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HP Hitachi Dynamic Link Manager Software User Manual

Page 53

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2. HDLM Functions

31

Offline(C)

.

All the paths connected to an LU have been determined to have an

intermittent error.

The processing of continuous I/O operations issued to an LU is successful.

#3

This path is deleted when the AIX

chdev

command is executed on an hdisk

where an

Online

or

Offline(E)

path exists. To restore the deleted path,

remove the cause of the error and then execute the AIX

mkdev -l

hdisk-name

or

cfgmgr

command.

#4

When an

Online

or

Offline(E)

path exists among the paths that access the

same LU.

#5

One of the

Offline(E)

paths is changed to the

Online(E)

path.

#6

When an

Offline(E)

path exists among the paths that access the same LU.

The last available online path for each LU cannot be placed offline by executing the

offline

operation. This ensures access to the LU. For details on the

offline

operation, see 6.4 offline (Places Paths Offline).
If an error occurs in the last available online path for each LU, the status of the path is

changed to

Online(E)

.

If you are using automatic failback, when the path recovers from an error, HDLM

automatically places the path online.
When you are using intermittent error monitoring, the path in which the intermittent

error occurred is not automatically placed online when the path recovers from the error.

In such a case, place the path online manually.
Note

If there is a path failure immediately after a path is taken offline by using either

the an HDLM command, the status might change from

Offline(C)

to

Offline(E)

. If an offline operation was just performed, wait about 2 minutes,

check the path status by using an HDLM command, and then make sure that the

status has changed to

Offline(C)

. If it is still

Offline(E)

, retry the offline

operation.