Nerdy Drunk

If you are using vSAN on ESXi 5.5 you will need to manually flag your SSD's via esxcli. If you are using vSAN on ESXi 6.0 or above you can do this via the vSphere web client. This ability alone might be a good reason to upgrade to ESXi 6.0 or later, pending your hardware is on the VMware HCL for ESXi 6.0 and above.

~ # esxcli storage nmp device list
naa.6003048015830c001c1c45d4240e9567
   Device Display Name: Local SMC Disk (naa.6003048015830c001c1c45d4240e9567)
   Storage Array Type: VMW_SATP_LOCAL
   Storage Array Type Device Config: SATP VMW_SATP_LOCAL does not support device configuration.
   Path Selection Policy: VMW_PSP_FIXED
   Path Selection Policy Device Config: {preferred=vmhba2:C2:T1:L0;current=vmhba2:C2:T1:L0}
   Path Selection Policy Device Custom Config:
   Working Paths: vmhba2:C2:T1:L0
   Is Local SAS Device: false
   Is USB: false
   Is Boot USB Device: false

naa.6003048015830c001c1c451d1924ca51
   Device Display Name: Local SMC Disk (naa.6003048015830c001c1c451d1924ca51)
   Storage Array Type: VMW_SATP_LOCAL
   Storage Array Type Device Config: SATP VMW_SATP_LOCAL does not support device configuration.
   Path Selection Policy: VMW_PSP_FIXED
   Path Selection Policy Device Config: {preferred=vmhba2:C2:T0:L0;current=vmhba2:C2:T0:L0}
   Path Selection Policy Device Custom Config:
   Working Paths: vmhba2:C2:T0:L0
   Is Local SAS Device: false
   Is USB: false
   Is Boot USB Device: false

~ # esxcli storage nmp satp rule add -s VMW_SATP_LOCAL -d naa.6003048015830c001c1c451d1924ca51 -o enable_ssd
~ # esxcli storage core claiming reclaim -d naa.6003048015830c001c1c451d1924ca51

~ # esxcli storage nmp device list
naa.6003048015830c001c1c45d4240e9567
   Device Display Name: Local SMC Disk (naa.6003048015830c001c1c45d4240e9567)
   Storage Array Type: VMW_SATP_LOCAL
   Storage Array Type Device Config: SATP VMW_SATP_LOCAL does not support device configuration.
   Path Selection Policy: VMW_PSP_FIXED
   Path Selection Policy Device Config: {preferred=vmhba2:C2:T1:L0;current=vmhba2:C2:T1:L0}
   Path Selection Policy Device Custom Config:
   Working Paths: vmhba2:C2:T1:L0
   Is Local SAS Device: false
   Is USB: false
   Is Boot USB Device: false

naa.6003048015830c001c1c451d1924ca51
   Device Display Name: Local SMC Disk (naa.6003048015830c001c1c451d1924ca51)
   Storage Array Type: VMW_SATP_LOCAL
   Storage Array Type Device Config: SATP VMW_SATP_LOCAL does not support device configuration.
   Path Selection Policy: VMW_PSP_FIXED
   Path Selection Policy Device Config: {preferred=vmhba2:C2:T0:L0;current=vmhba2:C2:T0:L0}
   Path Selection Policy Device Custom Config:
   Working Paths: vmhba2:C2:T0:L0
   Is Local SAS Device: false
   Is USB: false
   Is Boot USB Device: false
~ #