Author Archives: loopbackconnector

VNX trespassed luns command line

Posted on August 31, 2011 by loopbackconnector

EMC Command line find and remedy trespassed luns (this is being run on a EMC VNX 7500) To list all of the luns that are trespassed on your array run (example output below) NaviSECCli.exe -h emcvnx7500spa.example.com -user sysadmin -password sysadmin … Continue reading →

Posted in Clariion, EMC, Storage Arrays, VNX Block | 3 Comments

VNX and Brocade Loop Port

Posted on August 24, 2011 by loopbackconnector

I have been working with two new EMC VNX’s and ran into a odd problem and could not find anything about the issue, so I am going to post what I know and see if anyone has any more in-depth … Continue reading →

Posted in Brocade, EMC, FIber Switches, Storage Arrays | 8 Comments

VMWare ALUA path preference

Posted on August 8, 2011 by loopbackconnector

Updating some path types the other day in VMware for a ALUA compliant storage array, came across http://www.yellow-bricks.com/2011/03/21/changing-the-psp-from-fixed-to-rr/ Duncan wrote the post very well so as I was running some of the commands I noticed that one of them appeared to be EMC … Continue reading →

Posted in Storage Arrays, VMWare | Leave a comment

Identify storage performance issues with esxtop

Posted on August 1, 2011 by loopbackconnector

Taken from http://kb.vmware.com/kb/1008205 Start esxtop by typing ‘esxtop’ at the command line Press ‘d’ to switch to disk view (HBA mode. Press s, then 2 to alter the update time to every 2 seconds and press Enter. Now I have used … Continue reading →

Posted in Perfomance, VMWare | Leave a comment

Thoughts on Raid 6

Posted on July 29, 2011 by loopbackconnector

The other day I was building a new lun and had the option of raid 5 or raid 6… Hmm.. 6 must be better because it is newer? Not so much.. Is it better? Depends on your criteria of better? More … Continue reading →

Posted in RAID | Leave a comment

Max Lun Size

Posted on July 7, 2011 by loopbackconnector

So the other day I was given the task of presenting 32tb contiguous (or as much as possible). No problem I thought, I had a EMC Clariion and a few HP EVA’s at my disposal.  All had updated firmware so … Continue reading →

Posted in EMC, Hitachi, HP, Netapp, Storage Arrays | 2 Comments

Disk Alignment

Posted on July 5, 2011 by loopbackconnector

One step to remember when doing your P2V process, if able, be sure to run your favorite disk alignment software. While 2008 servers (and hopefully newer) do not suffer from the alignment issue of a blindly formatted disk 2003 does, and … Continue reading →

Posted in P2V, Utilities, Virtualization | Leave a comment