From the looks of the fdisk output, it seems that the disk was not recognized by the OS when it was reinserted? The OSD daemon won't be able to start if the disk is not found. -Sam On 03/16/2011 05:08 PM, huang jun wrote: > Hi， > Recently, I try to do “adding/removing osds ” in ceph wiki > Here is what I ave done > <1> build a cluster with mon/mds/osd0 in the same machine “host0” > And start it,everything is ok > <2> follow the wiki ceph ,add a disk (/dev/sdb4)into host0 > It’s ok ,”ceph osd dump ?o ? “show that there are two osds and > state are in/up > <3> write a 4G file > pull out the osd1 when it about writes 2G ,the osd1 was marked down > and 5 mins laster > it was marked out,but use “df ?hl ” > I find “/dev/sdb4 885G 2.7M 885G 1% /data/osd1” (it’s right?) > so when re-insert the disk ,” fdisk ?l“ show me: > > Disk /dev/sda: 1000.2 GB, 1000204886016 bytes > 255 heads, 63 sectors/track, 121601 cylinders > Units = cylinders of 16065 * 512 = 8225280 bytes > Disk identifier: 0x000d6542 > Device Boot Start End Blocks Id System > /dev/sda1 * 1 3263 26210016 83 Linux > /dev/sda2 3264 6134 23061307+ f W95 Ext'd (LBA) > /dev/sda3 6135 121601 927488677+ 83 Linux > /dev/sda5 3264 4307 8385898+ 82 Linux swap / Solaris > /dev/sda6 4308 5612 10482381 83 Linux > /dev/sda7 5613 6134 4192933+ 83 Linux > > Disk /dev/sdc: 1000.2 GB, 1000204886016 bytes > 255 heads, 63 sectors/track, 121601 cylinders > Units = cylinders of 16065 * 512 = 8225280 bytes > Disk identifier: 0x000549cb > Device Boot Start End Blocks Id System > /dev/sdc1 * 1 3263 26210016 83 Linux > /dev/sdc2 3264 6134 23061307+ f W95 Ext'd (LBA) > /dev/sdc4 6135 121601 927488677+ 83 Linux > /dev/sdc5 3264 4307 8385898+ 82 Linux swap / Solaris > /dev/sdc6 4308 5612 10482381 83 Linux > /dev/sdc7 5613 6134 4192933+ 83 Linux > > And finally I can not start osd1 > Because “/etc/init.d/ceph start osd1 ” do nothing > Where is my problem?can you find it out for me? > thanks > -- > 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 -- 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
