DUMPLFS(8) BSD System Manager's Manual DUMPLFS(8)NAME
dumplfs -- dump file system information
SYNOPSIS
dumplfs [-adiS] [-b blkno] [-I blkno] [-s segno] filesys | device
DESCRIPTION
dumplfs prints out the file system layout information for the LFS file system or special device specified. The listing is very long and
detailed. This command is useful mostly for finding out certain file system information such as the file system block size.
The following flags are interpreted by dumplfs.
-a Dump the contents of all superblocks, not just the first. Superblocks appear in the dumplfs output with the segment containing them.
-b Use the block specified immediately after the flag as the super block for the filesystem.
-d Check partial segment data checksums and report mismatches. This makes dumplfs operate much more slowly.
-I Use the block specified immediately after the flag as the inode block containing the index file inode.
-i Dump information about the inode free list.
-S Dump information about the segment table.
-s Add the segment number immediately following the flag to a list of segments to dump. This flag may be specified more than once to
dump more than one segment. The default is to dump all segments.
SEE ALSO disktab(5), fs(5), disklabel(8), newfs_lfs(8)HISTORY
The dumplfs command appeared in 4.4BSD.
BSD June 13, 2000 BSD
Check Out this Related Man Page
FFSINFO(8) BSD System Manager's Manual FFSINFO(8)NAME
ffsinfo -- dump all meta information of an existing ufs file system
SYNOPSIS
ffsinfo [-g cylinder_group] [-i inode] [-l level] [-o outfile] special | file
DESCRIPTION
The ffsinfo utility extends the dumpfs(8) utility.
The output is appended to the file outfile. Also expect the output file to be rather large. Up to 2 percent of the size of the specified
file system is not uncommon.
The following options are available:
-g cylinder_group
This restricts the dump to information about this cylinder group only. Here 0 means the first cylinder group and -1 the last one.
-i inode
This restricts the dump to information about this particular inode only. Here the minimum acceptable inode is 2. If this option is
omitted but a cylinder group is defined then only inodes within that cylinder group are dumped.
-l level
The level of detail which will be dumped. This value defaults to 255 and is the ``bitwise or'' of the following table:
0x001 initial superblock
0x002 superblock copies in each cylinder group
0x004 cylinder group summary in initial cylinder group
0x008 cylinder group information
0x010 inode allocation bitmap
0x020 fragment allocation bitmap
0x040 cluster maps and summary
0x100 inode information
0x200 indirect block dump
-o outfile
This sets the output filename where the dump is written to, and must be specified. If - is provided, output will be sent to stdout.
EXAMPLES
ffsinfo -o /var/tmp/ffsinfo -l 1023 /dev/vinum/testvol
will dump /dev/vinum/testvol to /var/tmp/ffsinfo with all available information.
SEE ALSO disklabel(8), dumpfs(8), fsck(8), growfs(8), gvinum(8), newfs(8), tunefs(8)HISTORY
The ffsinfo utility first appeared in FreeBSD 4.4.
AUTHORS
Christoph Herrmann <chm@FreeBSD.org>
Thomas-Henning von Kamptz <tomsoft@FreeBSD.org>
The GROWFS team <growfs@Tomsoft.COM>
BUGS
Snapshots are handled like plain files. They should get their own level to provide for independent control of the amount of what gets
dumped. It probably also makes sense to some extend to dump the snapshot as a file system.
BSD September 8, 2000 BSD
Can anybody tell me please how to use the "dump" command in Linux command.
dump -0u /destination /sourcefile or device file.
Please correct me.
-regards
-Iftikhar (1 Reply)
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Hi,
do you know, is there any thing like Linux From Scratch, but for a BSD operating system?
A tutorial or guide to learn (and build) the system inside out? Would be pretty cool IMO. :D
Blackbird (1 Reply)
Hi all
I have a query about dump device in aix, i asked this question on interview.
what is dump device, how to add dump device & its work.
kindly give this answer,
thanks in advance.
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Hi, i'd like to know the command line to create a dump file from a non particular table, o database. I'm working with RedHat environment.
Ayn idea would be helpful.
Thanks. (3 Replies)