ffsinfo(8) manual page

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 file ... 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.

“	"I liken starting one's computing career with Unix, say as an undergraduate, to being born in East Africa. It is intolerably hot, your body is covered with lice and flies, you are malnourished and you suffer from numerous curable diseases. But, as far as young East Africans can tell, this is simply the natural condition and they live within it. By the time they find out differently, it is too late. They already think that the writing of shell scripts is a natural act."	”
— Ken Pier, Xerox PARC

Manual Pages — FFSINFO

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CONTENTS

SYNOPSIS

DESCRIPTION

EXAMPLES

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HISTORY

AUTHORS

BUGS

-g cylinder_group
	This restricts the dump to information about this cylinder group only. Here file ... 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.