Question on QIC-150 tape usage

[Dan Watts]

In article <9009120004.aa24283 at SPARK.BRL.MIL> you write:
>There are QIC numbers that refer to many things, not just the recording
>format, but also the interfaces, read/write heads, ECC and Data Compression
>standards, etc.  Don't worry about QIC-02 for example, it is an interface
>standard.
>
>The major recording formats you will see now are:
>
>Recording Format     Cartridge Type    Capacity    Read Compatibility
>QIC-24                 DC600A            60MB
>QIC-120                DC6150           125MB        QIC-24
>QIC-150                DC6150           150MB        QIC-120/QIC-24
> (or a longer tape)    DC6250           250MB
> ... stuff deleted ...
>- Phil

Re: the DC6250 mentioned above.  Is there any truth to the warning that
comes printed on the 3M blurb sheet for that tape size?  It says that
use of extended length tapes may cause a change in the head wear
pattern that may reduce headlife, especially when using both standard
and extended tapes.  Will this really happen to my SGI tape drive??

Dan
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