Clone scsi disc solaris 8

I have a SunOS 5.8 Generic_108528-29 sun4u sparc SUNW,UltraAX-i2, i have 2 scsi disk, the first with the S.O. and the second free.

I read many in the forum about this: with single user, miniroot, dd, flarcreate, ufsdump and ufsrestore.

Which is the best metod?

If i clone the disk with any of this metods, then only mount the disk or i need anything more?

Tkns.

PS: I'm sorry for my english and my last post in spanish.

Assuming both disks are same size, replicate partition table using prtvtoc and fmthard

prtvtoc /dev/rdsk/cXdXd0s2  | fmthard -s - /dev/rdsk/cXtXd0s2

This will create same disk partition on second disk.
My choice would be to use ufsdump. If you plan to boot from second disk, install boot loader on second disk using installboot command.

installboot /usr/platform/`uname -i`/lib/fs/ufs/bootblk  /dev/rdsk/cXtXd0s0

The other option which can also used in this case is Solaris Live update

Now when i try to install a secondary scsi disk to clone (c1t1d0). I have the next problem, when do format i get the next:

# format
Searching for disks...Oct 20 22:50:31 beto scsi: WARNING: /pci@1f,0/pci@1/scsi@8/sd@1,0 (sd1):
Oct 20 22:50:31 beto    offline
done

AVAILABLE DISK SELECTIONS:
       0. c1t0d0 <SUN36G cyl 24620 alt 2 hd 27 sec 107>
          /pci@1f,0/pci@1/scsi@8/sd@0,0
       1. c1t1d0 <drive type unknown>
          /pci@1f,0/pci@1/scsi@8/sd@1,0
Specify disk (enter its number):1

AVAILABLE DRIVE TYPES:
        0. Auto configure
        1. Quantum ProDrive 80S
        2. Quantum ProDrive 105S
        3. CDC Wren IV 94171-344
        4. SUN0104
        5. SUN0207
        6. SUN0327
        7. SUN0340
        8. SUN0424
        9. SUN0535
        10. SUN0669
        11. SUN1.0G
        12. SUN1.05
        13. SUN1.3G
        14. SUN2.1G
        15. SUN2.9G
        16. Zip 100
        17. Zip 250
        18. SUN36G
        19. other
Specify disk type (enter its number): 18 <--- the disk: 36 gb
selecting c1t1d0
[disk unformatted]

When i try to make a format:

format> format
Ready to format.  Formatting cannot be interrupted.
Continue?
Beginning format. The current time is Tue Oct 20 23:03:21 2009

Reserve failed
failed

I don't know why i can't format the second disk. Somebody help me?

go to /dev/dsk and dev/rdsk,
rm c1t1d*
devfsadm -Cv -c disks
then do format, make sure you see the second disk online, then choose the disk, choose option 0-Autoconfigure

Thanks, but when i run:

# devfsadm -Cv -c disks

get the next message:

Oct 21 20:55:19 beto smt: smt0: nf FDDI driver is not active. Initialization of this driver cannot be completed.

And when i run format -> Autoconfigure get:

Specify disk type (enter its number): 0
Auto configure failed

What can i do?

please provide the output
echo|format
Your disk should spin up before you can do anything.