SCSI Expansion Rom

Steve Gaskill sgaskill at QNTM.COM
Wed Oct 9 09:39:30 PDT 1996

* From the SCSI Reflector (scsi at, posted by:
* sgaskill at (Steve Gaskill)
Windon asks:

     I read one book, it said that INT 13 function call (5h, 6h and 
     7h) Format comands should not be implemented for SCSI Expansion 
     Rom. If this is the case, how the DOS Format Command formating  
     the SCSI drive which attached to the SCSI contoller that has an  
     Expansion Rom?

I believe all versions of DOS (except Compaq DOS 3.31) use Read-Verify (INT 13h 
function 4) during the format.  Compaq DOS 3.31 actually writes to the drive, 
but all others simply verify the sectors.  No "formatting" is done.

Steve Gaskill
Quantum Corp.
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