Yeah, I went to GA Public school, but I home schooled (actually the wife, AND I married up) the chillern and that's why #1 graduated SCL from GA Tech and #3 is graduating SCL from SCAD. But my problem wasn't so much the reading as the semantics. Got the words, but mistook the meaning. When you said a spare for each mirrored pair I took it to mean a spare for each half of the mirror (as in pair of striped drives), not spare for each complete mirror.<br>
<br>Now, if I have it right on what you were suggesting, I'm not sure I understand the diff between that and what GF suggested. You were talking about 6 drives total, with 3 sets of 2 striped drives, one striped pair is mirrored to another striped pair and then the 3rd striped pair is the hot spare, correct? So how is his config different?<br>
<br><div class="gmail_quote">On Thu, Apr 22, 2010 at 3:17 PM, Jim Kinney <span dir="ltr"><<a href="mailto:jim.kinney@gmail.com">jim.kinney@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;">
reading -1 . math -1 . must have gone to public school in Georgia...<br><br>:-)<div><div></div><div class="h5"><br><br><div class="gmail_quote">On Thu, Apr 22, 2010 at 3:10 PM, Lightner, Jeff <span dir="ltr"><<a href="mailto:jlightner@water.com" target="_blank">jlightner@water.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
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<p class="MsoNormal"><font size="2" color="navy" face="Arial"><span style="font-size: 10pt; font-family: Arial; color: navy;">Maybe not great with reading either –
he said per active PAIR not SPARE. :p</span></font></p>
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<p class="MsoNormal"><b><font size="2" face="Tahoma"><span style="font-size: 10pt; font-family: Tahoma; font-weight: bold;">From:</span></font></b><font size="2" face="Tahoma"><span style="font-size: 10pt; font-family: Tahoma;">
<a href="mailto:ale-bounces@ale.org" target="_blank">ale-bounces@ale.org</a> [mailto:<a href="mailto:ale-bounces@ale.org" target="_blank">ale-bounces@ale.org</a>] <b><span style="font-weight: bold;">On Behalf Of </span></b>Greg Clifton<br>
<b><span style="font-weight: bold;">Sent:</span></b> Thursday, April 22, 2010
2:43 PM<div><br>
<b><span style="font-weight: bold;">To:</span></b> Atlanta
Linux Enthusiasts - Yes! We run Linux!<br>
<b><span style="font-weight: bold;">Subject:</span></b> Re: [ale] XFS on Linux -
Is it ready for prime time?</div></span></font></p>
</div>
<p class="MsoNormal"><font size="3" face="Times New Roman"><span style="font-size: 12pt;"> </span></font></p>
<p class="MsoNormal" style="margin-bottom: 12pt;"><font size="3" face="Times New Roman"><span style="font-size: 12pt;">Hey, I'm not great with
math, but if you have one hot spare for each active spare, wouldn't you need
mirrored quadruplets?</span></font></p><div><div></div><div>
<div>
<p class="MsoNormal"><font size="3" face="Times New Roman"><span style="font-size: 12pt;">On Thu, Apr 22, 2010 at 2:26 PM, Jim Kinney <<a href="mailto:jim.kinney@gmail.com" target="_blank">jim.kinney@gmail.com</a>> wrote:</span></font></p>
<p class="MsoNormal"><font size="3" face="Times New Roman"><span style="font-size: 12pt;">RAID 5 was an invention for a time when hard drives were total crap
tons of money. The pain of losing a drive in a RAID 5 array is just no longer
balanced by the cost of the drives. If a 1TB drive is only $100, it's bluntly
dirt cheap now to have a hot spare in a 4 active drive RAID 10 system. The
recovery is much easier and faster when checksums don't have to be calculated
for every stinking block on the drive(s). <br>
<br>
My ideal rig: Striped array for speed composed of mirrored triplets - 2 active,
one hot spare per active pair.</span></font></p>
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<p class="MsoNormal" style="margin-bottom: 12pt;"><font size="3" face="Times New Roman"><span style="font-size: 12pt;"> </span></font></p>
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<p class="MsoNormal"><font size="3" face="Times New Roman"><span style="font-size: 12pt;">On Thu, Apr 22, 2010 at 1:05 PM, Greg Clifton <<a href="mailto:gccfof5@gmail.com" target="_blank">gccfof5@gmail.com</a>>
wrote:</span></font></p>
<p class="MsoNormal"><font size="3" face="Times New Roman"><span style="font-size: 12pt;">Shift in focus to the hardware side of the equation. This thread
concentrates on software generated corruption issues, but I have some hardware
related questions. First, with RAIDed hard drives, are any file systems more or
less likely to cause (or minimize) the likelihood of corruption of the array
and if so, why? Second Greg F (and others) have commented on NOT using RAID 5
(and RAID 6) esp. with large hard drives. Looks like 1 or 2 TB hard drives will
soon be "standard issue" for everything but notebook computers. So
does that mean that RAID should be considered 'dead,' except for 0, 1, 10?
Third, would SSDs solve the failure from bad sector issues with HDDs and thus
be safe for RAID 5/6 implementations?</span></font></p>
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<p class="MsoNormal"><font size="3" face="Times New Roman"><span style="font-size: 12pt;">On Thu, Apr 22, 2010 at 9:41 AM, Ed Cashin <<a href="mailto:ecashin@noserose.net" target="_blank">ecashin@noserose.net</a>>
wrote:</span></font></p>
<p class="MsoNormal"><font size="3" face="Times New Roman"><span style="font-size: 12pt;">On Wed, Apr 21, 2010 at 9:34 PM, Doug McNash <<a href="mailto:dmcnash@charter.net" target="_blank">dmcnash@charter.net</a>>
wrote:<br>
...</span></font></p>
<div>
<p class="MsoNormal" style="margin-bottom: 12pt;"><font size="3" face="Times New Roman"><span style="font-size: 12pt;">> Does anyone out
there use xfs? How about a suggestion for a stable replacement.</span></font></p>
</div>
<p class="MsoNormal"><font size="3" face="Times New Roman"><span style="font-size: 12pt;">If you use the xfs in the mainline kernel, it's a crap shoot because<br>
of the amount of churn in the code, but<br>
if you use a long-term kernel like 2.6.16.y, 2.6.27.y, or the kernels<br>
maintained by distros, then it ought to be stable (as long as the<br>
distro has enough of a user base for other people to find the xfs<br>
bugs first).<br>
<font color="#888888"><span style="color: rgb(136, 136, 136);"><br>
--<br>
Ed Cashin <<a href="mailto:ecashin@noserose.net" target="_blank">ecashin@noserose.net</a>><br>
<a href="http://noserose.net/e/" target="_blank">http://noserose.net/e/</a><br>
<a href="http://www.coraid.com/" target="_blank">http://www.coraid.com/</a></span></font></span></font></p>
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