[dm-devel] [PATCH] multipath-tools: add ALUA info to README.md

[Xose Vazquez Perez]

Cc: Martin Wilck <mwilck at suse.com>
Cc: Benjamin Marzinski <bmarzins at redhat.com>
Cc: Christophe Varoqui <christophe.varoqui at opensvc.com>
Cc: DM-DEVEL ML <dm-devel at redhat.com>
Signed-off-by: Xose Vazquez Perez <xose.vazquez at gmail.com>
---
 README.md | 28 ++++++++++++++++++++++++++++
 1 file changed, 28 insertions(+)

diff --git a/README.md b/README.md
index dcf51f20..2322082c 100644
--- a/README.md
+++ b/README.md
@@ -146,3 +146,31 @@ The multipath-tools source code is covered by several different licences.
 Refer to the individual source files for details.
 Source files which do not specify a licence are shipped under LGPL-2.0
 (see `LICENSES/LGPL-2.0`).
+
+
+ALUA
+====
+This is a rough guide, consult your storage device manufacturer documentation.
+
+ALUA is supported in some devices, but usually it's disabled by default.
+To enable ALUA, the following options should be changed:
+
+- EMC CLARiiON/VNX:
+   "Failover Mode" should be changed to "4" or "Active-Active mode(ALUA)-failover mode 4"
+
+- HPE 3PAR, Primera, and Alletra 9000:
+   "Host:" should be changed to "Generic-ALUA Persona 2 (UARepLun, SESLun, ALUA)".
+
+- Promise VTrak/Vess:
+   "LUN Affinity" and "ALUA" should be changed to "Enable", "Redundancy Type"
+   must be "Active-Active".
+
+- LSI/Engenio/NetApp RDAC class, as NetApp SANtricity E/EF Series and OEM arrays:
+   "Select operating system:" should be changed to "Linux DM-MP (Kernel 3.10 or later)".
+
+- NetApp ONTAP:
+   To check ALUA state: "igroup show -v <igroup_name>", and to enable ALUA:
+   "igroup set <igroup_name> alua yes".
+
+- Huawei OceanStor:
+   "Host Access Mode" should be changed to "Asymmetric".
-- 
2.37.1