Storage landscape
As I've had hands on with pretty much every one of these vendors products i'd like to toss in a couple of thoughts.
1. Dell / EMC - The XtremIO is garbage... If you love watching your tier 1 array fail spectacularly... here you go. The only reason this has a market presence at all is the EMC brand. As well as their sales force was getting double commissions pushing it. So instead of refreshing VNXs or Vmax, guess what their sales force shoved down the throat of everyone of their existing customers?
2. HP - 3par 7450 and 8450 ... its a damn 3par with only flash drives and more memory... that is it. It couldn't possibly be a lazier entry into the AFA market than this. Dedupe and compression are clearly after thoughts, and from the interface you'll struggle to find out how well the array is actually performing in these metrics compared to other vendors.
3. IBM - TMS feels like its the last bit of hardware that IBM actually sells outside of Power. Big blue has stifled the once awesome prospect of TMS and it's RamSan. As far as being a market leader, it hardly qualifies. Like EMC this was an install base refresh ploy to show market share.
4. Pure - Frankly I love their //m series array. Its clean (only power and fiber coming off the back), installed in 30 minutes, and the interface is easy to use and didn't require a VM or extra 1U server to run (looking at you EMC and HP). Only issue I have is with array sprawl, once you hit the capacity or the iops limit of the array you need another one, with a separate management interface. So its harder from a capacity stand point to replace VMaxs or 10000/20000 3pars with it. Though they at least have a multi-array management tool.
5. Solid Fire - It was "ok". I think the biggest annoyance is they market it as a 100 node capable, but fail to mention that is only if you use iSCSI for your block based storage. If you use fiber you are limited to 20 nodes due to the fan-in bottleneck of the 2 fiber channel nodes. Oh and they don't sell or configure the dual 10 Gb switches required to form the cluster, so you need to do quite a bit of extra networking work to get this operational.
6. Kaminario - I like the scale up or scale out design, and the interface is clean. The install though was painful...5+ hours on the first and 3+ days for the 2nd due to a DOA component they had to triage. Marketing and name recognition is next to non-existent. I really was hoping NetApp was going to buy them instead of solid-fire.
7. Violin - Clearly losing a battle in the flash industry because of their focus on block storage in a very crowded market. They would excel if they instead focused on their NAS component through the WFA... uses the same hardware just a custom Windows 2012 Server storage edition on its management blades. SMB 3.0 has some very cool features that are being under-marketed (RDMA and Multi-channel). If they would OEM the hardware and provide linux drivers for the Vimms their array would fit nicely into a HPC cluster file system (gpfs / lustre).
8. Sandisk -The infiniflash has some awesome density, just poor connectivity... 512TB and only 6 Gb SAS?
9. HDS - HAHAHAHAHAHAHAHA... no. When is the last time anyone had a rep come by their office?
10. Tegile - They at least figured out DDR cache is still faster than sas based SSD, which the rest of the market seems to have forgotten. They fail on the fact that they are still hybrid centered, and their box is nothing more than software on a supermicro box.