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| author | Jan Kara <jack@suse.cz> | 2021-01-21 18:26:25 -0500 |
|---|---|---|
| committer | Theodore Ts'o <tytso@mit.edu> | 2021-01-21 18:26:25 -0500 |
| commit | 33b0356c353feaef32fdcf300d39d2d2ef08ef1f (patch) | |
| tree | aa1a01dd6beccb2ace5be61985ee0d09a4877fed | |
| parent | 4d108756a4f185a48b366045fcfd0bc01a665bf2 (diff) | |
| download | e2fsprogs-33b0356c353feaef32fdcf300d39d2d2ef08ef1f.tar.gz | |
mke2fs.8: Improve valid block size documentation
Explain which valid block sizes mke2fs supports in more detail.
Reviewed-by: Andreas Dilger <adilger@dilger.ca>
Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
| -rw-r--r-- | misc/mke2fs.8.in | 10 |
1 files changed, 6 insertions, 4 deletions
diff --git a/misc/mke2fs.8.in b/misc/mke2fs.8.in index e6bfc6d6f..171315b14 100644 --- a/misc/mke2fs.8.in +++ b/misc/mke2fs.8.in @@ -207,12 +207,14 @@ manual page for more details. .SH OPTIONS .TP .BI \-b " block-size" -Specify the size of blocks in bytes. Valid block-size values are 1024, -2048 and 4096 bytes per block. If omitted, -block-size is heuristically determined by the filesystem size and +Specify the size of blocks in bytes. Valid block-size values are powers of two +from 1024 up to 65536 (however note that the kernel is able to mount only +filesystems with block-size smaller or equal to the system page size - 4k on +x86 systems, upto 64k on ppc64 or aarch64 depending on kernel configuration). +If omitted, block-size is heuristically determined by the filesystem size and the expected usage of the filesystem (see the .B \-T -option). If +option). In most common cases, the default block size is 4k. If .I block-size is preceded by a negative sign ('-'), then .B mke2fs |