If your slice 2 is empty and you got partitions 0-9 in your disk when checkign it in “format”, you have an EFI label.
If you want to change it to a SMI label, you need to use “format -e” and when prompted for the label type,
choose SMI
partition> label
[0] SMI Label
[1] EFI Label
Specify Label type[1]: 0
Warning: This disk has an EFI label. Changing to SMI label will erase all
current partitions.
Continue? y
Auto configuration via format.dat[no]?
Auto configuration via generic SCSI-2[no]?
partition>
68/433