Hitachi Dynamic Link Manager Software Users Guide for VMWare

To enable intermittent error monitoring, specify on. To disable intermittent

error monitoring, specify off. When you specify on, you can use the -intvl

and -iemnum parameters to specify intermittent error conditions (the

conditions used by the system to determine whether an intermittent error is

occurring). In the -intvl parameter, specify the monitoring interval for an

intermittent error. In the -iemnum parameter, specify the number of times

that the error is to occur. If these parameters are omitted and 3 or more

errors occur within 30 minutes, HDLM assumes that an intermittent error is

occurring.

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 -s host-name -u user-name -p password set -dpc on -pathid

000001 -lu

dlnkmgr -s host-name -u user-name -p password 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 Audit Log Data Collection

If you want to collect audit log data, you must also specify the collection level

for audit log data and the audit log categories.

The table below lists and describes the values for the audit log collection level

setting. An audit log data collection level is a severity level. The default is 6.

Table 3-5 Values Indicating Audit Log Data Collection Levels

Value (severity) Explanation

0 Error-level audit log data is collected.

4 Error-level and Warning-level audit log data is

collected.

3-18

Creating an HDLM Environment

Hitachi Dynamic Link Manager (for VMware®) User Guide