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Correct the location of the first backup superblock in fsck_ffs.8.

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Make a note in the newfs.8 manual page to update the first backup
superblock location when changing the default fragment size for
the filesystem.

Reported by:  O. Hartmann
This commit is contained in:
Kirk McKusick 2019-08-07 16:56:00 +00:00
parent b0927a31dd
commit 47d3e2f83b
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=350682
2 changed files with 7 additions and 1 deletions
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2
sbin/fsck_ffs/fsck_ffs.8
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@ -153,7 +153,7 @@ exits without attempting any further cleaning.
Use the block specified immediately after the flag as
the super block for the file system.
An alternate super block is usually located at block 32 for UFS1,
and block 160 for UFS2.
and block 192 for UFS2.
.Pp
See the
.Fl N

6
sbin/newfs/newfs.8
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@ -111,6 +111,9 @@ for more details on how to set this option.
.It Fl b Ar block-size
The block size of the file system, in bytes.
It must be a power of 2.
.\" If changing the default block size and it causes the default
.\" fragment size to change, be sure to update the location of
.\" the first backup superblock on the fsck_ffs.8 manual page.
The
default size is 32768 bytes, and the smallest allowable size is 4096 bytes.
The optimal block:fragment ratio is 8:1.
@ -143,6 +146,9 @@ ranging in value between
.Ar blocksize Ns /8
and
.Ar blocksize .
.\" If changing the default fragment size or it changes because of a
.\" change to the default block size, be sure to update the location
.\" of the first backup superblock on the fsck_ffs.8 manual page.
The default is 4096 bytes.
.It Fl g Ar avgfilesize
The expected average file size for the file system.