As I started experimenting with VMware Virtual SAN (VSAN) in my lab and am using consumer grade SSDs which are not on VSAN (beta) HCL I am worried about wear and tear of the memory cells who have limited write endurance.
I wondered if it is possible to access the SMART attributes of the disks and quick search showed that there is a KB article 2040405 written which still applies although not specific to vSphere 5.5.
From the ESXi console run esxcli storage core device list to get list of storage devices and then run esxcli storage core device smart get -d device to get the SMART data.
This is output of my Intel 520 drive.
Unfortunately another host with OCZ SSD does not display any data with an error:
Error getting Smart Parameters: CANNOT open device
Tom Fojta's Blog 
Hi Tom! Could you verify if this output, if available at all, is reliable? To me the “Media Wearout Indicator” does not seem to contain actual data, just like the “Power-on Hours” or “Write Sectors TOT Count” as well.