HP-UX Reference (11i v2 04/09) - 1M System Administration Commands A-M (vol 3)

f
fsck_vxfs(1M) fsck_vxfs(1M)
NAME
fsck_vxfs: fsck - check and repair a VxFS file system
SYNOPSIS
fsck [-F vxfs][-V
][-mnNpPsyY][-pP][-o p][special ... ]
fsck [-F vxfs][-V
][-mnNpPsyY][-o full,mounted,nolog
][special ... ]
DESCRIPTION
fsck checks VxFS file systems for consistency. Because VxFS records pending file system updates in an
intent log, fsck typically replays the intent log instead of doing a full structural file system check. You
can use options (-o full or
-y) to force a full structural file system check.
special specifies one or more special character devices, for example,
/dev/rdsk/c1t0d0
.
If multiple devices are specified, each device is checked in turn unless the
-P option or the -o p subop-
tion is also specified, in which case the devices are checked in parallel. If special is not specified,
fsck
prompts you with each file system listed in
/etc/fstab to determine which file system to check, unless
you specify
-y or -Y, to automatically answer yes to the prompts.
Options
fsck recognizes the following options:
-F vxfs Specify the VxFS file system type.
-m Check whether or not the file system is marked clean. This option does not validate the
file system. The file system could have been corrupted since it was marked clean (for
example, by a system crash), and if so, a mount could fail. In that case, a full
fsck
would be required to clean it. Use fsck -n to test for file system corruption.
-n|-N Assume a "no" response to all prompts by fsck
; do not open the file system for writing,
do not replay the intent log. A full file system check is performed.
-o specific_options
Specify VxFS file system specific options. See the subsection The -o Specific Options
below.
-p Produce messages that identify the device being checked.
-P With VxFS, -P is used by fsck by default; it does not provide any functionality.
-s Safe performance mode. To improve performance, a system wide sync() will not be
issued (see sync(2)).
-V Echo the completed command line, but do not execute the command. The command line
is generated by incorporating the user specified options and other information derived
from /etc/fstab. This option allows the user to verify the command line.
-y|-Y Assume a "yes" response to all prompts by fsck. Additionally, if the file system requires
a full file system check after the log replay, or if the nolog suboption causes the log
replay to be skipped and the file system is not clean, then a full file system check is per-
formed.
Because VxFS maintains an intent log, a complete check is generally not required; the default is to replay
the intent log only. If
fsck_vxfs detects file system damage or the log replay operation detects dam-
age, an indication that a complete check is required is placed in the super-block. In this case, if the -y
option was specified, the full check will be run after the log replay. If the -y option was not used, fsck
must be run again, with the -o full option to perform the full structural check.
Operands
fsck recognizes the following operand:
special Name of one or more special character devices which contain VxFS file systems.
The -o Specific Options
The -o option specifies VxFS file system specific options. These options can be a combination of the fol-
lowing in a comma-separated list:
full Perform a full file system check.
Section 1M−−226 Hewlett-Packard Company − 1 − HP-UX 11i Version 2: September 2004