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System Administration Guide, Volume I

Tips and Tricks

Use the following tips to help you manage disks more efficiently.

Debugging format Sessions

Invoke format -M to enable extended and diagnostic messages for using the format utility with SCSI devices only.

In this example, the series of numbers below Inquiry: represent the hexadecimal value of the inquiry data displayed to the right of the numbers.


# format -M
Searching for disks...done
AVAILABLE DISK SELECTIONS:
       0. c0t3d0 <SUN0535 cyl 1866 alt 2 hd 7 sec 80>
/iommu@f,e0000000/sbus@f,e0001000/espdma@f,400000/esp@f,800000/sd@3,0
 
Specify disk (enter its number): 0
selecting c0t3d0
[disk formatted]
format> inquiry
Inquiry:
00 00 02 02 27 00 00 12 43 4f 4e 4e 45 52 20 20   ....'...CONNER 
43 50 33 30 35 34 30 20 20 53 55 4e 30 35 33 35   CP30540  SUN0535
42 30 42 42 39 33 30 38 46 39 30                  B0BB9308F90
Vendor:   CONNER 
Product:  CP30540  SUN0535
Revision: B0BB
format>

Label Multiple Disks by Using the prtvtoc and fmthard Commands

Use the prtvtoc and fmthard commands to label multiple disks with the same disk geometry.

Use this for loop in a script to copy a disk label from one disk and replicate it on multiple disks.


# for i in x y z
> do
> prtvtoc /dev/rdsk/cwtxdysz | fmthard -s - /dev/rdsk/cwt${i}d0s2
> done

Example--Labeling Multiple Disks

In this example, the disk label from c2t0d0s0 is copied to four other disks.


# for i in 1 2 3 5
> do
> prtvtoc /dev/rdsk/c2t0d0s0 | fmthard -s - /dev/rdsk/c2t${i}d0s2
> done
fmthard:  New volume table of contents now in place.
fmthard:  New volume table of contents now in place.
fmthard:  New volume table of contents now in place.
fmthard:  New volume table of contents now in place.
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