================= - To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html