Hi, I have multiple raid 1 devices on my system. recently i noticed read seek errors in /var/log/kern.log from /dev/hdi1 which is part of /dev/md1. I then did a lot of work with /dev/md1 and then i noticed that /dev/hdi1 failed in the /dev/md1 but the data was fine on remaining part of raid1. I then shut system down and then i put in another device to replace /dev/hdi1 and rebooted At this point of rebooting, i had forgotten to edit the contents of /etc/mdadm/mdadm.conf and it still had the line something like ARRAY /dev/md1 level=raid1 num-devices=2 \ UUID=d876333b:694e852b:e9a6f40f:0beb90f9 devices /dev/hdc1,/dev/hdi1 then i got an error from fsck on bootup as it reached /dev/md1 and dropped me into single user mode then i changed the mdadm.conf file to ARRAY /dev/md1 level=raid1 num-devices=2 UUID=d876333b:694e852b:e9a6f40f:0beb90f9 devices /dev/hdc1 and it booted fine. i then did mdadm /dev/md1 -a /dev/hdi1 to add in my new drive. Mdadm then began to recreate the array. and then, while the raid was in the process of rebuilding i did mdadm --detail --scan and the line read ARRAY /dev/md1 level=raid1 num-devices=2 spares=1 \ UUID=d876333b:694e852b:e9a6f40f:0beb90f9 devices /dev/hdc1,/dev/hdi1 so my question for the group is what is the meaning of spares=1? does it mean to indicate that the device is still rebuilding? On the other raid 1 devices on my system, such as /dev/md0 the mdadm --detail --scan says ARRAY /dev/md0 level=raid1 num-devices=2 UUID=d876333b:694e852b:e9a6f40f:0beb90f9 devices /dev/hda1,/dev/hdg1 without the spares=1 clause. The reason I ask is: What should I write into my new version of mdadm.conf? I am guessing I should write ARRAY /dev/md1 level=raid1 num-devices=2 UUID=d876333b:694e852b:e9a6f40f:0beb90f9 devices /dev/hdc1,/dev/hdi1 without the spares=1 thing. I am confused what spares=1 is for..... Thanks!!! Mitchell Laks - 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
