Fujitsu SPARC Enterprise T5140 Product Notes page 79

Procedure for Recovering a Boot Drive's "drive type" (Continued)
CODE EXAMPLE A-1
milestone=none
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Use is subject to license terms.
Booting to milestone "none".
Requesting System Maintenance Mode
(See /lib/svc/share/README for more information.)
Console login service(s) cannot run
Root password for system maintenance (control-d to bypass): <====== login
single user mode
single-user privilege assigned to /dev/console.
Entering System Maintenance Mode
Oct 20 18:06:11 su: 'su root' succeeded for root on /dev/console
Sun Microsystems Inc.SunOS 5.10 Generic January 2005
Sourcing //.profile-EIS.....
3. Mount the tmpfs /tmp filesystem to provide a working area.
root@ # mount -F tmpfs /tmp
root@ # cd /tmp
4. Capture the boot drive's existing vtoc in a file stored in /tmp. Use the raw device of the boot device
the beginning -- i.e ., use /dev/rdsk/c?t?d?s? not /dev/dsk/c?t?d?s?
root@ # prtvtoc /dev/rdsk/c0t0d0s0 > /tmp/vtoc <======boot disk vtoc saved
in /tmp/vtoc
5. Make a copy of the fmthard utility for use in the /tmp work area.
root@ # cp /usr/sbin/fmthard /tmp
6. Set and export the NOINUSE_CHECK variable:
root@ # setenv NOINUSE_CHECK=1
root@ # export NOINUSE_CHECK
7. Run the format utility to restore the drive's "type".
root@ # format
Searching for disks...done
AVAILABLE DISK SELECTIONS:
0. c0t0d0 <drive type unknown> <========== drive type unknown is the issue
/pci@0/pci@0/pci@2/scsi@0/sd@0,0
Specify disk (enter its number): 0
determined at
Appendix A Fixed Issues 69