Date: 17 July 1991                    X3T9.2/91-102 Rev 1
         
        To:   John Lohmeyer
              Chairman, ANSI X3T9.2 (SCSI)
         
        From: Doug Hagerman
              Digital Equipment Corporation
              SHR 1-3/E29
              333 South Street
              Shrewsbury, MA  01545
              Phone: 508-841-2145  FAX: 508-841-2604
         
        Subject:  Request for Two Tape Media Identifiers


Digital would like to request the addition of the following
two media type identifiers to table 9-22:  Sequential-Access
Density Codes.

Code  Width             Density
Value mm (in)    Tracks bpmm    bpi  Code Type Reference   Note
----- ---------- ------ ------------ ---- ---- ----------- ----

xxh   12.7 (0.5) 48      394 (10000) MFM  C    X3.193-1990 1,4

yyh   12.7 (0.5) 48*    1673 (42500) MFM  C    X3B5/91-174 1,4


* We're not sure whether this is the right thing to put here.
The drives have two heads that write bit serial parallel
tracks in 24 serpentine passes for a total of 48 tracks.

Since neither of the References appear in Apendix D Table D-2
as they are for fairly recent documents, they should be added
also.