VERITAS Storage Foundation 4.1 Cross-Platform Data Sharing Administrator's Guide

Chapter 4, File System Considerations
Converting a File System
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8. If a failure occurs during the conversion, the failure could be one of the following cases:
◆ System failure.
◆ fscdsconv failure due to program defect or abnormal termination resulting from user
actions.
In either case, the file system being converted is no longer in a state in which it can be mounted
or accessed by normal means through other VxFS utilities. To recover the file system, invoke
the fscdsconv command with the recovery flag, -r:
# fscdsconv -r -f recovery_file special
When the -r flag is specified, fscdsconv expects the recovery file to exist and that the file
system being converted is the same file system specified in this second invocation of
fscdsconv.
9. After invoking fscdsconv with the -r flag, the conversion process will restart and
complete, given no subsequent failures. In the event of another failure, repeat step 8.
Under some circumstances, you will be required to restore the file system from the backup
created in step 3, such as if the disk fails that contains the recovery file. Failure to have created
a backup would then result in total data loss in the file system. I/O errors on the device that
holds the file system would also require a backup to be restored after the physical device
problems are addressed. There may be other causes of failure that would require the use of the
backup.