There is an issue when releasing a file striped with DoM after an hsm_restore.
1) create a file with a 1st component on MDT:
lfs setstripe -E 1M -L mdt -E -1 -S 4M -c -1 /mnt/lustre/domfile
2) archive and release the file (requires HSM set up)
lfs hsm_archive /mnt/lustre/domfile
# (wait for archive to complete)
3) restore the file
lfs hsm_restore /mnt/lustre/domfile
# or cat /mnt/lustre/domfile
4) release the file => FAILS
lfs hsm_release /mnt/lustre/domfile
Cannot send HSM request (use of /mnt/lustre/domfile): Device or resource busy
It may be something wrong with the data version stored in hsm EA.