<html>
<head>
<meta content="text/html; charset=UTF-8" http-equiv="Content-Type">
</head>
<body bgcolor="#FFFFFF" text="#000000">
<div class="moz-cite-prefix">This ground has been trodden over here
before but it bears repeating. With drive sizes at 1TB and larger,
the probability of having an unrecoverable read error on RAID5
rebuild becomes significant enough to worry about. RAID6 isn't
significantly better. Sure, you may get away with it a few times,
in much the same way you might get away with having evil clown
rampage through your data center swinging sledgehammers around a
few times. So if you're going forward with RAID5 or 6 on an array
like this for cost-effectiveness' sake, you'd better be prepared
to restore from tape. <br>
<br>
On 12/23/14 5:37 PM, Dow Hurst wrote:<br>
</div>
<blockquote
cite="mid:CAF3ati-OJLrBbpGYnoSXS4mBr399znbHSiLTSSO9VShnWdeDiA@mail.gmail.com"
type="cite">
<div dir="ltr">
<div class="gmail_default" style="font-size:small">We have
already lost two drives close in time in the past and the
array has rebuilt the logical drive out of the spares without
a problem. I mistyped RAID5 for the eight 2TB drive logical
drive. I should have typed RAID6. How come I have a worse
problem than firmware? Thanks for your time!</div>
<div class="gmail_extra"><br clear="all">
<div>
<div class="gmail_signature">
<div dir="ltr"><font>Sincerely,<br>
Dow<br>
</font><font size="6"><span
style="color:rgb(0,0,0);font-family:sans-serif;line-height:44.79999923706055px;background-color:rgb(249,249,249)">⚛</span></font><font>Dow
Hurst, Research Scientist<br>
340 Sullivan Science Bldg.</font>
<div><font> Dept. of Chem. and Biochem.<br>
University of North Carolina at Greensboro<br>
PO Box 26170 Greensboro, NC 27402-6170<br>
</font><br>
</div>
</div>
</div>
</div>
<br>
<div class="gmail_quote">On Tue, Dec 23, 2014 at 5:10 PM, Jeff
Hubbs <span dir="ltr"><<a moz-do-not-send="true"
href="mailto:jhubbslist@att.net" target="_blank"
onclick="window.open('https://mail.google.com/mail/?view=cm&tf=1&to=jhubbslist@att.net&cc=&bcc=&su=&body=','_blank');return
false;">jhubbslist@att.net</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0
.8ex;border-left:1px #ccc solid;padding-left:1ex">
<div bgcolor="#FFFFFF" text="#000000">
<div>On 12/23/14 4:40 PM, Dow Hurst wrote:<br>
</div>
<blockquote type="cite">
<div dir="ltr">
<div style="font-size:small">I have a Promise VTrak
M610i 16 drive array. It has eight 2TB drives
used in RAID5. </div>
</div>
</blockquote>
Ooh, you have a worse problem than firmware if you
actually plan to rebuild that array someday...<br>
<br>
<blockquote type="cite">
<div dir="ltr">
<div style="font-size:small">I've added eight 3TB WD
Red NAS drives but the array doesn't think they
are larger than 2TB. I haven't found the max
drive size this array supports after looking
around. Does anyone know?</div>
<div style="font-size:small"><br>
</div>
<div style="font-size:small">The array firmware is
old: version 2.31.0000.00</div>
<div style="font-size:small"><br>
</div>
<div style="font-size:small">I've asked Promise
support if the latest firmware will help, but
haven't gotten a response yet. I appreciate any
answers y'all may have. If anyone has dealt with
an array of this type and upgraded the firmware,
does this preserve currently configured logical
drives?</div>
<div style="font-size:small"><br>
</div>
<div>
<div>
<div dir="ltr"><font>Sincerely,<br>
Dow<br>
</font><font size="6"><span
style="color:rgb(0,0,0);font-family:sans-serif;line-height:44.7999992370606px;background-color:rgb(249,249,249)">⚛</span></font><font>Dow
Hurst, Research Scientist<br>
340 Sullivan Science Bldg.</font>
<div><font> Dept. of Chem. and Biochem.<br>
University of North Carolina at
Greensboro<br>
PO Box 26170 Greensboro, NC
27402-6170<br>
</font><br>
</div>
</div>
</div>
</div>
</div>
<br>
<fieldset></fieldset>
<br>
<pre>_______________________________________________
Ale mailing list
<a moz-do-not-send="true" href="mailto:Ale@ale.org" target="_blank" onclick="window.open('https://mail.google.com/mail/?view=cm&tf=1&to=Ale@ale.org&cc=&bcc=&su=&body=','_blank');return false;">Ale@ale.org</a>
<a moz-do-not-send="true" href="http://mail.ale.org/mailman/listinfo/ale" target="_blank">http://mail.ale.org/mailman/listinfo/ale</a>
See JOBS, ANNOUNCE and SCHOOLS lists at
<a moz-do-not-send="true" href="http://mail.ale.org/mailman/listinfo" target="_blank">http://mail.ale.org/mailman/listinfo</a>
</pre>
</blockquote>
<br>
</div>
<br>
_______________________________________________<br>
Ale mailing list<br>
<a moz-do-not-send="true" href="mailto:Ale@ale.org"
onclick="window.open('https://mail.google.com/mail/?view=cm&tf=1&to=Ale@ale.org&cc=&bcc=&su=&body=','_blank');return
false;">Ale@ale.org</a><br>
<a moz-do-not-send="true"
href="http://mail.ale.org/mailman/listinfo/ale"
target="_blank">http://mail.ale.org/mailman/listinfo/ale</a><br>
See JOBS, ANNOUNCE and SCHOOLS lists at<br>
<a moz-do-not-send="true"
href="http://mail.ale.org/mailman/listinfo"
target="_blank">http://mail.ale.org/mailman/listinfo</a><br>
<br>
</blockquote>
</div>
<br>
</div>
</div>
<br>
<fieldset class="mimeAttachmentHeader"></fieldset>
<br>
<pre wrap="">_______________________________________________
Ale mailing list
<a class="moz-txt-link-abbreviated" href="mailto:Ale@ale.org">Ale@ale.org</a>
<a class="moz-txt-link-freetext" href="http://mail.ale.org/mailman/listinfo/ale">http://mail.ale.org/mailman/listinfo/ale</a>
See JOBS, ANNOUNCE and SCHOOLS lists at
<a class="moz-txt-link-freetext" href="http://mail.ale.org/mailman/listinfo">http://mail.ale.org/mailman/listinfo</a>
</pre>
</blockquote>
<br>
</body>
</html>