this is slightly off topic but im just wondering why spend thousands of dollars when u can just setup another server and backup everything to a raided hard drive array?<br><br>
<div><span class="gmail_quote">On 7/2/08, <b class="gmail_sendername">Steve Cousins</b> <<a href="mailto:cousins@umit.maine.edu">cousins@umit.maine.edu</a>> wrote:</span>
<blockquote class="gmail_quote" style="PADDING-LEFT: 1ex; MARGIN: 0px 0px 0px 0.8ex; BORDER-LEFT: #ccc 1px solid"><span class="q"><br><br>
<blockquote class="gmail_quote" style="PADDING-LEFT: 1ex; MARGIN: 0px 0px 0px 0.8ex; BORDER-LEFT: #ccc 1px solid">Just under 60MB/sec seems to be the maximum tape transport read/write<br>limit. Pretty reliably the first write from the beginning of tape was a<br>
bit slower than writes started further into the tape.<br></blockquote><br></span>I believe LTO-3 is rated at 80 MB/sec without compression. Testing it on our HP unit in an Overland library I get:<br><br>WRITE:<br><br>dd if=/dev/zero of=/dev/nst0 bs=512k count=10k<br>
10240+0 records in<br>10240+0 records out<br>5368709120 bytes (5.4 GB) copied, 71.8723 seconds, 74.7 MB/s<br><br>READ:<br><br>dd of=/dev/null if=/dev/nst0 bs=512k count=10k<br>10240+0 records in<br>10240+0 records out<br>
5368709120 bytes (5.4 GB) copied, 69.2487 seconds, 77.5 MB/s<br><br>I used a 512K block size because that is what I use with our backups and it has given optimal performance since the DLT-7000 days.<br><br>Good luck,<br><br>
Steve<br>______________________________________________________________________<br><span class="sg"> Steve Cousins, Ocean Modeling Group Email: <a onclick="return top.js.OpenExtLink(window,event,this)" href="mailto:cousins@umit.maine.edu" target="_blank">cousins@umit.maine.edu</a><br>
Marine Sciences, 452 Aubert Hall <a onclick="return top.js.OpenExtLink(window,event,this)" href="http://rocky.umeoce.maine.edu/" target="_blank">http://rocky.umeoce.maine.edu</a><br> Univ. of Maine, Orono, ME 04469 Phone: (207) 581-4302</span>
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</span></div></blockquote></div><br><br clear="all"><br>-- <br>Jonathan Aquilina