puffy# disklabel -h sd1
# /dev/rsd1c:
type: SCSI
disk: SCSI disk
label: HGST HUS726060AL
duid: d987db29ff2642aa
flags:
bytes/sector: 512
sectors/track: 255
tracks/cylinder: 511
sectors/cylinder: 130305
cylinders: 89950
total sectors: 11721045168 # total bytes: 5.5T
boundstart: 64
boundend: 4294961685
drivedata: 0

16 partitions:
#                size           offset  fstype [fsize bsize   cpg]
  a:             2.0T               64    RAID
  c:             5.5T                0  unused
puffy# disklabel -E sd1
Label editor (enter '?' for help at any prompt)
> a
No space left, you need to shrink a partition
>