[Lustre-discuss] ldiskfs for MDT and zfs for OSTs?

[Anjana Kar]

Is it possible to configure the MDT as ldiskfs and the OSTs with zfs
in lustre 2.4? The server is running a lustre kernel on a Centos 6.4
system, has both lustre-osd-ldiskfs and lustre-osd-zfs rpms installed.
The MDT is up as ldiskfs, but get an error trying to configure the ost:

mkfs.lustre --fsname=lustrefs --reformat --ost --backfstype=zfs .....

mkfs.lustre FATAL: unable to prepare backend (22)
mkfs.lustre: exiting with 22 (Invalid argument)

Thanks,
-Anjana Kar