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Viewing System Configuration with ioscan

1-12 Peripherals Configuration (R1001H) HP-UX version 11.00.01

Card Instances and Device Files

Card instance number and hardware path elements map directly into the device

special file as card instance, target number, and device number. For example, the

disk device special file /dev/dsk/c1t3d0 refers to instance one of the logical

SCSI manger (lsm), target disk with SCSI ID 3, and logical unit number (lun) of 0.

Typically, the card instance maps as the digit after the letter c (or for terminals, the

number after tty).

Note, the card instance designated in the device special file refers to the interface

card, not to the instance number of the peripheral device attached to the card. The

card instance number is unique only for the specific class (for example, ext_bus)

of interface. Thus, for example, the tty class of interface has its own sequence of

card instance numbers, beginning with zero, which appear in its device files.

Decoding Device Special Files with lssf

Use the lssf command to decode device special files, as in the following

Continuum Series 400 example:

# lssf /dev/lan

streams cloneable pseudo driver dlpi /dev/lan

Finding Device Special Files

You can use ioscan -fn (or -fkn or -fun) to show device special file names

associated with a peripheral. You can also add other ioscan options (such as -H,

-C, -d, or -I) to limit your output to specific elements in your configuration.

The example in Figure 1-5, using -C disk, shows the device files available for the

disk class, as well as the location and type of disk device.

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Seagate ST118273WC Guía de usuario Pagina 28