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echo: os2prog
to: Rob Hamerling
from: Dmitry M Golubovsky
date: 1997-03-11 09:59:00
subject: Identifying HPFS partitio

Hello Rob!

Sat Mar 08 1997 13:37, Rob Hamerling wrote to Jonathan de Boyne Pollard:

 RH> Another (maybe also not foolproof) check: read from the partition boot
 RH> sector the field "number of copies of the FAT" (unsigned byte at
 RH> offset 16). Not surprisingly this is zero on HPFS volumes.

A filesystem signature is placed at offset 0x36 (AFAIR) or near this in the
boot sector of a partition. It contains "FAT" for FAT and
"HPFS" for hpfs :)

But filesystem signature is not an universal way because for example linux
volume does not contain something like signature at the same place (tested
on floppies).

To ALL but maybe a little offtopic: what methods may be used to determine
filesystems one from another? Looking to the partition table seems to be
too trivial but not all medias have it.


                                     [TEAM OS/2 Member DG008]

Dmitry

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