using VMWare multi-writer VMDK for shared storage in a clustered environment

[madx86]

Does Open VMS x86 v9.2- *support sharing a the VMDK (virtual machine disk) on more than one VM using multi-writer option in VMware ?”
Below articles explains how Oracle RAC cluster shares the same VMDK in a clustered setup in VMware . we are checking if OpenVMS supports something similar for shared storage within a cluster .
As we do not have Fibre channel currently and This method of shared storage doesn’t need a Fibre Channel . we are looking for some feedback from VSI if this method has been tested or supported ? . Thank you .

Enabling simultaneous write using multi-writer :
https://knowledge.broadcom.com/external ... Id=1034165

Oracle RAC on a vSAN using shared VMDK :
https://knowledge.broadcom.com/external ... Id=2121181

[pocketprobe]

VSI Wil still have to chime in if they support this or not, or how much validation has been done but trying things as a hobbyist this does work... at least in KVM, even with the SATA controller.

[madx86]

thank you , will wait for some feedback from VSI .

in the interim can you please post the output of the below command from all the three of your nodes ? . I am expecting to see a "Mnt cnt" of 3 in the output of the below command to confirm the below disk is shared on all the nodes .

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$ SHOW DEV $1$DKA0:

[pocketprobe]

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$ show sys/nopr
OpenVMS V9.2-2  on node AVALON   11-MAY-2024 16:09:27.35   Uptime  0 00:08:45
$ SHOW DEV $1$DKA0:

Device                  Device           Error   Volume          Free  Trans Mnt
 Name                   Status           Count    Label         Blocks Count Cnt
$1$DKA0:      (AVALON)  Mounted              0 X86SYS        420155792   126   3

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$ show sys/nopr
OpenVMS V9.2-2  on node RAMSEY   11-MAY-2024 16:10:16.35   Uptime  0 00:08:43
$ show dev $1$dka0:

Device                  Device           Error   Volume          Free  Trans Mnt
 Name                   Status           Count    Label         Blocks Count Cnt
$1$DKA0:      (RAMSEY)  Mounted              0 X86SYS        420155792   128   3
$ 

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$ show sys/nopr
OpenVMS V9.2-2  on node MORDOR   11-MAY-2024 16:10:50.03   Uptime  0 00:20:44
$ show dev $1$dka0:

Device                  Device           Error   Volume          Free  Trans Mnt
 Name                   Status           Count    Label         Blocks Count Cnt
$1$DKA0:      (MORDOR)  Mounted              0 X86SYS        420155792   126   3
$