Tag Archives: SVMotion

vSphere Upgrade: Rearranging LUNs for Better Performance: Updated

In my last post “IBM DS3400 Redundant Controllers and Bad Batteries, eNet Cable Fail” I realized that I badly configured my SAN from the start. So I bit the bullet and started a process to change the number of spindles per LUN to 11 of 12 disks, with the 12 disk being a hot spare. Performance on SAN LUN is directly proportional to the number of spindles in use by the RAID set and my old setup had 3 Disk LUNs instead of using virtual LUNs ontop of one larger physical LUN.

Now that I know how to configure this, I wanted to make use of the higher performance. To do this, I had to

  1. first offload all VMs from the SAN to some other storage by way of SVMotion
  2. backup any RDMs I have
  3. update the LUN layout of the IBM DS3400 to be 11 disks in a Raid 5 with virtual LUNs presented to ESX
  4. SVMotion the VMs to the new LUNs Continue reading vSphere Upgrade: Rearranging LUNs for Better Performance: Updated

SVMotion Saves the Day on SAN Move

The last major modification to my datacenter occured on friday. I physically relocated my SAN and its UPS. I have been reducing the size of my datacenter, as I documented in VMotion РRedundant Power Supplies Aid in Migration, and started to document in Upgrading My SAN.  I was waiting on this move until the new, much shorter, fibre cables arrived. Which they did earlier in the week.

Continue reading SVMotion Saves the Day on SAN Move