NedHere is the exact command used to create a raidz2 pool with 8+2 drives, followed by the error messages: mkfs.lustre --fsname=cajalfs --reformat --ost --backfstype=zfs --index=0 --mgsnode=10.10.101.171@o2ib lustre-ost0/ost0 raidz2 /dev/sda /dev/sdc /dev/sde /dev/sdg /dev/sdi /dev/sdk /dev/sdm /dev/sdo /dev/sdq /dev/sds mkfs.lustre FATAL: Invalid filesystem name /dev/sds mkfs.lustre FATAL: unable to prepare backend (22) mkfs.lustre: exiting with 22 (Invalid argument) dmesg shows ZFS: Loaded module v0.6.2-1, ZFS pool version 5000, ZFS filesystem version 5 Any suggestions on creating the pool separately?
Just make sure you can see /dev/sds in your system - if not, that's your problem.
I would also suggest consider building this without using these top level dev names. It is very easy for these to change accidentally. If you're just testing it's fine, but over time it will be a problem.
See http://zfsonlinux.org/faq.html#WhatDevNamesShouldIUseWhenCreatingMyPoolI like the vdev_id.conf with meaningful (to our sysadmins) aliases to device 'by-path'.
Scott
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