Drive inventory - test-drb@ccmp.vtda.org

14 Feb 2002

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 From: 	Doc

 On Wed, 13 Feb 2002, Sellam Ismail wrote:

  DDS-2 and DDS-3 use physically different media. 
I don't know how this
 figures if the standards are all supposed to be backward compatible.  
   Actually, DDS and DDS2 different media, but not as in
 different form factors.  IIRC, DDS1 is 90m, DDS2 is 120m, and DDS3 is
 also 120m.  They have and identifier embedded in the media that tells
 the drive which DDS the tape is.  I know for sure that a DDS1 drive will
 simply spit out a DDS2 or DDS3 tape, and I think that holds true up the
 line.
   A DDS2 drive will read DDS1 archives, and write a DDS1 tape in DDS1
 format.  I dunno about DDS3. Every shop I've worked with who used DDS3
 drives used DDS3 tapes exclusively.

 	Doc
  ---
	DDS3 is 125m. Have one right here :) DDS3 drives work fine with DDS2
tapes, under NT4 and VMS. That's the size combination we're using here at
work.

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---   Yale University Press
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