System Administration Guide, Volume I

Examples--Identifying the Disks on a System

The following format output is from a system with two disks.

# format
Searching for disks...done
AVAILABLE DISK SELECTIONS:
       0. c0t1d0 <SUN1.05 cyl 2036 alt 2 hd 14 sec 72>
          /iommu@f,e0000000/sbus@f,e0001000/espdma@f,400000/esp@f,800000/sd@1,0
       1. c0t3d0 <SUN1.05 cyl 2036 alt 2 hd 14 sec 72>
          /iommu@f,e0000000/sbus@f,e0001000/espdma@f,400000/esp@f,800000/sd@3,0
Specify disk (enter its number):

The format output associates a disk's physical and local device name to the disk's marketing name which appears in brackets <>. This is an easy way to identify which local device names represent the disks connected to your system. See Chapter 20, Accessing Devices (Overview) for a description of local and physical device names.

The following example uses a wildcard to display the disks connected to a second controller.

# format /dev/rdsk/c2*
AVAILABLE DISK SELECTIONS:
   0. /dev/rdsk/c2t0d0s0 <SUN2.1G cyl 2733 alt 2 hd 19 sec 80>
      /io-unit@f,e0200000/sbi@0,0/QLGC,isp@2,10000/sd@0,0
   1. /dev/rdsk/c2t1d0s0 <SUN2.1G cyl 2733 alt 2 hd 19 sec 80>
      /io-unit@f,e0200000/sbi@0,0/QLGC,isp@2,10000/sd@1,0
   2. /dev/rdsk/c2t2d0s0 <SUN2.1G cyl 2733 alt 2 hd 19 sec 80>
      /io-unit@f,e0200000/sbi@0,0/QLGC,isp@2,10000/sd@2,0
   3. /dev/rdsk/c2t3d0s0 <SUN2.1G cyl 2733 alt 2 hd 19 sec 80>
      /io-unit@f,e0200000/sbi@0,0/QLGC,isp@2,10000/sd@3,0
   4. /dev/rdsk/c2t5d0s0 <SUN2.1G cyl 2733 alt 2 hd 19 sec 80>
      /io-unit@f,e0200000/sbi@0,0/QLGC,isp@2,10000/sd@5,0
Specify disk (enter its number):

The following example identifies the disks on a SPARC based system.

# format
AVAILABLE DISK SELECTIONS:
       0. c0t3d0 <SUN2.1G cyl 2733 alt 2 hd 19 sec 80>
          /iommu@0,10000000/sbus@0,10001000/espdma@5,8400000/esp@5,8800000/sd@3,0
Specify disk (enter its number):

The format output identifies that disk 0 (target 3) is connected to the first SCSI host adapter (espdma@...), which is connected to the first SBus device (sbus@0...). The output also associates both the physical and logical device name to the disk's marketing name, SUN02.1G.

The following example identifies the disks on an x86 based system.

# format
Searching for disks...done
AVAILABLE DISK SELECTIONS:
       0. c0t0d0 <DEFAULT cyl 507 alt 2 hd 64 sec 32>
          /eisa/dpt@5c88,0/cmdk@0,0
       1. c0t3d0 <DEFAULT cyl 1852 alt 2 hd 15 sec 74>
          /eisa/dpt@5c88,0/cmdk@3,0
Specify disk (enter its number):

The format output identifies that disk 0, target 0 (cmdk@0,0) is connected to the first DPT host adapter (dpt@5...), which is connected to the EISA device (eisa). The format output on an x86 based system does not identify disks by their marketing names.