[Veritas-bu] Tape capacity

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How much data is in that 210G of blocks?  
 
If there's really not much data, the rest is probably all zeros.  Blocks
full of zeros would be highly compressible.
 
In general, long strings of repeated bytes are highly compressible.
 
-Mark

-----Original Message-----
From: Prabhala, Rama [mailto:RPrabhala AT forestpharm DOT com]
Sent: Friday, March 08, 2002 2:12 PM
To: veritas-bu AT mailman.eng.auburn DOT edu
Subject: [Veritas-bu] Tape capacity




Hi there Gurus, 

I am using a 40/80G DLT IV tape for backing up INformix database ( raw
volumes ) of size - 210G. The whole backup comes on a sngle tape. How is it
? Is it because of the Raw volumes ?

Regards, 

Rama 
493-7058 


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<DIV><SPAN class=898524721-08032002><FONT face=Arial color=#0000ff size=2>How 
much data is in that 210G of blocks?&nbsp; </FONT></SPAN></DIV>
<DIV><SPAN class=898524721-08032002><FONT face=Arial color=#0000ff 
size=2></FONT></SPAN>&nbsp;</DIV>
<DIV><SPAN class=898524721-08032002><FONT face=Arial color=#0000ff size=2>If 
there's really not much data, the rest is probably all zeros.&nbsp; Blocks full 
of zeros would be highly compressible.</FONT></SPAN></DIV>
<DIV><SPAN class=898524721-08032002><FONT face=Arial color=#0000ff 
size=2></FONT></SPAN>&nbsp;</DIV>
<DIV><SPAN class=898524721-08032002><FONT face=Arial color=#0000ff size=2>In 
general, long strings of repeated bytes are highly 
compressible.</FONT></SPAN></DIV>
<DIV><SPAN class=898524721-08032002><FONT face=Arial color=#0000ff 
size=2></FONT></SPAN>&nbsp;</DIV>
<DIV><SPAN class=898524721-08032002><FONT face=Arial color=#0000ff 
size=2>-Mark</FONT></SPAN></DIV>
<BLOCKQUOTE dir=ltr style="MARGIN-RIGHT: 0px">
  <DIV class=OutlookMessageHeader dir=ltr align=left><FONT face=Tahoma 
  size=2>-----Original Message-----<BR><B>From:</B> Prabhala, Rama 
  [mailto:RPrabhala AT forestpharm DOT com]<BR><B>Sent:</B> Friday, March 08, 
2002 2:12 
  PM<BR><B>To:</B> veritas-bu AT mailman.eng.auburn DOT edu<BR><B>Subject:</B> 
  [Veritas-bu] Tape capacity<BR><BR></FONT></DIV><BR>
  <P><FONT face=Arial size=2>Hi there Gurus,</FONT> </P>
  <P><FONT face=Arial size=2>I am using a 40/80G DLT IV tape for backing up 
  INformix database ( raw volumes ) of size - 210G. The whole backup comes on a 
  sngle tape. How is it ? Is it because of the Raw volumes ?</FONT></P>
  <P><FONT face=Arial size=2>Regards,</FONT> </P>
  <P><FONT face=Arial size=2>Rama</FONT> <BR><FONT face=Arial 
  size=2>493-7058</FONT> </P></BLOCKQUOTE></BODY></HTML>

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