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| author | kib <kib@FreeBSD.org> | 2010-12-29 12:31:18 +0000 |
|---|---|---|
| committer | kib <kib@FreeBSD.org> | 2010-12-29 12:31:18 +0000 |
| commit | d69a17ac0a884f83a0d321fb56d071796e6a1568 (patch) | |
| tree | 8ab612371e7500ee1c3bac44a09208490c294417 /sbin/newfs/newfs.8 | |
| parent | 17dccd1898b6a0ddd49fcd77d7314ddc494cbac8 (diff) | |
| download | FreeBSD-src-d69a17ac0a884f83a0d321fb56d071796e6a1568.zip FreeBSD-src-d69a17ac0a884f83a0d321fb56d071796e6a1568.tar.gz | |
Add support for FS_TRIM to user-mode UFS utilities.
Reviewed by: mckusick, pjd, pho
Tested by: pho
MFC after: 1 month
Diffstat (limited to 'sbin/newfs/newfs.8')
| -rw-r--r-- | sbin/newfs/newfs.8 | 12 |
1 files changed, 10 insertions, 2 deletions
diff --git a/sbin/newfs/newfs.8 b/sbin/newfs/newfs.8 index 10631f9..b542739 100644 --- a/sbin/newfs/newfs.8 +++ b/sbin/newfs/newfs.8 @@ -28,7 +28,7 @@ .\" @(#)newfs.8 8.6 (Berkeley) 5/3/95 .\" $FreeBSD$ .\" -.Dd September 14, 2010 +.Dd December 9, 2010 .Dt NEWFS 8 .Os .Sh NAME @@ -36,7 +36,7 @@ .Nd construct a new UFS1/UFS2 file system .Sh SYNOPSIS .Nm -.Op Fl EJNUln +.Op Fl EJNUlnt .Op Fl L Ar volname .Op Fl O Ar filesystem-type .Op Fl S Ar sector-size @@ -241,6 +241,14 @@ A valid .Ar size value cannot be larger than the default one, which means that the file system cannot extend into the reserved space. +.It Fl t +Turn on the TRIM enable flag. +If enabled, and if the underlying device supports the BIO_DELETE +command, the file system will send a delete request to the underlying +device for each freed block. +The trim enable flag is typically set when the underlying device +uses flash-memory as the device can use the delete command to +pre-zero or at least avoid copying blocks that have been deleted. .El .Pp The following options override the standard sizes for the disk geometry. |
