Flether,<br><br>I never did it at 8.x, but I did do a a couple of times at 7.3.2.  It worked fine.  I just did one connection at the top of the stack at a time, but doing both should work.  <br><br>I&#39;ll assume the speed settings on the back of the shelves are are set correctly for whatever you have the hooked into.  You don&#39;t want to mix the shelf speeds.<br>
<br>Jeff<br><br><div class="gmail_quote">On Tue, May 21, 2013 at 5:34 PM, Fletcher Cocquyt <span dir="ltr">&lt;<a href="mailto:fcocquyt@stanford.edu" target="_blank">fcocquyt@stanford.edu</a>&gt;</span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div style="word-wrap:break-word">This is something I&#39;ve never had reason to attempt until now.<div><br></div><div>We have a 3270 cluster (8.1.2) </div><div>Head 2 aggr1 consists of these two multipathed DS14MK4 trays (IDs 1,2):</div>
<div><br></div><div><a href="http://i.imgur.com/821iN35.jpg" target="_blank">http://i.imgur.com/821iN35.jpg</a></div><div><br></div><div>We want to hot add another DS14MK4 trays racked right above (IDs 3,4):</div><div><br>
</div><div><a href="http://imgur.com/FlMxpyz" target="_blank">http://imgur.com/FlMxpyz</a></div><div><br></div><div>I&#39;ve read the 2011 DS14MK4 guide and verified the loop speeds are all set consistently and IDs are all unique.</div>
<div>(note: trays IDs are 1-4 from bottom to top)</div><div><br></div><div>Can I simply:</div><div><br></div><div>1 -  remove the top two pairs of fiber and transceivers (these go to head 1 (partner))</div><div>2 - daisy chain up from those vacated ports to new trays (3,4)</div>
<div>3 - plug the fiber and tranceivers back in on the top tray?</div><div><br></div><div>We would then grow (effectively double) this aggr1&#39;s capacity</div><div><br></div><div>What are the risks ? (2011 guide mentions panic&#39;s are possible with loop misconfig)</div>
<div><br></div><div>(we have 60 VMs running on head 2 on a separate loop and aggregate)</div><div><div><div><span style="border-collapse:separate;border-spacing:0px"><span style="text-indent:0px;letter-spacing:normal;font-variant:normal;text-align:-webkit-auto;font-style:normal;font-weight:normal;line-height:normal;border-collapse:separate;text-transform:none;font-size:medium;white-space:normal;font-family:Helvetica;word-spacing:0px"><span style="line-height:normal;text-indent:0px;border-collapse:separate;letter-spacing:normal;text-align:-webkit-auto;font-variant:normal;text-transform:none;font-style:normal;white-space:normal;font-weight:normal;word-spacing:0px"><div style="word-wrap:break-word">
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<font face="Verdana, Helvetica, Arial"><span style="text-indent:0px;letter-spacing:normal;font-variant:normal;text-align:-webkit-auto;font-style:normal;font-weight:normal;line-height:normal;border-collapse:separate;text-transform:none;font-size:medium;white-space:normal;font-family:Helvetica;word-spacing:0px"><span style="font-family:Verdana,Helvetica,Arial"><span style="text-indent:0px;letter-spacing:normal;font-variant:normal;text-align:-webkit-auto;font-style:normal;font-weight:normal;line-height:normal;border-collapse:separate;text-transform:none;font-size:medium;white-space:normal;font-family:Helvetica;word-spacing:0px"><span style="line-height:normal;text-indent:0px;border-collapse:separate;letter-spacing:normal;text-align:-webkit-auto;font-variant:normal;text-transform:none;font-style:normal;white-space:normal;font-weight:normal;word-spacing:0px"><div style="word-wrap:break-word">
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<br></div><div style="word-wrap:break-word">Any other tips appreciated</div></span><br></div><div style="word-wrap:break-word">thanks</div></span><br></span><br></span></span>
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<br></blockquote></div><br><br clear="all"><br>-- <br>Jeff Cleverley<br>Unix Systems Administrator<br>4380 Ziegler Road<br>Fort Collins, Colorado 80525<br>970-288-4611<br>