updates to the mt manual page
	
There are 2 things in this pr.  First, is that in the existing mt man
page in the list of density codes, note #3 at the bottom that refers
to " 3. Old format known as QIC-11."  is not mentioned above.  It needs
to be on this line:

0x05    6.3  (0.25)  4/9       315   (8,000)  GCR   C   X3.136-1986  1

  in the notes column.


The second thing is I made up this tape cartridges table that I would
like to see added to the "mt page"  it is here:

 
NOTE ON QIC STREAMERS

The following is a table of Data Cartridge types as used in the 1/4 inch tape
drives such as the Archive Viper 150, Wangtek 5525ES, and Tandberg TDC4220
tape drives:

Density Code   Reference     Format    Cartridge Type  Capacity   Tracks  Length 
------------   ---------     ------    --------------  --------   ------  --------- 

0x05                         QIC-11    DC300           15MB       4       300ft
0x05                         QIC-11    DC300XL/P       20MB       4       450ft
0x05                         QIC-11    DC600           27MB       4       600ft
0x05           X3.136-1986   QIC-24    DC615A          15MB       9       150ft
0x05           X3.136-1986   QIC-24    DC300XL/P       45MB       9       450ft
0x05           X3.136-1986   QIC-24    DC600A          60MB       9       600ft
0x0F           QIC-120       QIC-120   DC600A/DC6150   120MB      15      620ft      
0x10           QIC-150       QIC-150   DC600XTD/DC6150 150MB      18      620ft
0x10           QIC-150       QIC-150   DC6250          250MB      18      1,020ft
0x11           QIC-320       QIC-525   DC6320          320MB      26      620ft
0x11           QIC-320       QIC-525   DC6525          525MB      26      1,020ft
0x1E           QIC-1000C     QIC-1000  DC9100/DL9135   1.0GB      30      760ft
0x1E           QIC-1000C     QIC-1000  DC9150          1.2GB      30      950ft
0x22           QIC-2GB(C)    QIC-2GB   DC9200          2.0GB      42      950ft
0x22           QIC-2GB(C)    QIC-2GB   DC9250          2.5GB      42      1,200ft

Notes:

  QIC-24, QIC-120, QIC-150 use fixed blocksize of 512 bytes, QIC-525, QIC-1000
and QIC-2GB can use blocksize of 1,024 bytes.  DDS (DAT) drives generally use
variable blocks.

  QIC-02 and QIC-36 are interface standards for tape drives.  The QIC-02 and
QIC-36 streamers such as the Wangtek 5250EQ are otherwise identical to their SCSI
versions (ie: Wangtek 5250ES).

  It seems that the 150MB and larger streamers cannot write QIC-24 9 track formats,
only read them.

  DC600A cartridges marked "10,000ftpi" can only be used as QIC-11, QIC-24, and
QIC-120 format.  DC600A cartridges marked 12,500ftpi can be used as both QIC-120
and QIC-150 format

  Some manufacturers don't use "DC" on their cartridges.  Verbatim uses DL,
Maxell uses MC, Sony uses QD, Quill uses DQ.  3M/Imation & Fuji use DC.  Thus
a DL6250, MC-6250, QD6250, DQ6250 are all identical media to a DC6250.

  QIC tape media is not "connected" to the take up reels and will de-spool
if the tape drive has dust covering the light sensor that looks for the end
of tape holes in the media.