Hitachi Dynamic Link Manager Software Users Guide for Linux (6.6) (HIT5203-96005, November 2011)

Table 2-5 Example of Using the Logical Device File Name of the Device

Used When the Application Accesses the LU

Host status Device file name that the application uses

Before installing HDLM The application uses the logical device file name for the

SCSI device.

Example:

sda

sdb

After installing HDLM The application uses the logical device file name for the

HDLM device.

Example:

sddlmaa

The logical device file name of an HDLM device has the following format:

/dev/sddlm[aa-pap][1-15]

About alphabetic letters used in the logical device file name:

For the first 256 LUs, two alphabetic letters are assigned. The

specifiable values for the first two characters are in the range from a

to p.

For the 257th and subsequent LUs, three alphabetic letters are

assigned. The specifiable values for the first and third characters are

in the range from a to p. The value of the second character is always

A major number is required for each of the first characters.

Figure 2-6 About Alphabetic Letters Used in the Logical Device File Name on

page 2-13

shows information about alphabetic letters used in the logical

device file name.

2-12

HDLM Functions

Hitachi Dynamic Link Manager User Guide (for Linux(R))