[lvm-devel] master - man page (lvcreate): Better explain stripes option for RAID 4/5/6.
Jonathan Brassow
jbrassow at fedoraproject.org
Fri Nov 30 23:01:36 UTC 2012
Gitweb: http://git.fedorahosted.org/git/?p=lvm2.git;a=commitdiff;h=83978cdec8aa6f6b6af2cb8937d64cc16b88cf18
Commit: 83978cdec8aa6f6b6af2cb8937d64cc16b88cf18
Parent: ed9751d9fa6638e0cae5aa38727f971eeac6516c
Author: Jonathan Brassow <jbrassow at redhat.com>
AuthorDate: Fri Nov 30 16:47:02 2012 -0600
Committer: Jonathan Brassow <jbrassow at redhat.com>
CommitterDate: Fri Nov 30 16:47:02 2012 -0600
man page (lvcreate): Better explain stripes option for RAID 4/5/6.
Do a better job explaining the '--stripes/-i' option to lvcreate
when it comes to RAID 4/5/6. The extra devices needed for parity
are implicitly added to the argument given. So a 5-device RAID6
logical volume is created with '-i 3' - indicating 3 stripes plus
the implicit 2 devices needed for RAID6.
---
man/lvcreate.8.in | 6 +++++-
1 files changed, 5 insertions(+), 1 deletions(-)
diff --git a/man/lvcreate.8.in b/man/lvcreate.8.in
index 705ebae..da4c1fe 100644
--- a/man/lvcreate.8.in
+++ b/man/lvcreate.8.in
@@ -150,7 +150,11 @@ Default is \fIpassdown\fP.
.BR \-i ", " \-\-stripes " " \fIStripes
Gives the number of stripes.
This is equal to the number of physical volumes to scatter
-the logical volume.
+the logical volume. When creating a RAID 4/5/6 logical volume,
+the extra devices which are necessary for parity are
+internally accounted for. Specifying '\-i 3' would use 3 devices
+for striped logical volumes, 4 devices for RAID 4/5, and 5 devices
+for RAID 6.
.TP
.BR \-I ", " \-\-stripesize " " \fIStripeSize
Gives the number of kilobytes for the granularity of the stripes.
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