Remount a QNAP NAS RAID volume

Where a NAS gets shut down unexpectedly
it should automatically complete a file system check

Remount a QNAP NAS RAID volume

Following a file system check, where a RAID volume is not remounted automatically after a reboot is it necessary to run the file system check multiple times?

A message may appear in the event log ‘file system not clean’ or ‘system not shut down correctly’. This often follows a power outage or surge, and it is not uncommon for one or more of the RAID volumes not to mount.

Where a NAS gets shut down unexpectedly, it should automatically complete a file system check. However if this doesn’t work it will be necessary to run a diagnostic assessment. The QNAP NAS boxes run a custom Linux setup based on Ubuntu.

Firstly run mdadm to assess the status of the RAID. This will indicate the following:

Version
Creation Time
Raid Level
Array Siz
Used Dev Size
Raid Devices
Total Devices
Preferred Minor
Persistence
Update Time
State
Active Devices
Working Devices
Failed Devices
Spare Devices
Layout
Chunk Size

Secondly check the filesystem for errors # e2fsck_64 -fp /dev/md0. Assuming the volumes still exist using the df -h command, run a manual file system check and repair. This may take a long time and it’s important not to rush the process. Once completed attempt to remount the device # mount -t ext4 /dev/md1 /share/MD1_DATA. If this fails, a RAID reconstruction is the next option.

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Remount a QNAP NAS RAID volume