aboutsummaryrefslogtreecommitdiffstats
path: root/Documentation/device-mapper/dm-raid.txt
diff options
context:
space:
mode:
authorJonathan Brassow <jbrassow@redhat.com>2011-08-02 07:32:07 -0400
committerAlasdair G Kergon <agk@redhat.com>2011-08-02 07:32:07 -0400
commitc1084561bb85da3630540ebe951749a8cd8fc714 (patch)
treeecdefcf24dd88f4c19a873fa5d26039a0edf03a7 /Documentation/device-mapper/dm-raid.txt
parentc0a2fa1ef1057a1e9450d6f055f1cde2ad4f85a2 (diff)
dm raid: add region_size parameter
Allow the user to specify the region_size. Ensures that the supplied value meets md's constraints, viz. the number of regions does not exceed 2^21. Signed-off-by: Jonathan Brassow <jbrassow@redhat.com> Signed-off-by: Alasdair G Kergon <agk@redhat.com>
Diffstat (limited to 'Documentation/device-mapper/dm-raid.txt')
-rw-r--r--Documentation/device-mapper/dm-raid.txt4
1 files changed, 4 insertions, 0 deletions
diff --git a/Documentation/device-mapper/dm-raid.txt b/Documentation/device-mapper/dm-raid.txt
index 4f9dd3cecc11..be4419a30781 100644
--- a/Documentation/device-mapper/dm-raid.txt
+++ b/Documentation/device-mapper/dm-raid.txt
@@ -52,6 +52,10 @@ The target is named "raid" and it accepts the following parameters:
52 [max_recovery_rate <kB/sec/disk>] Throttle RAID initialization 52 [max_recovery_rate <kB/sec/disk>] Throttle RAID initialization
53 [max_write_behind <sectors>] See '-write-behind=' (man mdadm) 53 [max_write_behind <sectors>] See '-write-behind=' (man mdadm)
54 [stripe_cache <sectors>] Stripe cache size (higher RAIDs only) 54 [stripe_cache <sectors>] Stripe cache size (higher RAIDs only)
55 [region_size <sectors>]
56 The region_size multiplied by the number of regions is the
57 logical size of the array. The bitmap records the device
58 synchronisation state for each region.
55 59
56<#raid_devs>: The number of devices composing the array. 60<#raid_devs>: The number of devices composing the array.
57 Each device consists of two entries. The first is the device 61 Each device consists of two entries. The first is the device