We are in the process of migrating from a v5030 to a FlashSystem 5300. I'm the storage/linux administrator , so excuse my ignorance with vmware.

We are using PBHA with the new FlashSystems, we have two, at release 8.7.3.3.  I was given this question by our vmware administrators:

We aren't seeing the option to Enable "Clustered VMDK" on the new LUNS in vmware. Checked the requirements via the article below and doesn't look like WEAR reservations are supported. Is there a setting on your side that would need adjusting?

Clustered vmdk datastore LUN support check

I'm assuming this may be because there are no clusters with PBHA at this time.

If anyone has any thoughts on this, it would be greatly appreciated.

Thanks,

Eric

Hi Eric, 

SCSI Persistent Reservations with policy-based high availability is supported in that code version so it's odd that it's showing as unsupported. 

The Broadcom article you've linked to has three criteria:

• Support SCSI-3 reservation type WEAR (i.e., write exclusive all registrant)
• Support ATS commands
• Have 512/512e sector size disks

and all of these are supported in this code version with PBHA.

Please open a support ticket so we can take a look at what's going on.

Thanks,

Chris

We are in the process of migrating from a v5030 to a FlashSystem 5300. I'm the storage/linux administrator , so excuse my ignorance with vmware.

We are using PBHA with the new FlashSystems, we have two, at release 8.7.3.3.  I was given this question by our vmware administrators:

We aren't seeing the option to Enable "Clustered VMDK" on the new LUNS in vmware. Checked the requirements via the article below and doesn't look like WEAR reservations are supported. Is there a setting on your side that would need adjusting?

Clustered vmdk datastore LUN support check

I'm assuming this may be because there are no clusters with PBHA at this time.

If anyone has any thoughts on this, it would be greatly appreciated.

Thanks,

Eric

Chris,

Thank you for your reply. I have opened a case and will update the thread with their response.

Eric

Hi Eric, 

SCSI Persistent Reservations with policy-based high availability is supported in that code version so it's odd that it's showing as unsupported. 

The Broadcom article you've linked to has three criteria:

• Support SCSI-3 reservation type WEAR (i.e., write exclusive all registrant)
• Support ATS commands
• Have 512/512e sector size disks

and all of these are supported in this code version with PBHA.

Please open a support ticket so we can take a look at what's going on.

Thanks,

Chris

We are in the process of migrating from a v5030 to a FlashSystem 5300. I'm the storage/linux administrator , so excuse my ignorance with vmware.

We are using PBHA with the new FlashSystems, we have two, at release 8.7.3.3.  I was given this question by our vmware administrators:

We aren't seeing the option to Enable "Clustered VMDK" on the new LUNS in vmware. Checked the requirements via the article below and doesn't look like WEAR reservations are supported. Is there a setting on your side that would need adjusting?

Clustered vmdk datastore LUN support check

I'm assuming this may be because there are no clusters with PBHA at this time.

If anyone has any thoughts on this, it would be greatly appreciated.

Thanks,

Eric

If a VMFS filesystem was in place at the volume (so already mapped and formatted) previously you update to 8.7.3.x I believe it wont update WEAR support on VMware. I would try first rebooting the hosts, if no success unmap and map back the volume, if still no Clustered VMDK support, present a new volume to check, you will see if the device supports while creating the datastore on it. 

Chris,

Thank you for your reply. I have opened a case and will update the thread with their response.

Eric

Hi Eric, 

SCSI Persistent Reservations with policy-based high availability is supported in that code version so it's odd that it's showing as unsupported. 

The Broadcom article you've linked to has three criteria:

• Support SCSI-3 reservation type WEAR (i.e., write exclusive all registrant)
• Support ATS commands
• Have 512/512e sector size disks

and all of these are supported in this code version with PBHA.

Please open a support ticket so we can take a look at what's going on.

Thanks,

Chris

We are in the process of migrating from a v5030 to a FlashSystem 5300. I'm the storage/linux administrator , so excuse my ignorance with vmware.

We are using PBHA with the new FlashSystems, we have two, at release 8.7.3.3.  I was given this question by our vmware administrators:

We aren't seeing the option to Enable "Clustered VMDK" on the new LUNS in vmware. Checked the requirements via the article below and doesn't look like WEAR reservations are supported. Is there a setting on your side that would need adjusting?

Clustered vmdk datastore LUN support check

I'm assuming this may be because there are no clusters with PBHA at this time.

If anyone has any thoughts on this, it would be greatly appreciated.

Thanks,

Eric

Thiago,

   Thank you very much for your response. It worked. I couldn't reboot the server as it's in production, but both creating 

a new volume, and un-mapping and remapping the hosts to a current volume both worked. And yes, that was the situation that we did the code upgrade after the volumes had been created. Again, thank you very much.

Eric 

------------------------------
Eric Derr

Original Message:
Sent: Tue August 19, 2025 02:12 PM
From: Thiago Lucas
Subject: Policy Based HA and VmWare

If a VMFS filesystem was in place at the volume (so already mapped and formatted) previously you update to 8.7.3.x I believe it wont update WEAR support on VMware. I would try first rebooting the hosts, if no success unmap and map back the volume, if still no Clustered VMDK support, present a new volume to check, you will see if the device supports while creating the datastore on it. 

------------------------------
Thiago Lucas

Original Message:
Sent: Mon August 18, 2025 12:26 PM
From: Eric Derr
Subject: Policy Based HA and VmWare

Chris,

Thank you for your reply. I have opened a case and will update the thread with their response.

Eric

------------------------------
Eric Derr

Original Message:
Sent: Fri August 15, 2025 06:27 AM
From: Chris Bulmer
Subject: Policy Based HA and VmWare

Hi Eric, 

SCSI Persistent Reservations with policy-based high availability is supported in that code version so it's odd that it's showing as unsupported. 

The Broadcom article you've linked to has three criteria:

• Support SCSI-3 reservation type WEAR (i.e., write exclusive all registrant)
• Support ATS commands
• Have 512/512e sector size disks

and all of these are supported in this code version with PBHA.

Please open a support ticket so we can take a look at what's going on.

Thanks,

Chris

------------------------------
Chris Bulmer

Software architect, IBM Storage Virtualize

Original Message:
Sent: Thu August 14, 2025 01:19 PM
From: Eric Derr
Subject: Policy Based HA and VmWare

We are in the process of migrating from a v5030 to a FlashSystem 5300. I'm the storage/linux administrator , so excuse my ignorance with vmware.

We are using PBHA with the new FlashSystems, we have two, at release 8.7.3.3.  I was given this question by our vmware administrators:

We aren't seeing the option to Enable "Clustered VMDK" on the new LUNS in vmware. Checked the requirements via the article below and doesn't look like WEAR reservations are supported. Is there a setting on your side that would need adjusting?

Clustered vmdk datastore LUN support check

I'm assuming this may be because there are no clusters with PBHA at this time.

If anyone has any thoughts on this, it would be greatly appreciated.

Thanks,

Eric

------------------------------
Eric Derr
------------------------------