Sorry to not be precise enough here are the command and result i tried: # mdadm --re-add /dev/md0 /dev/sdb1 mdadm: --re-add for /dev/sdb1 to /dev/md0 is not possible # mdadm --add /dev/md0 /dev/sdb1 mdadm: /dev/sdb1 reports being an active member for /dev/md0, but a --re-add fails. mdadm: not performing --add as that would convert /dev/sdb1 in to a spare. mdadm: To make this a spare, use "mdadm --zero-superblock /dev/sdb1" first. Also i check my disk and seem ok : #smartcll -l selftest /dev/sdb1 === START OF READ SMART DATA SECTION === SMART Self-test log structure revision number 1 Num Test_Description Status Remaining LifeTime(hours) LBA_of_first_error # 1 Extended offline Completed without error 00% 14046 - # 2 Short offline Completed without error 00% 14041 - Thanks for helping me On Mon, Mar 31, 2014 at 10:28 AM, Mikael Abrahamsson <swmike@xxxxxxxxx> wrote: > On Mon, 31 Mar 2014, bobzer wrote: > >> so there i tried to re-add the disk that doesn't works > > > "Doesn't work" isn't a helpful problem description. Please provide output > from dmesg when you do this, error message (if any) from CLI, what command > you tried with, etc. > > -- > Mikael Abrahamsson email: swmike@xxxxxxxxx -- 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