Datastore mount operation fails with the error "This host does not support ATS, or ATS initialization"

Products

• VMware vSphere ESXi

Issue/Introduction

<sub>Datastore mount operation fails with error "This host does not support ATS, or ATS initialization"

This issue may be seen after a power outage in the environment.</sub>

_{vmkernel logs report messages as the traces below:}

• _{Denying reservation access on an ATS-only vol 'TEST DS'.}
• _{ATS-Only VMFS volume 'TEST DS' is not mounted. This host does not support ATS, or ATS initialization failed.}
• _{Failed to initialize VMFS distributed locking on volume 6798da19-########-05c1-#########: Not supported.}

_{vaai status output reports vaai primitives as unsupported.}

[root@#######:/var/log] esxcli storage core device vaai status get -d naa.600##################802
naa.600##################802
   VAAI Plugin Name:
   ATS Status: unsupported
   Clone Status: unsupported
   Zero Status: unsupported
   Delete Status: unsupported
   Ex Clone Status: unsupported

Environment

VMware ESXi 7.0.x
VMware ESXi 8.0.x

Cause

_{LUNs on the hosts would report VAAI primitives as unsupported, as the inquiry page 0xB0 is not being reported by the LUNs. Refer to data below for more details :}

_{Supported inquiry pages as reported by the target (storage array):}

#vsish
# cd /storage/scsifw/devices/naa.60###############00003f9/inquiryVPD/
#/storage/scsifw/devices/naa.60###############00003f9/inquiryVPD/> ls

/storage/scsifw/devices/naa.60##################802/inquiryVPD/> ls
0/
128/ <<== Page 0x80
131/ <<== Page 0x83
192/ <<== Page 0xC0
224/ <<== Page 0xE0
227/ <<== Page 0xE3

_{Since the Inquiry page 0xB0 is not reported by naa.600##################802, the support for VAAI primitives (Clone, ATS, Zero block and Delete block) is shown as “unsupported”.
This is a configuration issue on the storage array.}

_{If there is a working host where vaai primitives are supported, the below output would be seen:}

#vsish
# cd /storage/scsifw/devices/naa.60###############00003f9/inquiryVPD/
#/storage/scsifw/devices/naa.60###############00003f9/inquiryVPD/> ls
0/
128/ <<== Page 0x80
131/ <<== Page 0x83
176/ <<== Page 0xB0
192/ <<== Page 0xC0
224/ <<== Page 0xE0
227/ <<== Page 0xE3

 

_{Please note, after a power outage, all hosts may have the same impact, as they would have the same information propagated by the array after the outage.} 

Resolution

Engage the Storage vendor to investigate further.