diff options
Diffstat (limited to 'sys-utils/fallocate.1')
| -rw-r--r-- | sys-utils/fallocate.1 | 13 |
1 files changed, 6 insertions, 7 deletions
diff --git a/sys-utils/fallocate.1 b/sys-utils/fallocate.1 index 8f862ab61..ec84ce7c6 100644 --- a/sys-utils/fallocate.1 +++ b/sys-utils/fallocate.1 @@ -44,15 +44,14 @@ blocks past EOF, which can be removed with a truncate. .IP "\fB\-p, \-\-punch-hole\fP" Punch holes in the file, the range should not exceed the length of the file. .IP "\fB\-d, \-\-dig-holes\fP" -Detect and dig holes of, at least, \fIlength\fR size. If \fIlength\fR is not -specified, it defaults to 32k. Makes the file sparse in-place, without using -extra disk space. You can think of this as doing a "\fBcp --sparse\fP" and -renaming the dest file as the original, without the need for extra disk space. +Detect and dig holes. Makes the file sparse in-place, without using extra disk +space. The minimal size of the hole depends on filesystem I/O block size +(usually 4096 bytes). Also, when using this option, \fI\-\-keep-size\fP is +implied. .PP .IP -Note that too small values for \fIlength\fR might be ignored. And too big values -might use lot of RAM and not detect many holes. Also, when using this option, -\fI\-\-keep-size\fP is implied. +You can think of this as doing a "\fBcp --sparse\fP" and +renaming the dest file as the original, without the need for extra disk space. .IP "\fB\-o, \-\-offset\fP \fIoffset\fP Specifies the beginning offset of the allocation, in bytes. .IP "\fB\-l, \-\-length\fP \fIlength\fP |