Hitachi Dynamic Link Manager Software Users Guide for AIX (6.6) (T5208-96010, April 2011)

2. HDLM Functions

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.

Note

Depending on the HBA, you need to repeat steps 2 and 3.

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 6.7 view (Displays Information).

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 6.7 view (Displays Information).

(3) 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.

In order to use the automatic failback function, HDLM must already be monitoring

error recovery on a regular basis.

When using the Thunder 9500V series, or Hitachi AMS/WMS series, HDLM will

select the next path to be used first from among the online owner paths, and then from

the online non-owner paths. As a result, if an owner path recovers from an error, and