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

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Article ID: 387788

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Updated On:

Products

VMware vSphere ESXi

Issue/Introduction

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.

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.