ncheck_vxfs(ADM)

Synopsis

Description

Some options accept a range as a value. A range consists of a single number, or two numbers seperated by a "-", indicating an inclusive range of values. If "-" is specified and the first number is omitted, 0 is assumed. If the second number is omitted, the end of the file system is assumed.

Names of directory files are followed by slash dot (/.).

Options

-F vxfs

Specify the vxfs file system type. If -F vxfs is not specified heuristics similiar to those used by fstyp(ADM) are used to determine the file system type.

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This command executes faster if it is not required to autodetect file system types. If possible, specify -F vxfs

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generic_options

Supported by the generic ncheck command (see ncheck(ADM)).

-i ilist

Limits the report to the files on the ilist that follows. The ilist must be separated by commas without spaces.

-a

Allow printing of the names "." and ".." (dot and dot dot), which are ordinarily suppressed.

-s

Report only on special files and regular files with set-user-ID mode. This option may be used to detect violations of security policy.

-o specific_options

Specifies options specific to the VxFS file system type. specific_options is a list of suboptions and/or keyword/attribute pairs intended for the VxFS-specific module of the command.

The available options are

m

Print mode information (used in conjunction with -i option).

b=block

Print pathname containing file system block number block.

sector=sector_range

Report on all inodes containing or referencing the sector(s) in sector_range. The output includes the inode number, fileset index of the inode, sector(s) contained and the pathname or inode type. Inodes searched include structural inodes and attribute inodes, so a pathname is only generated when the sector is contained by a file. If the sector is not contained in any file, the inode type is printed as "<free>". Multiple -o sector= options accumulate.

block=block_range

Print information on all inodes containing or referencing block numbers in the range specified. The output format is the same as that for -o sector=, but the units used are file system blocks rather than sectors.

surface[=sector_range]

Perform a surface analysis. If a sector_range is specified perform a surface analysis only for that range. All the sector are read and if the read of a sector fails, its sector number is printed. If any bad sectors are found, ncheck treats the list of bad sector as input to the -o sector=# option and produces a list of containing or referencing inodes.

Examples

ncheck -F vxfs -osector=20-35 /dev/vx/rdsk/vol1 

Same as above but report on all inodes or file system structures referencing any sector in the file system /dev/vx/rdsk/vol1:

ncheck -F vxfs -osector= /dev/vx/rdsk/vol1

Diagnostics

References