- 论坛徽章:
- 0
|
请教一个mount问题。
fsck -- check and repair filesystems (generic)
Synopsis
fsck [-F FSType] [-V] [-m] [special . . .]
fsck [-F FSType] [-V] [current_options] [-o specific_options] [special
. . .]
fsck [-F FSType] [-V] [-PLbyw] [special . . .]
Description
fsck audits and interactively repairs inconsistent conditions for
filesystems. If the filesystem is inconsistent the user is prompted
for concurrence before each correction is attempted. It should be
noted that some corrective actions will result in some loss of data.
The amount and severity of data loss may be determined from the
diagnostic output. The default action for each correction is to wait
for the user to respond yes or no.
The filesystem should be unmounted when fsck is used. If this is not
possible, care should be taken that the system is quiescent and that
it is rebooted immediately afterwards if the filesystem is a critical
one, for example root.
current_options are options supported by the s5-specific module of
fsck. Other FSTypes do not necessarily support these options.
specific_options indicate suboptions specified in a comma-separated
list of suboptions and/or keyword-attribute pairs for interpretation
by the FSType-specific module of the command.
special represents a block or character special device (for example,
/dev/rdsk/*, where the value of * is machine dependent). It is
preferable that a character special device be used. fsck will not work
on a block device if it is mounted. If special is not supplied, fsck
looks through /etc/vfstab and executes fsck for all character specials
in the ``fsckdev'' field of /etc/vfstab for which there is a numeric
entry in the ``fsckpass'' field.
Command options
-F
Specify the FSType on which to operate. If -F FSType is not
specified heuristics similiar to those used by fstyp(1M) are
used to determine the file system type.
__________________________________________________________
NOTE: This command executes faster if it is not required to
autodetect file system types. If you are uncertain about the
FSType, you can use the fstyp command to determine it.
__________________________________________________________
-V
Echo the complete command line, but do not execute the command.
The command line is generated by using the options and
arguments provided by the user and adding to them information
derived from /etc/vfstab. This option should be used to verify
and validate the command line.
-m
Check but do not repair. This option checks that the filesystem
is suitable for mounting.
-o
Specify FSType-specific options.
-P
Automatically audits and interactively repairs inconsistent
conditions for all filesystems in /etc/vfstab in parallel. It
uses the ``fsckpass'' field of /etc/vfstab to create a list of
filesystems that need checking on separate disks. The
filesystems are then scheduled for checking such that each disk
has one filesystem being checked on that disk at a given time.
-P supports the following suboptions:
-L
Requests that the ouput is arranged in order by
filesystem.
-b
Prints the filesystem output in a brief terse format. Upon
success, the command prints one line, per filesystem,
which is a summary of fsck information.
-y
Assumes a "yes" response to all questions, and the
interactive mode is circumvented.
-w
Averts confusion stemming from several different
filesystems requesting interactive responses. Runs as
expected upon success (either verbose or brief). If it
fails, the parent fsck process collects the failure
information, but defers any corrections until the rest of
the filesystems have been checked.
Files
/etc/vfstab
list of default parameters for each filesystem
References
fsck_bfs(1M), fsck_dosfs(1M), fsck_s5(1M), fsck_sfs(1M), fsck_ufs(1M),
fsck_vxfs(1M), fstyp(1M), mkfs(1M), vfstab(4)
Notices
This command may not be supported for all filesystem types.
This command has been updated to handle files greater than 2GB.
_________________________________________________________________
?2002 Caldera International, Inc. All rights reserved.
UnixWare 7 Release 7.1.3 - 30 October 2002 |
|
免费注册
发表于 2004-05-09 14:41
