I recently had a problem with ESXi, forcing the server to reboot.
I received an answer after VMware SR.
They said storage was under load and that the storage was lock , and so HA is not operated
They said answer is disable ATS.
However, I know that ATS Disable affects storage performance from blog
What is the difference between disable ATS and disable ATS Heartbeat?
What happens when only Disable ATS Heartbeat ?
Storage is EQ6210 (iSCSI).
I don't know if this storage supports ATS or not
Hi,
You can show more information about your LUNs with this command line from an ESXi. if ATS is supported or not
# esxcli storage vmfs lockmode list
Please, look at this documentation as well : VMFS Locking Mechanisms
Thank you,
The EqualLogic support ATS Locking..
[root@esx-node-97:~] esxcli storage vmfs lockmode listVolume Name UUID Type Locking Mode ATS Compatible ATS Upgrade Modes ATS Incompatibility Reason
----------- ----------------------------------- ------ ------------ -------------- ----------------- --------------------------
grp-01-001 50018f37-09ffc5fc-dd29-d4ae528ea003 VMFS-5 ATS true No upgrade needed
grp-01-002 500fe112-41f63236-46aa-d4ae528e8772 VMFS-5 ATS true No upgrade needed
grp-01-007 52cbe217-a0892105-f3b4-e0db5515edee VMFS-5 ATS true No upgrade needed
Its also on the HCL VMware Compatibility Guide - Storage/SAN Search if you expand your FW level and take a look to VAAI.
Regards
Joerg
Hi,
ATS is better than ATS+iscsi
You can verify VAAI support with this command :
# esxcli storage core device vaai status get
And which plugin is used with this one
# esxcli storage nmp device list
Be careful if you are in production environment and you would like to change nmp or SATP plugin
Thank you,
Regards,