Veritas-bu

[Veritas-bu] Why don't tapes hold the same amount of data?

2006-03-01 02:56:51
Subject: [Veritas-bu] Why don't tapes hold the same amount of data?
From: simon.weaver AT astrium.eads DOT net (WEAVER, Simon)
Date: Wed, 1 Mar 2006 07:56:51 -0000
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All sorts of reasons Geoff, all down to the type of file size and data
stored on the tape, whether the data can or cannot be compressed, and if the
robot or tape drive can compress the data.
 
I think others have given opinions on this, but thats my opinion
 
 

Simon Weaver
Technical Support
Windows Domain Administrator 

EADS Astrium
Tel: 02392-708598 

Email: Simon.Weaver AT Astrium.eads DOT net 

-----Original Message-----
From: Geoff Hazel [mailto:geoff_hazel AT yahoo DOT com] 
Sent: 28 February 2006 17:36
To: veritas-bu AT mailman.eng.auburn DOT edu
Subject: [Veritas-bu] Why don't tapes hold the same amount of data?


We have all the same tapes in the robot library, but when I look at the
"full" tapes I see a wide difference in the amount of data they have:
 
A00085  HCART    TLD      0       16     -       3     151715893        
FULL
A00088  HCART    TLD      0       7      -       1     255478199        
FULL
A00089  HCART    TLD      0       10     -       1     343680501        
FULL
A00090  HCART    TLD      0       13     -       3     315433835        
FULL

Why do some tapes hold twice as much data as other tapes?



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<DIV><SPAN class=898595507-01032006><FONT face=Arial color=#0000ff size=2>All 
sorts of reasons Geoff, all down to the type of file size and data stored on 
the 
tape, whether the data can or cannot be compressed, and if the robot or tape 
drive can compress the data.</FONT></SPAN></DIV>
<DIV><SPAN class=898595507-01032006><FONT face=Arial color=#0000ff 
size=2></FONT></SPAN>&nbsp;</DIV>
<DIV><SPAN class=898595507-01032006><FONT face=Arial color=#0000ff size=2>I 
think others have given opinions on this, but thats my 
opinion</FONT></SPAN></DIV>
<DIV>&nbsp;</DIV>
<DIV>&nbsp;</DIV><!-- Converted from text/rtf format -->
<P><SPAN lang=en-gb><B><FONT face=Arial color=#0000ff size=2>Simon 
Weaver</FONT></B><FONT face=Arial><BR></FONT><B><FONT face=Arial color=#0000ff 
size=2>Technical Support</FONT></B><FONT face=Arial><BR></FONT><B><FONT 
face=Arial color=#0000ff size=2>Windows Domain Administrator</FONT></B><FONT 
face=Arial> </FONT></SPAN></P>
<P><SPAN lang=en-gb><B><I><FONT face=Arial size=2>EADS 
Astrium</FONT></I></B><I></I><FONT face=Arial><BR></FONT><B></B><B><I><FONT 
face=Arial size=2>Tel: 02392-70</FONT><FONT face=Arial 
size=2>8598</FONT></I></B><I></I><FONT face=Arial> </FONT></SPAN></P>
<P><SPAN lang=en-gb><B><FONT face=Arial color=#ff0000 size=2>Email: 
Simon.Weaver AT Astrium.eads DOT net</FONT></B><FONT face=Arial> 
</FONT></SPAN></P>
<BLOCKQUOTE style="MARGIN-RIGHT: 0px">
  <DIV></DIV>
  <DIV class=OutlookMessageHeader lang=en-us dir=ltr align=left><FONT 
  face=Tahoma size=2>-----Original Message-----<BR><B>From:</B> Geoff Hazel 
  [mailto:geoff_hazel AT yahoo DOT com] <BR><B>Sent:</B> 28 February 2006 
  17:36<BR><B>To:</B> veritas-bu AT mailman.eng.auburn DOT 
edu<BR><B>Subject:</B> 
  [Veritas-bu] Why don't tapes hold the same amount of 
data?<BR><BR></FONT></DIV>
  <DIV>We have all the same tapes in the robot library, but when I look at the 
  "full" tapes I see a wide difference in the amount of data they have:</DIV>
  <DIV>&nbsp;</DIV>
  <DIV>A00085&nbsp; HCART&nbsp;&nbsp;&nbsp; TLD&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 
  0&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 16&nbsp;&nbsp;&nbsp;&nbsp; 
  -&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 3&nbsp;&nbsp;&nbsp;&nbsp; 
  151715893&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <BR>FULL<BR>A00088&nbsp; 
  HCART&nbsp;&nbsp;&nbsp; TLD&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 
  0&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 7&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 
  -&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 1&nbsp;&nbsp;&nbsp;&nbsp; 
  255478199&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <BR>FULL<BR>A00089&nbsp; 
  HCART&nbsp;&nbsp;&nbsp; TLD&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 
  0&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 10&nbsp;&nbsp;&nbsp;&nbsp; 
  -&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 1&nbsp;&nbsp;&nbsp;&nbsp; 
  343680501&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <BR>FULL<BR>A00090&nbsp; 
  HCART&nbsp;&nbsp;&nbsp; TLD&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 
  0&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 13&nbsp;&nbsp;&nbsp;&nbsp; 
  -&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 3&nbsp;&nbsp;&nbsp;&nbsp; 
  315433835&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <BR>FULL<BR></DIV>
  <DIV>Why do some tapes hold twice as much data as other tapes?</DIV>
  <P>
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otherwise deal with it.<br>
Please notify the sender by return email.<br>
The views of the author may not necessarily constitute the views of EADS 
Astrium Limited.<br>
Nothing in this email shall bind EADS Astrium Limited in any contract or 
obligation.<br>
<br>
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Registered Office: Gunnels Wood Road, Stevenage, Hertfordshire, SG1 2AS, 
England<br>
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