How to checksum for a DVD under Panther?

Question

I'm helping a friend checking if a DVD was burned properly but he's saying that under Panther there's no Images menu in Disk Utility.

Answer 1

It looks like Panther's hdiutil supports checksumming, even if the Disk Utility GUI might not:

hdiutil checksum myimage.dmg -type MD5

(The supported types of checksums are listed in the man page. A common one seems to be UDIF-CRC32. If you use UDIF-CRC32 or UDIF-MD5 the checksums will be calculated separately per partition.)

Or you could always simply use the md5 command:

md5 myimage.dmg

Answer 2

Use hdiutil on the mounted drive:

hdiutil checksum /dev/disk1 -type UDIF-CRC32

The final calculated CRC appears at the bottom when the command completes running:

macbook:~ me$ hdiutil checksum /dev/disk1 -type UDIF-CRC32
Checksumming Driver Descriptor Map (DDM : 0)…
 Driver Descriptor Map (DDM : 0): calculated CRC32 $4F7D78B1
Checksumming Apple (Apple_partition_map : 1)
 Apple (Apple_partition_map : 1): calculated CRC32 $C4E22BED
Checksumming disk image (Apple_HFS : 2)
      disk image (Apple_HFS : 2): calculated CRC32 $04805620
Checksumming  (Apple_Free : 3)…
(Apple_Free : 3): calculated CRC32 $00000000
calculated CRC32 $52BB898F

This final calculated CRC ($52BB898F in the above example) is exactly the same as the one reported by Disk Utility:

You can use the diskutil list command for assistance in finding out the mounted drive's name.