Does DRBD support copying disks with existing file systems?
I find it failed
root@node51:~# drbdadm create-md r0
initializing activity log
initializing bitmap (32 KB) to all zero
Writing meta data...
New drbd meta data block successfully created.
root@node51:~# drbdadm up r0
1: Failure: (104) Can not open backing device.
Command 'drbdsetup attach 1 /dev/sdb /dev/sdc flexible' terminated with exit code 10
root@node51:~#
Does DRBD support copying disks with existing file systems?
There was a mention about this at the mailing list: You may experiment with that:
https://lists.linbit.com/pipermail/drbd-user/2009-February/011464.html
This is advanced usage. Better try that in a lab environment first.
For me that would be too complicated and unsure if it really will work. I’d rather create a new DRBD-Device and copy the data onto it.
Thank you, but this method requires too many changes to the original file system and is also very complex to operate overall.
DRBD need remount disk and filesystem，this has a significant impact on the running status of the application.
mount /dev/drbdX /some.mountpoint
If DRBD can run in bypass mode and be transparent to the original disk, that would be great!