I’ve seen and had many discussions around this topic when discussing VMware View desktop design, so I though I’d gather as much information as I could to help you decide.
VMware View Desktops: IDE or SCSI? BusLogic, LSI Logic or PVSCSI?
February 7, 2011 By Leave a Comment
Multipath: Active/Passive, Dual Active, and Active/Active
March 31, 2010 By 2 Comments
Although it’s rare in the PC world, multipath I/O is not new in enterprise IT. I’ve been juggling paths to storage and networks as long as I’ve been a systems administrator, and that’s a bit longer than I care to admit. But the proliferation of technologies has made it difficult to understand path management. What’s the difference between “dual active” and “active/active”? Is “active/passive” really that bad?
The Assymetric Logical Unit Access (ALUA) mode on CLARiiON
March 26, 2010 By Leave a Comment
I’ve noticed that I have been getting a lot of search engine hits relating to the various features, specifications and problems on the EMC CLARiiON array. One of the searches was related to a feature that has been around for a bit. It was actually introduced in 2001, but in order to give a full explanation I’m just going to start at the beginning.
VMware PVSCSI Adapter performance and low I/O Workloads
February 24, 2010 By 1 Comment
One of the major new components in Virtual Machine Hardware 7 is the new Para Virtualised SCSI (PVSCSI) adapter. When it first came out there were a number of posts regarding the much improved I/O Performance and latency reduction this new adapter delivered, such as Chad Sakac’s I/O vSphere performance test post.
Cloud Computing: Block-Based Storage
October 12, 2009 By Leave a Comment
A while back, I discussed speculation from EMC around Emulex’s proposed cloud-block storage appliance, E3s (Enterprise Elastic Storage). With my current focus on Cloud Storage, I thought it would be good to delve a bit deeper into some of the aspects of why block-based cloud computing could prove tricky and why without an appliance it may be impossible.
Storage Changes in VMware ESX 3.5 Update 4
March 31, 2009 By Leave a Comment