Date: June 18, 1991                           X3T9.2/91-071 Rev 1


To: X3T9.2 Committee (SCSI)

From: George Penokie (IBM)

Subject: Direct Access Removable Media ASCQ's


Proposal:

We are requesting the addition of 3 ASCQs to the SCSI-3 standard.
These ASCQs would be added to the Incompatible Medium Installed (30h)
ASC.  The reason for these new codes is to notify the system that it
has attempted to write to medium or format a medium which is
incompatible with the device the medium has been inserted into.  This
can happen because the new higher capacity diskettes still look the
same as the current diskettes.  It is, also, very likely a high
capacity device will read the lower capacity diskettes without a
problem and would only fail if a write or format was attempted.




BYTE
12 13 DTLPWRSOMC DESCRIPTION
-- --            ------------------------------------------------
30 04 DT  W  O   CANNOT WRITE MEDIUM - UNKNOWN FORMAT
30 05 DT  W  O   CANNOT WRITE MEDIUM - INCOMPATIBLE FORMAT
30 06 DT  W  O   CANNOT FORMAT MEDIUM - INCOMPATIBLE MEDIUM