восстановить файловую систему XFS (repair an XFS filesystem)
DIRTY LOGS
Due to the design of the XFS log, a dirty log can only be
replayed by the kernel, on a machine having the same CPU
architecture as the machine which was writing to the log.
xfs_repair cannot replay a dirty log and will exit with a status
code of 2 when it detects a dirty log.
In this situation, the log can be replayed by mounting and
immediately unmounting the filesystem on the same class of
machine that crashed. Please make sure that the machine's
hardware is reliable before replaying to avoid compounding the
problems.
If mounting fails, the log can be erased by running xfs_repair
with the -L option. All metadata updates in progress at the time
of the crash will be lost, which may cause significant filesystem
damage. This should only be used as a last resort.
