upgrade to freebsd 8 and missing ata device

[acydgod]

hi,
I had a second ATA drive mounted from /dev/ad2s1d as a ufs filesystem. I did a source upgrade from 7.2 to 8 (same instructions I've always done with buildworld, etc).

Now, after boot, I see no /dev/ad2s1d (only /dev/ad2) in the devices folder and cannot mount the drive.

When I run bsdlabel on it I get

$ bsdlabel /dev/ad2
# /dev/ad2:
8 partitions:
# size offset fstype [fsize bsize bps/cpg]
c: 156355584 0 unused 0 0 # "raw" part, don't edit


which I 'think' means the partition exists but the file system does not. Does anyone know how/if I might recover this drive?

There is just one partition for the whole disk.

Thanks