Created attachment 482503 [details]
vdsm.log

As of RHEL 6.1, mke2fs has a default of discard=enabled. Creating new storage domain on a storage that doesn't support discard now fails with the following errors. We should disable discard on our side by using "mke2fs -K".

I'll test this on RHEL 6.0 to see whether the default there is already discard=enabled. I'll update this bug when I have new info.

Thread-4576::DEBUG::2011-03-03 11:47:20,433::blockSD::913::Storage.Misc.excCmd::(_cr
eateVMSfs) FAILED: <err> = 'Warning: could not erase sector 2: Attempt to write bloc
k from filesystem resulted in short write\nWarning: could not read block 0: Attempt
to read block from filesystem resulted in short read\nWarning: could not erase secto
r 0: Attempt to write block from filesystem resulted in short write\n\nWarning, had
trouble writing out superblocks.'; <rc> = 1
Thread-4576::ERROR::2011-03-03 11:47:20,434::task::854::TaskManager.Task::(_setError
) Unexpected error
Traceback (most recent call last):
  File "/usr/share/vdsm/storage/task.py", line 862, in _run
    return fn(*args, **kargs)
  File "/usr/share/vdsm/storage/hsm.py", line 1199, in public_createStorageDomain
    domClass=domClass, typeSpecificArg=typeSpecificArg, version=domVersion)
  File "/usr/share/vdsm/storage/sdf.py", line 60, in create
    version=version)
  File "/usr/share/vdsm/storage/blockSD.py", line 286, in create
    _createVMSfs(os.path.join("/dev", vgName, MASTERLV))
  File "/usr/share/vdsm/storage/blockSD.py", line 915, in _createVMSfs
    raise se.MkfsError(dev)
MkfsError: Cannot create filesystem on device: ('/dev/3a135f20-612f-4bf4-8081-2e1fd4
767ea7/master',)