additional sanity checks

[unix-history] / usr / src / sbin / fsck / fsck.8

diff --git a/usr/src/sbin/fsck/fsck.8 b/usr/src/sbin/fsck/fsck.8
index 1fe7af4..b282b7b 100644 (file)
--- a/usr/src/sbin/fsck/fsck.8
+++ b/usr/src/sbin/fsck/fsck.8
@@ -2,7 +2,7 @@
 .\" All rights reserved.  The Berkeley software License Agreement
 .\" specifies the terms and conditions for redistribution.
 .\"
 .\" All rights reserved.  The Berkeley software License Agreement
 .\" specifies the terms and conditions for redistribution.
 .\"

-.\"    @(#)fsck.8      6.6 (Berkeley) %G%
+.\"    @(#)fsck.8      6.8 (Berkeley) %G%

 .\"
 .TH FSCK 8 ""
 .UC 4
 .\"
 .TH FSCK 8 ""
 .UC 4


@@ -42,21 +42,20 @@ preens a standard set of filesystems or the specified file systems.
 It is normally used in the script
 .B /etc/rc
 during automatic reboot.
 It is normally used in the script
 .B /etc/rc
 during automatic reboot.

-In this case
+Here

 .I fsck
 reads the table
 .B /etc/fstab
 to determine which file systems to check.
 .I fsck
 reads the table
 .B /etc/fstab
 to determine which file systems to check.

-It uses the information there to inspect groups of disks in parallel, taking
-maximum advantage of i/o overlap to check the file systems
-as quickly as possible.
-Normally, the root file system will be checked on pass 1, other
-``root'' (``a'' partition) file systems on pass 2, other
-small file systems on separate passes (e.g. the ``d'' file systems
-on pass 3 and the ``e'' file systems on pass 4), and finally
-the large user file systems on the last pass, e.g. pass 5.

 Only partitions in fstab that are mounted ``rw,'' ``rq'' or ``ro''
 and that have non-zero pass number are checked.
 Only partitions in fstab that are mounted ``rw,'' ``rq'' or ``ro''
 and that have non-zero pass number are checked.

+Filesystems with pass number 1 (normally just the root filesystem)
+are checked one at a time.
+When pass 1 completes, all remaining filesystems are checked,
+running one process per disk drive.
+The disk drive containing each filesystem is inferred from the longest prefix
+of the device name that ends in a digit; the remaining characters are assumed
+to be the partition designator.

 .PP
 The system takes care that only a restricted class of innocuous
 inconsistencies can happen unless hardware or software failures intervene.
 .PP
 The system takes care that only a restricted class of innocuous
 inconsistencies can happen unless hardware or software failures intervene.


@@ -94,9 +93,9 @@ and the percentage of fragmentation.
 If sent a QUIT signal,
 .I fsck
 will finish the file system checks, then exit with an abnormal
 If sent a QUIT signal,
 .I fsck
 will finish the file system checks, then exit with an abnormal

-return status that causes the automatic reboot to fail.
-This is useful when you wish to finish the file system checks,
-but do not want the machine to come up multiuser.
+return status that causes an automatic reboot to fail.
+This is useful when to finish the file system checks during an automatic reboot,
+but do not want the machine to come up multiuser after the checks complete.

 .PP
 Without the
 .B \-p
 .PP
 Without the
 .B \-p


@@ -132,6 +131,13 @@ Use the block specified immediately after the flag as
 the super block for the file system.  Block 32 is usually
 an alternate super block.
 .TP 6
 the super block for the file system.  Block 32 is usually
 an alternate super block.
 .TP 6

+.B \-l
+Limit the number of parallel checks to the number specified in the following
+argument.
+By default, the limit is the number of disks, running one process per disk.
+If a smaller limit is given, the disks are checked round-robin, one filesystem
+at a time.
+.TP 6

 .B \-m
 Use the mode specified in octal immediately after the flag as the
 permission bits to use when creating the lost+found directory
 .B \-m
 Use the mode specified in octal immediately after the flag as the
 permission bits to use when creating the lost+found directory


@@ -234,6 +240,9 @@ File pointing to unallocated inode.
 .br
 Inode number out of range.
 .br
 .br
 Inode number out of range.
 .br

+Dot or dot-dot not the first two entries of a directory
+or having the wrong inode number.
+.br

 .br
 .ns
 .TP 6
 .br
 .ns
 .TP 6


@@ -268,7 +277,8 @@ If the
 directory does not exist, it is created.
 If there is insufficient space its size is increased.
 .PP
 directory does not exist, it is created.
 If there is insufficient space its size is increased.
 .PP

-Checking the raw device is almost always faster.
+Because of inconsistencies between the block device and the buffer cache,
+the raw device should always be used.

 .SH FILES
 .br
 .ns
 .SH FILES
 .br
 .ns


@@ -286,7 +296,4 @@ fs(5),
 fsdb(8),
 newfs(8),
 mkfs(8),
 fsdb(8),
 newfs(8),
 mkfs(8),

-crash(8V),

 reboot(8)
 reboot(8)

-.SH BUGS
-There should be some way to start a \fBfsck \-p\fR at pass \fIn\fR.