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 �Co �C “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 �Chl ”
I find “/dev/sdb4 885G 2.7M 885G 1% /data/osd1” (it’s right?)
so when re-insert the disk ,” fdisk �Cl“ 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
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