HP XP P9500 Storage - Manual (Page 143)

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 Dynamic I/O Path Control
To prevent degrading of I/O performance, this function dynamically switches
the output controllers for HDLM, following the switching of controllers
performed by the storage system.
The dynamic I/O path control function can be set for each storage system or
LU. The checking interval for reviewing the switching status information can
also be set in order to properly follow the switching of controllers performed
by the storage system.
The following is an example of setting the dynamic I/O path control function:
dlnkmgr set -dpc on -pathid 000001 -lu
dlnkmgr set -dpcintvl 10
Specify "on" to enable the dynamic I/O path control function, or "off" to
disable the function. For the -pathid parameter, specify an LU, or the ID of a
path connected to the storage system. For the -dpcintvl parameter, specify
the checking interval (in minutes) for reviewing the information about the
switching of controllers performed by the storage system.
Setting Up the LU Deletion Function
For details on the LU deletion function, see Deleting an LU Dynamically on
page 4-19 .
The following table lists values and descriptions 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
Creating an HDLM Environment
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