Installation guide

Logical Hardware Configuration

5-20 Fault Tolerant System Administration (R1004H) HP-UX version 11.00.03

Figure 5-5 shows a system with a Eurologic disk enclosure, dual-initiated SCSI

buses (14/0/0 and 14/0/1), 14 disk drives and four PSUs on those buses, and

the single-initiated SCSI buses (14/0/2 and 14/0/3).

Figure 5-5. SCSI Device Paths with Eurologic Disk Enclosures S

Mapping Logical Addresses to Device Files

Device file names use the following convention:

/dev/type/cxtydz

type indicates the device type, and x, y, and z correspond to numbers in the

hardware path of the device. Storage devices use the following conventions:

■ For disk and CD-ROM devices, type is dsk, x is the instance number of the

SCSI bus on which the disk is connected, y is the SCSI target ID, and z is the

LUN of the disk or CD-ROM.

■ For tape devices, type is rmt, and the remaining numbers are the same as for

disk and CD-ROM devices. Tape device file names can include additional

letters at the end that specify the operational characteristics of the device. See

the mt(7) man page for more information. (The /dev/rmt directory also

includes standard tape device files, for example 0m and 0mb, that do not

identify a specific device as part of the file name.)

Main System Bus

Card-Cage 2

14/0/0

U501Card

SCSI

Card-Cage 3

U501 Card

SCSI

14/0/2

14/0/3

Slot

PSU

0/14

14/0/1

PSU

0/14

PSU