Although I'm familiar with and use VMware daily, i'm only just getting started with my lab environment so please keep the technical beatings to a minimum 
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Here Goes:
I purchased a pretty elaborate "Lab" setup b/c I wanted to get serious about learning- here are the details
3X everything on this list
-Shuttle SH87R6
-I7-4770 3.4ghz Quad
-Crucial 240gb m500 SSD
-Mushkin 120gb mSATA SSD
-WD 1tb HDD
-32GB ram per system
-Adata DashDrive 8gb USB
-Lite-On DVD Burner
Heres the Story:
I installed ESXi 5.5, Got the BETA for VSAN and went to town. I had a 2.7TB VSAN up and running, I had about 9 VM's running for almost a month when suddenly I noticed that my Storage in VSAN was way down. I started poking around in vCenter and couldn't really identify much as its still pretty new to me. I was able to finally figure out how to identify which of my Hosts had lost storage. Thinking - its a lab environment- who cares really...I tried power cycling the entire environment and that's when things got messy. When I booted everything back up I was missing VM's and things were just pretty boogered up. All that said, the underlying issue was that I lost storage.
Now, I've "rebuilt" the environment (kicking myself...Cause that's always a fun task) and I'm back to square 1 with these disappearing disks. here's the problem in a nutshell- When performing any IO Intensive operations (simultaneous VMotions, VM creations, Patching on multiple systems) the 2 "SSD" disks randomly disappear. The Optical and HDD never disappear (might be worth noting that)
here's where it gets really funky...
I figure, let me storage VMotion the VM's over to one of the other hosts and then I can start working on identifying root cause for this Host. So yeah, I kick off a Vmotion and go to bed. I woke up the next morning and now I have 2 Hosts doing this. The original Host (which I half expected to find) and the host where the VMotions were headed which up until this point had exhibited ZERO issues. Again, its ONLY the 2 SSD's that disappear.
To get the disks to "re-appear" I have to power down the hosts and power them back up- a reboot doesn't work
What I've tried:
Switching the power adapters to the SSD's (thinking Power Supply issue)
Switching the Sata ports - Thinking SATA/MB issue
Removing 1 of the SSD- thinking possible problematic SSD
Removing the other SSD- Same thought
Same 2 disks disappearing... I'm already balding.. and this isn't helping...
Has anyone seen this or have any ideas on what I can do? Please be descriptive if you have something you'd like me to try..
thanks
Paul
