On 12 October 2011 09:22, huang jun <hjwsm1989@xxxxxxxxx> wrote: > 2011/10/12 Damien Churchill <damoxc@xxxxxxxxx>: >> On 12 October 2011 02:22, huang jun <hjwsm1989@xxxxxxxxx> wrote: >>> I use the UUID option to mount the btrfs disk,but i can not success. >>> first, the disk is /dev/sdd1 >>> then, i pull out the disk >>> and after mintues, pushed it again,at this time, it changes to /dev/sde1 >>> at this time, if we use /etc/init.d/ceph restart, it will failed, for >>> the current mount option is likely "/dev/sd** " >>> but the UUID didn't change. >>> why i can not mount it successfuly? >>> BTW, does ceph provides methods to resolve the condition like that? >>> >>> the starce file attached. >>> >>> thanks! >>> >> >> Hi, >> >> I switched to use the symlinks created by udev in /dev/disk/by-id/ >> which contains the hard-disks serial number which will be completely >> static, even if a new btrfs filesystem is created. This ensures that >> the same partition on the same disk is always used. >> >> Regards, >> Damien >> > can you mount successfully by using the /dev/disk/by-id/ instead of /dev/sd**? > and how to get the hard-disk serial number? I have tried "udevadm info > -a -p $(udevadm info -q path -n $btrfs_devs)", but failed to get it. > or you should test the condition like that, pull out the disk first > and then push it in after few minutes. > It's as simple as "ls -l /dev/disk/by-id". They point to the /dev/sd* devices so just pick the correct one, at least that's how I did it. Damien -- To unsubscribe from this list: send the line "unsubscribe ceph-devel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
