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debugvmfs

NAME

debugvmfs - VMFS file system debugger

SYNOPSIS

debugvmfs VOLUME... COMMAND [ OPTIONS ]

DESCRIPTION

The debugvmfs program allows to display various informations about VMFS file systems, and to access data within the file systems.

The VOLUME to be opened can be either a block device or an image file. When the VMFS spreads accross several extents, all extents must be given.

Please note that most commands are still likely to change in future versions.

COMMANDS

cat file [ ... ]

Outputs the content of the given files from the VMFS.

ls [ -l ] path

Lists files contained at the given location within the VMFS.
With -l, gives some more information, much like the output from ls(1) when given the -l option.

df

Outputs information about file system size.

show_dirent file

Outputs directory entity information about the given file from the VMFS.

show_inode file

Outputs inode information about the given file from the VMFS.

show_file_blocks file

Outputs block_ids for the given file's content blocks.

show_fs

Outputs information about the file system.

show_volume

Outputs information about the physical and logical volumes.

show_vol_bitmaps

Outputs information about the volume bitmaps.

check_vol_bitmaps

Checks volume bitmaps consistency.

show_heartbeats

Outputs active heartbeats on the file system.

convert_block_id block_id [ ... ]

Outputs information about the given block_id, such as block type, entry and item numbers.

read_block block_id

Outputs content within the specified block_id.

show_bitmap_item block_id

Outputs raw content for the bitmap item corresponding to the given block_id.

shell

Starts an interactive session. All of the above commands can be executed from within the interactive session.
The following output redirections are supported within the shell:

•
cmd > output_file
Puts the output of cmd in the output_file file.

•
cmd >> output_file
Appends the output of cmd to the output_file file.

•
cmd | external command
Sends the output of cmd to the input of external command. The external command itself can contain output redirection.
Examples:

• read_block 0x00000681 | less

• cat /.fdc.sf | hexdump -C

• cat /.fdc.sf | hexdump -C > /tmp/fdc.hex

• cat /.fdc.sf | hexdump -C | less

AUTHORS

Christophe Fillot <m[blue]cf@utc.frm[][1]>, Mike Hommey <m[blue]mh@glandium.orgm[][2]>

SEE ALSO

vmfs-fuse(8)

NOTES

1.

cf@utc.fr

mailto:cf@utc.fr

2.

mh@glandium.org

mailto:mh@glandium.org