26 lines
799 B
Plaintext
26 lines
799 B
Plaintext
|
Mediacheck documentation
|
||
|
|
October, 2008
|
||
|
|
|
||
|
|
|
||
|
|
Mediacheck is a tool we use to test the integrity of ISO images. The
|
||
|
|
ISO9660 specification allows for a 512 byte region which is for
|
||
|
|
application use. We use it to store a checksum of the ISO image. Of
|
||
|
|
couse putting the checksum into this region will change the checksum
|
||
|
|
of the final ISO image, so when we verify the checksum later we have
|
||
|
|
to fill in this 512 region with the original contents before the
|
||
|
|
implantation. It is set to all ASCII 32 decimal spaces.
|
||
|
|
|
||
|
|
If you have a set of ISO images you can implant the checksum data with
|
||
|
|
this command:
|
||
|
|
|
||
|
|
implantmd5iso <isoname>
|
||
|
|
|
||
|
|
NOTE: You cannot re-implant an ISO once its been implanted.
|
||
|
|
|
||
|
|
To check a ISO image you can use this command line:
|
||
|
|
|
||
|
|
checkisomd5 <isoname>
|
||
|
|
|
||
|
|
The tools are in the isomd5sum package.
|
||
|
|
|