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| author | NeilBrown <neilb@suse.de> | 2009-11-17 13:08:55 +1100 |
|---|---|---|
| committer | NeilBrown <neilb@suse.de> | 2009-11-17 13:08:55 +1100 |
| commit | 5f175898dedb2bb2635d4d1dcb2afa8c420d5eae (patch) | |
| tree | 8da1e54dcedb1584b8227124375d7d73b650dc1d /mdadm.8 | |
| parent | df0d4ea04e34fc5d499056b00fa1e0a25f21453e (diff) | |
| download | mdadm-5f175898dedb2bb2635d4d1dcb2afa8c420d5eae.tar.gz mdadm-5f175898dedb2bb2635d4d1dcb2afa8c420d5eae.tar.xz mdadm-5f175898dedb2bb2635d4d1dcb2afa8c420d5eae.zip | |
Increase default chunk size to 512K
This seems more appropriate for current (and recent) model drives than
64K.
64K is still the default for '--build' as changing that could corrupt
data.
64K is also the default rounding for 'linear' on kernels older than
2.6.16.
Signed-off-by: NeilBrown <neilb@suse.de>
Diffstat (limited to 'mdadm.8')
| -rw-r--r-- | mdadm.8 | 7 |
1 files changed, 5 insertions, 2 deletions
@@ -440,7 +440,9 @@ before the number of devices in the array is reduced. .TP .BR \-c ", " \-\-chunk= -Specify chunk size of kibibytes. The default is 64. +Specify chunk size of kibibytes. The default when creating an +array is 512KB. To ensure compatibility with earlier versions, the +default when Building and array with no persistent metadata is 64KB. This is only meaningful for RAID0, RAID4, RAID5, RAID6, and RAID10. .TP @@ -450,7 +452,8 @@ component will be rounded down to a multiple of this size. This is a synonym for .B \-\-chunk but highlights the different meaning for Linear as compared to other -RAID levels. +RAID levels. The default is 64K if a kernel earlier than 2.6.16 is in +use, and is 0K (i.e. no rounding) in later kernels. .TP .BR \-l ", " \-\-level= |