HP Hitachi Dynamic Link Manager Software - Manual (Page 139)

When a value of 2 or more is specified for the number of times an error
needs to occur, make sure that the condition shown in Setting Up the
Automatic Failback Function on page 3-72 is satisfied.
To determine whether a path is invalid for an automatic failback, you can use
the results of the dlnkmgr command's view operation.
• Setting up intermittent error monitoring by using the set operation
The following is an example of setting up intermittent error monitoring by
using a command:
>dlnkmgr set -iem on -intvl 20 -iemnum 2
on specifies that intermittent error monitoring is to be used. To disable
intermittent error monitoring, specify off. When you set this parameter
to on, you can specify intermittent error conditions by using the -intvl
and -iemnum parameters. Specify the monitoring interval for an
intermittent error in the -intvl parameter, and the number of times that
the error needs to occur in the -iemnum parameter. When these
parameters are omitted, the default values of 30 and 3 are used,
respectively.
Setting Up the LU Deletion Function
For details on the LU deletion function, see Deleting an LU Dynamically on
page 4-19 .
Table 3-15 LU Deletion Function Values on page 3-73 shows the possible
values for the LU deletion function.
Table 3-15 LU Deletion Function Values
Values in the set
operation
Description
off The LU is not removed from HDLM-management even if the error
occurs on all the paths to the LU, all the paths to the LU are
disconnected, or the LU is deleted. The status of the paths is
either Offline(E) or Online(E). This operation is equal to the
operation in HDLM 05-01 or earlier. The off option is
recommended when you do not want to use the LU deletion
function and you want the system to operate as it did in HDLM
05-01 and earlier.
on The LU is removed from HDLM-management when all the paths to
the LU are disconnected. However, if an Offline(C) path is
included in the disconnected paths, the LU is not deleted from
HDLM-management.
The deleted LU is restored when it is recovered from the physical
failure and the disk is re-scanned.
on -force The LU is removed from HDLM-management when all the paths to
the LU are disconnected, even when an Offline(C) path is
included.
Creating an HDLM Environment
3-73
Hitachi Dynamic Link Manager User Guide (for Windows(R))