Note: "permalinks" may not be as permanent as we would like,
direct links of old sources may well be a few messages off.
I'm able to shrink a DRBD block device:
root at nfsb3:~# dd if=/dev/zero of=/dev/md0 bs=1M
dd: writing `/dev/md0': No space left on device
2001+0 records in
2000+0 records out
2097152000 bytes transferred in 80.382527 seconds (26089650 bytes/sec)
root at nfsb3:~# /etc/init.d/drbd start
Starting DRBD resources: [ d0 s0 n0 ].
root at nfsb3:~# drbdsetup /dev/drbd0 resize -d 1500M
root at nfsb3:~#
drbd0: Creating state block
drbd0: resync bitmap: bits=479232 words=14976
drbd0: size = 1872 MB (1916928 KB)
^^^^^^^
drbd0: 1916928 KB now marked out-of-sync by on disk bit-map.
drbd0: Assuming that all blocks are out of sync (aka FullSync)
drbd0: 1916928 KB now marked out-of-sync by on disk bit-map.
drbd0: drbdsetup [5104]: cstate Unconfigured --> StandAlone
drbd0: drbdsetup [5117]: cstate StandAlone --> Unconnected
drbd0: drbd0_receiver [5118]: cstate Unconnected --> WFConnection
drbd0: resync bitmap: bits=384000 words=12000
drbd0: size = 1500 MB (1536000 KB)
^^^^^^^
drbd0: 1536000 KB now marked out-of-sync by on disk bit-map.
But I'm not able to resize it up:
root at nfsb3:~# drbdsetup /dev/drbd0 resize -d 1600M
root at nfsb3:~# ^^^^^
drbd0: Requested disk size is too big (1638400 > 1536000)
I don't think it's normal.
--
Cyril Bouthors
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