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There isn't much to say here :-) Where do I find information regarding the format used in the file /proc/mounts?

My current guess is the following (delimited by a single space):

DEVICE PATH FILESYSTEM FLAGS_DELIMITED_BY_COMMAS ??? ??? 

I'm rather puzzled about the last two '???', though. Help is very appreciated...

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up vote 3 down vote accepted

The format is the same as in /etc/fstab. The information for /etc/fstab can be found by man fstab or on this page.

It says:

The fifth field, (fs_freq), is used for these filesystems by the dump(8) command to determine which filesystems need to be dumped. If the fifth field is not present, a value of zero is returned and dump will assume that the filesystem does not need to be dumped.

The sixth field, (fs_passno), is used by the fsck(8) program to determine the order in which filesystem checks are done at reboot time. The root filesystem should be specified with a fs_passno of 1, and other filesystems should have a fs_passno of 2. Filesystems within a drive will be checked sequentially, but filesystems on different drives will be checked at the same time to utilize parallelism available in the hardware. If the sixth field is not present or zero, a value of zero is returned and fsck will assume that the filesystem does not need to be checked.

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