Automatic Failbacks - Hitachi XP P9500 User Manual

b
.
c
.
Note
For details on the position of slots, see the manual of the host.
CHA port number
The port number of the CHA.
You can check this number by using the dlnkmgr command's view
operation. For details on the view operation, see
Information) on page
AutoPATH_ID
The ID assigned to a path. This ID is re-assigned each time the host or
the HDLM Manager is started.
You can check this ID by using the dlnkmgr command's view operation.
For details on the view operation, see
page

Automatic failbacks

When a path recovers from an error, HDLM can automatically place the
recovered path back online. This function is called the automatic failback
function.
000002 hdisk2 00000 9500V.0051.0020
000003 hdisk0 00001 9500V.0051.0005
000004 hdisk1 00001 9500V.0051.0015
000005 hdisk2 00001 9500V.0051.0020
Execute the following command to find the parent device of hdisk
(the HBA device instance).
# lsdev -C -l hdisk4 -F 'parent'
fscsi0
Execute the following command to find the physical location code,
based on the HBA device instance.
# lscfg -vp -l fscsi0
The obtained physical location code is in the Uaa.bb-Pcc-Idd format.
The first letters, Uaa.bb, depend on the model of the host. HDLM
selects the path with the lowest value for aabbccdd. When the
physical location code is in another format, the priority of paths is not
decided. Note that the top priority path does not change because of,
for example, restarting a computer in the same environment.
Depending on the HBA, you need to repeat steps 2 and 3.
6-30.
6-30.
HDLM Functions
Hitachi Dynamic Link Manager User Guide (for AIX(R))
view (Displays
view (Displays Information) on
2-17