some backups failing
There are a few instances whose backups appear to be failing with:
2018-09-03T16:00:22.824Z 889 TID-owf2hgb2g BackupWorker JID-d84255c66a278d7afe5ad51c INFO: Performing mount command for instance XXXX
2018-09-03T16:00:22.877Z 9815 TID-orxtkgnus BackupWorker JID-0ae2e423a9641022771822df INFO: NTFS signature is missing.
Failed to mount '/dev/sda': Invalid argument
The device '/dev/sda' doesn't seem to have a valid NTFS.
Maybe the wrong device is used? Or the whole disk instead of a
partition (e.g. /dev/sda, not /dev/sda1)? Or the other way around?
/cc @namhokim @arihantar