diff options
Diffstat (limited to 'sbin/newfs/newfs.8')
| -rw-r--r-- | sbin/newfs/newfs.8 | 30 |
1 files changed, 21 insertions, 9 deletions
diff --git a/sbin/newfs/newfs.8 b/sbin/newfs/newfs.8 index e39f590f57a..dc2cd4a53bd 100644 --- a/sbin/newfs/newfs.8 +++ b/sbin/newfs/newfs.8 @@ -1,4 +1,4 @@ -.\" $OpenBSD: newfs.8,v 1.69 2011/03/31 11:17:58 sthen Exp $ +.\" $OpenBSD: newfs.8,v 1.70 2011/05/23 10:56:17 dcoppa Exp $ .\" $NetBSD: newfs.8,v 1.12 1995/03/18 14:58:41 cgd Exp $ .\" .\" Copyright (c) 1983, 1987, 1991, 1993, 1994 @@ -30,7 +30,7 @@ .\" .\" @(#)newfs.8 8.3 (Berkeley) 3/27/94 .\" -.Dd $Mdocdate: March 31 2011 $ +.Dd $Mdocdate: May 23 2011 $ .Dt NEWFS 8 .Os .Sh NAME @@ -218,6 +218,13 @@ With this option, will not print extraneous information like superblock backups. .It Fl S Ar sector-size The size of a sector in bytes (almost always 512). +Alternatively +.Ar sector-size +may instead use a multiplier, as documented in +.Xr scan_scaled 3 . +.Ar sector-size +should be 512 or a multiple of it because the kernel operates +512\-byte blocks internally. A sector is the smallest addressable unit on the physical device. Changing this is useful only when using .Nm @@ -227,14 +234,19 @@ created (for example on a write-once disk). Note that changing this from its default will make it impossible for .Xr fsck 8 -to find the alternate superblocks if the standard superblock is -lost. +to find the alternate superblocks automatically if the standard +superblock is lost. .It Fl s Ar size -The size of the file system in sectors. -This value is multiplied by the number of 512\-byte blocks in a sector -to yield the size of the file system in 512\-byte blocks, which is the value -used by the kernel. -The maximum size of an FFS file system is 2,147,483,647 (2^31 \- 1) of these +The size of the file system in sectors (see +.Fl S ) . +Alternatively +.Ar size +may instead use a multiplier, as documented in +.Xr scan_scaled 3 , +to specify size in bytes; in this case +.Ar size +is rounded up to the next sector boundary. +The maximum size of an FFS file system is 2,147,483,647 (2^31 \- 1) of 512\-byte blocks, slightly less than 1 TB. FFS2 file systems can be as large as 64 PB. Note however that for |