Ref. disklabel(8) > The maximum disk and partition size is 64PB. Is that so? Let see...
OpenBSD 6.7 (GENERIC.MP) #2: Thu Jun 4 09:55:08 MDT 2020 $> doas dmesg | grep sd3 sd3 at scsibus2 targ 2 lun 0: <ATA, ST5000LM000-2AN1, 0001> naa.5000c500c3ad5c90 sd3: 4769307MB, 512 bytes/sector, 9767541168 sectors $> doas disklabel -p t sd3 # /dev/rsd3c: type: SCSI disk: SCSI disk label: ST5000LM000-2AN1 duid: [omitted] flags: bytes/sector: 512 sectors/track: 255 tracks/cylinder: 511 sectors/cylinder: 130305 cylinders: 74959 total sectors: 9767541168 # total bytes: 4.5T boundstart: 256 boundend: 4294852800 drivedata: 0 16 partitions: # size offset fstype [fsize bsize cpg] c: 4.5T 0 unused $> doas disklabel -E sd3 sd3> p t OpenBSD area: 256-4294852800; size: 2.0T; free: 2.0T ..............................^^^^^^^^^^^^^^^^^^^^^^ :( # size offset fstype [fsize bsize cpg] c: 4.5T 0 unused $> echo "/ 4T" >label $> doas disklabel -w -A -T label sd3 disklabel: autoalloc failed :( $> doas disklabel -E sd3 Label editor (enter '?' for help at any prompt) sd3> p t OpenBSD area: 256-4294852800; size: 2.0T; free: 2.0T # size offset fstype [fsize bsize cpg] c: 4.5T 0 unused sd3> a partition: [a] offset: [256] size: [4294852544] FS type: [4.2BSD] sd3*> p t OpenBSD area: 256-4294852800; size: 2.0T; free: 0.0T # size offset fstype [fsize bsize cpg] a: 2.0T 256 4.2BSD 8192 65536 1 c: 4.5T 0 unused sd3*> :(
