HP Hitachi Dynamic Link Manager Software User Manual

Page 310

4. HDLM Operation

288

When using VxVM, execute the following command to confirm that the

DEVICE

column of the LUs being managed by HDLM is displayed in the

format (for example,

c6t0d10s2

# vxdisk list

If the value is displayed in the

Z format, perform the following

procedures:
1.

Delete the

/etc/vx/disk.info

file.

Restart the host, or restart the VxVM configuration daemon by executing the

following command:

# vxconfigd -k

If the logical device file before re-creation might remain in the

/dev/dsk

and

dev/rdsk

directories, you must delete the logical device file before re-creation.

Delete the logical device file before its re-creation, and then follow the

instructions in (1) Changing the Configuration of a System that Uses HDLM.

The logical device file names of HDLM devices on each LU are determined by using

the path (physical device file name corresponding to the sd or ssd device) that can be

obtained by using the following procedure:
To obtain the path to an LU:
1.

Obtain the instance number of the HDLM driver corresponding to the LU.
Execute the following command to display the minor number of the HDLM

device of the desired LU (HDLM device on slice

). The value obtained by

dividing the displayed minor number by

is the instance number of HDLM.

# /usr/bin/ls -lL HDLM-logical-device-file-name-on-slice-0

The following shows an example of executing the command.
This example obtains the instance number of the HDLM driver of the LU whose

logical device file name is

/dev/dsk/c4t21d0s0

. In this case, since the minor

number is

, the instance number is

Obtain path information from the instance number of the HDLM driver.