>>does anybody knows how the hard disk volume number is
>>calculated. These number is based on the day and the actual
>>time after formatting the (hard) disk. I believe the number is
>>coded in a fife byte array.
>>Where is these number placed on HD? It is just before the
>>disk label on a floppy.
In the boot sector together with a copy of the volume label.
DOS 4.xx and up.
Must We ?
Quote:>I have done a little (very little) research on this. I arrived
>at the conclusion that it is nothing more than a hash of the
>time of day. possibly to the hundredth of a second. It is not
>created for the purpose of determining the actual date and time,
Quote:>but serves only as a (IMO weak) security function. Of course,
Quote:>there also lies the possibility that there is an additional tag
>applied somewhere in Cyl-0 Side-1 Sector-1, to verify whether or
>not the serial number has been hacked. Below is a bit of info I
Isn't. It's almost entirely pointless.
Quote:>gathered. I believe this subject would be better clarified in
>the comp.sys.ibm.pc.hardware.storage newsgroup, so I have also
>directed this followup to that group.
>SN is located on Cyl-0 and easily changed with a hex
>editor that can gain direct access the HDD:
>This is an example of a harddisk which has a
>Serial Number of 0123:4567 (real cryptic, eh?) I edited this
>one myself using Norton Diskedit --
>MS-Dos 5 formatted
>Physical Sector: Cyl 0, Side 1, Sector 1
>000000: EB 3C 90 4D 53 44 4F 53 - 35 2E 30 00 02 04 01 00
>000010: 02 00 02 00 00 F8 F9 00 - 11 00 0F 00 11 00 00 00
>000020: 07 E4 03 00 80 00 29 67 - 45 23 01 4E 4F 20 4E 41
>000030: 4D 45 20 20 20 20 46 41 - 54 31 36 20 20 20 FA 33
See. Not such a big deal really.
.sig II Found and Restored ...