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<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>My suggestion:<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Call IBM support and tell them what you are seeing. Maybe there
is a setting that can be adjusted.<o:p></o:p></span></p>
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<p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span
style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'> CarlosOrtiz@bayviewfinancial.com
[mailto:CarlosOrtiz@bayviewfinancial.com] <br>
<b>Sent:</b> Friday, February 16, 2007 10:38 AM<br>
<b>To:</b> Simon, Bill<br>
<b>Cc:</b> cisco-voip@puck.nether.net; cisco-voip-bounces@puck.nether.net; Matt
Slaga (US)<br>
<b>Subject:</b> Re: [cisco-voip] Drive Mirroring<o:p></o:p></span></p>
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<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal style='margin-bottom:12.0pt'><br>
<span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>That is good to
know but might not help us much. We typically are doing this while the system
is still up to prepare for an upgrade or something.</span> <br>
<br>
<span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Carlos</span> <br>
<br>
<o:p></o:p></p>
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<p class=MsoNormal><b><span style='font-size:7.5pt;font-family:"Arial","sans-serif"'>"Simon,
Bill" <bills@tns.its.psu.edu></span></b><span style='font-size:
7.5pt;font-family:"Arial","sans-serif"'> </span><o:p></o:p></p>
<p><span style='font-size:7.5pt;font-family:"Arial","sans-serif"'>02/16/2007
10:22 AM</span> <o:p></o:p></p>
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<p class=MsoNormal align=right style='text-align:right'><span
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<p class=MsoNormal><span style='font-size:7.5pt;font-family:"Arial","sans-serif"'>CarlosOrtiz@bayviewfinancial.com</span>
<o:p></o:p></p>
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<p class=MsoNormal align=right style='text-align:right'><span
style='font-size:7.5pt;font-family:"Arial","sans-serif"'>cc</span><o:p></o:p></p>
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<p class=MsoNormal><span style='font-size:7.5pt;font-family:"Arial","sans-serif"'>"Matt
Slaga (US)" <Matt.Slaga@us.didata.com>, cisco-voip-bounces@puck.nether.net,
cisco-voip@puck.nether.net</span> <o:p></o:p></p>
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<p class=MsoNormal align=right style='text-align:right'><span
style='font-size:7.5pt;font-family:"Arial","sans-serif"'>Subject</span><o:p></o:p></p>
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<p class=MsoNormal><span style='font-size:7.5pt;font-family:"Arial","sans-serif"'>Re:
[cisco-voip] Drive Mirroring</span><o:p></o:p></p>
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<p class=MsoNormal style='margin-bottom:12.0pt'><br>
<br>
<br>
<tt><span style='font-size:10.0pt'>What we found on HP is if you mirror when
the OS is halted (e.g. go into </span></tt><span style='font-size:10.0pt;
font-family:"Courier New"'><br>
<tt>the RAID BIOS screen on startup) it cuts down the time by at least half.</tt><br>
<br>
<tt>The extra disk I/O involved with a running OS (and apps) slows it down </tt><br>
<tt>considerably. Same might be applicable to IBM.</tt><br>
<br>
<tt>CarlosOrtiz@bayviewfinancial.com wrote:</tt><br>
<tt>> </tt><br>
<tt>> Hard to believe in this day and age you would have such a performance </tt><br>
<tt>> gap on comparable servers. Maybe someone has found a way to cut
it </tt><br>
<tt>> down a bit.</tt><br>
<tt>> </tt><br>
<tt>> Carlos</tt><br>
<tt>> </tt><br>
<tt>> </tt><br>
<tt>> Most of this is due to processor time. HP has always been way
ahead of </tt><br>
<tt>> the curve compared to IBM with offloading most processor requirements </tt><br>
<tt>> onto the RAID card. Another reason I prefer compaq servers over
big blue.</tt><br>
<tt>> </tt><br>
<tt>> </tt><br>
<tt>> </tt><br>
<tt>> After working with the HP MCS servers and IBM MCS servers we have
found </tt><br>
<tt>> a HUGE difference in rebuild time for mirrored drives.
The HP's </tt><br>
<tt>> usually rebuild in about 20-30 mins. The IBM's take about 5 hrs.
Is </tt><br>
<tt>> there anything that can be done to speed up the IBM process? Are there
</tt><br>
<tt>> any known issues?</tt><br>
<br>
<br>
</span><o:p></o:p></p>
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