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-rw-r--r--Documentation/device-mapper/dm-raid.txt12
1 files changed, 6 insertions, 6 deletions
diff --git a/Documentation/device-mapper/dm-raid.txt b/Documentation/device-mapper/dm-raid.txt
index a7d1c4abc927..2a8c11331d2d 100644
--- a/Documentation/device-mapper/dm-raid.txt
+++ b/Documentation/device-mapper/dm-raid.txt
@@ -11,6 +11,7 @@ The target is named "raid" and it accepts the following parameters:
<#raid_devs> <metadata_dev0> <dev0> [.. <metadata_devN> <devN>]
<raid_type>:
+ raid1 RAID1 mirroring
raid4 RAID4 dedicated parity disk
raid5_la RAID5 left asymmetric
- rotating parity 0 with data continuation
@@ -61,8 +62,7 @@ The target is named "raid" and it accepts the following parameters:
<#raid_devs>: The number of devices composing the array.
Each device consists of two entries. The first is the device
containing the metadata (if any); the second is the one containing the
- data. Currently, separate metadata devices are not supported and '-'
- is required in place of the metadata device.
+ data.
If a drive has failed or is missing at creation time, a '-' can be
given for both the metadata and data drives for a given position.
@@ -70,7 +70,7 @@ The target is named "raid" and it accepts the following parameters:
Example tables
--------------
-# RAID4 - 4 data drives, 1 parity
+# RAID4 - 4 data drives, 1 parity (no metadata devices)
# No metadata devices specified to hold superblock/bitmap info
# Chunk size of 1MiB
# (Lines separated for easy reading)
@@ -79,13 +79,13 @@ Example tables
raid4 1 2048 \
5 - 8:17 - 8:33 - 8:49 - 8:65 - 8:81
-# RAID4 - 4 data drives, 1 parity (no metadata devices)
+# RAID4 - 4 data drives, 1 parity (with metadata devices)
# Chunk size of 1MiB, force RAID initialization,
# min recovery rate at 20 kiB/sec/disk
0 1960893648 raid \
- raid4 4 2048 min_recovery_rate 20 sync\
- 5 - 8:17 - 8:33 - 8:49 - 8:65 - 8:81
+ raid4 4 2048 sync min_recovery_rate 20 \
+ 5 8:17 8:18 8:33 8:34 8:49 8:50 8:65 8:66 8:81 8:82
'dmsetup table' displays the table used to construct the mapping.
The optional parameters are always printed in the order listed