System Administration Guide, Volume I

How to Identify a Defective Sector by Using Surface Analysis

Become superuser.

Unmount the file system in the slice that contains the defective sector.

See mount(1M) for more information.
# umount /dev/dsk/device-name

Enter the format utility by typing format.
# format

Select the affected disk.

Specify disk (enter its number):1
selecting c0t2d0:
[disk formatted]
Warning: Current Disk has mounted partitions.

Enter the analyze menu by typing analyze at the format> prompt.
format> analyze

Set up the analysis parameters by typing setup at the analyze> prompt. Use the parameters shown here:

analyze> setup
Analyze entire disk [no]? n
Enter starting block number [0, 0/0/0]: 12330
Enter ending block number [584159, 1216/9/47]: 12360
Loop continuously [no]? y
Repair defective blocks [yes]? n
Stop after first error [no]? n
Use random bit patterns [no]? n
Enter number of blocks per transfer [31, 0/0/31]: 1
Verify media after formatting [yes]? y
Enable extended messages [no]? n
Restore defect list [yes]? y
Create defect label [yes]? y

Use the read command to find the defect.

analyze> read
Ready to analyze (won't harm SunOS). This takes a long time,
but is interruptible with Control-C. Continue? y
        pass 0
   25/7/24
        pass 1
Block 12354  (18/4/18), Corrected media error (hard data ecc)
   25/7/24
^C
Total of 1 defective blocks repaired.