Check if network drive is mounted in a timely manner

Ulisha

2/14/24, 5:42 PM

I have a network drive mounted through cifs with the following configuracion in fstab:

/ip/drive /local_path cifs username=username,password=password,acl,rw 0 0

I need to know as soon as possible if the network drive is offline / not accessible.

Currently, i have a separate service running ls command periodically on the mounted path and checking if command gives a network error, but the moment the drive comes offline, ls command takes about 3 minutes to fail.

I could run the command with a timeout (timeout 10 ls /local_path) but is there a better way to know if the drive is down without waiting for ls command to fail?

0 + 4

fstab

cifs

20.04

popey

2/14/24, 5:47 PM

You could reduce the 3 minutes with the addition of the `x-systemd.device-timeout=10s` option in your fstab after the `rw`. Choose some value for the time out which is suitable. You could also script just checking for the existence of a file, rather than a full `ls`. A few lines of bash could just `test /localpath/lost+found` for example, to see if it's there quickly.

Rinzwind

2/14/24, 6:14 PM

doing it using inotify / udev would be quicker (ie. real time). But i do agree with popey: checking for the existance of 1 file or a directory should be enough. The mount command itself can tell you if something is mounted too. also possible:put it into a systemd unit and then you can have it remount on failure.

steeldriver

2/14/24, 6:46 PM

I wonder if the `mountpoint` command would be useful here?

Ulisha

2/15/24, 8:25 AM

@popey Funly enough, I tried to check for the existence of a specific file before trying the ls command. Ubuntu tels me the file exists even when the network drive is down. I will be trying the x-systemd.device-timeout next.

Elon Musk

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EN: Check if network drive is mounted in a timely manner

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