<html><body bgcolor="#FFFFFF"><div>You want more disks if you're going to be using the machines as ESXi hypervisors. Still RAID 10, but if you could get 6 or 8 disks, you'll get much better performance for your specific application as VM images tend to be large sequential reads.</div><div><br></div><div>-Scott<br><br>On Sep 23, 2011, at 5:12 PM, Greg Clifton <<a href="mailto:gccfof5@gmail.com">gccfof5@gmail.com</a>> wrote:<br><br></div><div></div><blockquote type="cite"><div>Sorry, poorly phrased question on my part. Obviously faster RPM slings more data under the heads faster and yes you can get 10k SATA drives and 15k SAS drives and of course the prices go up as the spindle speed goes up. I failed to state it but was assuming equivalent capacity & same RPM for both interfaces. The main question was, whether there is an advantage of SAS vs SATA with similar/same spec drives. <div>
<br></div><div>Customer wants 2TB of storage and to run ESXi 5 with Windows Multipoint w/ 10 clients + Win SBS 2008 + SQL Server + Sharepoint in VMs. So, not a home theater environment, more of a production environment. With this being the case, I suppose the 15k SAS drives would be the better choice if we can fit them into the budget.</div>
<div><br></div><div><br></div><div><br><div class="gmail_quote">On Fri, Sep 23, 2011 at 4:12 PM, Tavarvess Ware <span dir="ltr"><<a href="mailto:tavarvessware@gmail.com"><a href="mailto:tavarvessware@gmail.com">tavarvessware@gmail.com</a></a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;"><div><div><div style="font-family:Calibri,sans-serif;font-size:11pt">Has anyone tried the hybrid drives?<br><br>Sent from my Windows Phone<br>
</div></div><hr><span style="font-family:Tahoma,sans-serif;font-size:10pt;font-weight:bold">From: </span><span style="font-family:Tahoma,sans-serif;font-size:10pt">Dennis Ruzeski</span><br><span style="font-family:Tahoma,sans-serif;font-size:10pt;font-weight:bold">Sent: </span><span style="font-family:Tahoma,sans-serif;font-size:10pt">9/23/2011 3:14 PM</span><div>
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<span style="font-family:Tahoma,sans-serif;font-size:10pt;font-weight:bold">To: </span><span style="font-family:Tahoma,sans-serif;font-size:10pt">Atlanta Linux Enthusiasts</span><br><span style="font-family:Tahoma,sans-serif;font-size:10pt;font-weight:bold">Subject: </span><span style="font-family:Tahoma,sans-serif;font-size:10pt">Re: [ale] RAID 10 Question</span><br>
<br></div></div></div><div><div></div><div class="h5">Careful with the word faster in this context-- Higher RPM == Faster random seek times.<br><br>SAS drives can be had up to 15k (with a significant price increase).<br>
<br>--Dennis<br><br><br><br><div class="gmail_quote">
On Fri, Sep 23, 2011 at 3:07 PM, Lightner, Jeff <span dir="ltr"><<a href="mailto:JLightner@water.com" target="_blank"><a href="mailto:JLightner@water.com">JLightner@water.com</a></a>></span> wrote:<br>
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<p class="MsoNormal"><font size="2" color="navy" face="Arial"><span style="font-size:10.0pt;font-family:Arial;color:navy">rpm = revolutions per minute rather than RedHat Package Manager in this context.<u></u><u></u></span></font></p>
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<p class="MsoNormal"><font size="2" color="navy" face="Arial"><span style="font-size:10.0pt;font-family:Arial;color:navy">In our largest disk array we have SSD, SAS and SATA. The SAS are 10,000 RPM but the SATA are only 7200 RPM so the former are faster.<u></u><u></u></span></font></p>
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<p class="MsoNormal"><b><font size="2" face="Tahoma"><span style="font-size:10.0pt;font-family:Tahoma;font-weight:bold">From:</span></font></b><font size="2" face="Tahoma"><span style="font-size:10.0pt;font-family:Tahoma"> <a href="mailto:ale-bounces@ale.org" target="_blank"><a href="mailto:ale-bounces@ale.org">ale-bounces@ale.org</a></a> [mailto:<a href="mailto:ale-bounces@ale.org" target="_blank"><a href="mailto:ale-bounces@ale.org">ale-bounces@ale.org</a></a>]
<b><span style="font-weight:bold">On Behalf Of </span></b>Jim Kinney<br>
<b><span style="font-weight:bold">Sent:</span></b> Friday, September 23, 2011 2:57 PM<br>
<b><span style="font-weight:bold">To:</span></b> Atlanta Linux Enthusiasts<br>
<b><span style="font-weight:bold">Subject:</span></b> Re: [ale] RAID 10 Question</span></font><u></u><u></u></p>
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<p><font size="3" face="Times New Roman"><span style="font-size:12.0pt">$(x4 1 TB sata) < $(x1 1TB sas)<br>
Both are 3Gbps but sas has faster rpm and higher heat tolerance.<br>
But sata is easier to replace before failure due to cost. Replace every 4 years with a 5 year warranty drive and send it to a desktop.<u></u><u></u></span></font></p>
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<p class="MsoNormal"><font size="3" face="Times New Roman"><span style="font-size:12.0pt">On Sep 23, 2011 2:50 PM, "Greg Clifton" <<a href="mailto:gccfof5@gmail.com" target="_blank"><a href="mailto:gccfof5@gmail.com">gccfof5@gmail.com</a></a>> wrote:<br type="attribution">
> For a relatively small (2TB capacity) RAID 10 array comprised of 4x1TB hard<br>
> drives, is there any performance/reliability advantage in using SAS drives<br>
> vs SATA drives?<br>
> <br>
> Thanks,<br>
> GC<u></u><u></u></span></font></p>
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