請問如何重新掛上 bsdlabel - BBS

之前有台外接磁碟，原本的主系統是BSD6.2
目前主系統重灌為BSD9.2，但原本的外接磁碟卻掛不上來
該外接磁碟的 fdisk 訊息如下

******* Working on device /dev/da0 *******
parameters extracted from in-core disklabel are:
cylinders=486305 heads=255 sectors/track=63 (16065 blks/cyl)

Figures below won't work with BIOS for partitions not in cyl 1
parameters to be used for BIOS calculations are:
cylinders=486305 heads=255 sectors/track=63 (16065 blks/cyl)

Media sector size is 512
Warning: BIOS sector numbering starts with sector 1
Information from DOS bootblock is:
The data for partition 1 is:
sysid 165 (0xa5),(FreeBSD/NetBSD/386BSD)
start 63, size 3812497542 (1861571 Meg), flag 80 (active)
beg: cyl 0/ head 1/ sector 1;
end: cyl 1023/ head 254/ sector 63
The data for partition 2 is:
sysid 165 (0xa5),(FreeBSD/NetBSD/386BSD)
start 3812497605, size 3999992220 (1953121 Meg), flag 80 (active)
beg: cyl 1023/ head 255/ sector 63;
end: cyl 1023/ head 165/ sector 59
The data for partition 3 is:
<UNUSED>
The data for partition 4 is:
<UNUSED>

但使用 bsdlabel 卻都錯誤訊息如下
bsdlabel: disks with more than 2^32-1 sectors are not supported

請問該如何讓我再把原本的兩個磁區掛上來呢?

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