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Explain how the passno field in /etc/fstab works with fsck

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and quotacheck in some more detail.
This commit is contained in:
Mike Pritchard 2008-01-26 13:03:35 +00:00
parent a502340a03
commit 5338828a37
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=175681
1 changed files with 24 additions and 3 deletions
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27
share/man/man5/fstab.5
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@ -188,13 +188,25 @@ is used by the
.Xr fsck 8
and
.Xr quotacheck 8
programs to determine the order in which file system checks are done
at reboot time.
programs to determine the order in which file system and quota
checks are done at reboot time.
The
.Fa fs_passno
field can be any value between 0 and
.Ql INT_MAX Ns -1 .
.Pp
The root file system should be specified with a
.Fa fs_passno
of 1, and other file systems should have a
.Fa fs_passno
of 2.
of 2 or greater.
A file system with a
.Fa fs_passno
value of 1 is always checked sequentially and be completed before
another file system is processed, and it will be processed before
all file systems with a larger
.Fa fs_passno .
.Pp
File systems within a drive will be checked sequentially,
but file systems on different drives will be checked at the
same time to utilize parallelism available in the hardware.
@ -204,6 +216,14 @@ a value of zero is returned and
and
.Xr quotacheck 8
will assume that the file system does not need to be checked.
.Pp
The
.Fa fs_passno
field can be used to implement finer control when
the system utilities may determine that the file system resides
on a different physical device, when it actually does not, as with a
.Xr ccd 4
device.
.Bd -literal
#define FSTAB_RW "rw" /* read/write device */
#define FSTAB_RQ "rq" /* read/write with quotas */
@ -241,6 +261,7 @@ resides in
.Sh SEE ALSO
.Xr getfsent 3 ,
.Xr getvfsbyname 3 ,
.Xr ccd 4 ,
.Xr dump 8 ,
.Xr fsck 8 ,
.Xr mount 8 ,