*hi again, I can boot from the disk 2, if disk 1 is remove logically ( by command mdadm --manage /dev/md0 --remove /dev/sda1)* * If I remove the disk ( physically from the machine), it doen't work.
here the output of mdstat , we see that we have just /dev/sdb it is working, but the disk one is physically attached.** and without removing physically the disk from the machine.* cat /proc/mdstat Personalities : [raid1] md1 : active raid1 sdb2[1] 58617784 blocks super 1.2 [2/1] [_U] md0 : active raid1 sdb1[1] 19529656 blocks super 1.2 [2/1] [_U] unused devices: <none> * In the BIOS setup the disk 2 is always declared slave ( may be it simulate and IDE conf). BIOS problem?? any idea thanks a lot best regards bela*