Error when attempting to open VMDK

Hello experts,

I am getting the current error with my VM on Windows 2008 R2

Cannot open the disk '/vmfs/volumes/55fb6cc5-06834bbb-558f-009c02a8359a/AJSWAN001/AJSWAN001_5.vmdk

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I have to run to a meeting, but I can provide additional details, just let me know.
Arnold SwanAsked:
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Andrew Hancock (VMware vExpert / EE Fellow)VMware and Virtualization ConsultantCommented:
does the disk exist ?

is the disk corrupted ?
Murali SripadaVMware Engineer | vExpert 18/19Commented:
get the vmkernel.log please
Arnold SwanAuthor Commented:
does the disk exist ? The answer is no it doesn't
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Arnold SwanAuthor Commented:
get the vmkernel.log
I am on the ESXi cmd line and that cmd didn't work
Andrew Hancock (VMware vExpert / EE Fellow)VMware and Virtualization ConsultantCommented:
is the datastore missing?

that's not a command, it's a statement.
Arnold SwanAuthor Commented:
No. But my my disks 2-4 Failed.
Andrew Hancock (VMware vExpert / EE Fellow)VMware and Virtualization ConsultantCommented:
You've got Volume 1 in RAID 0. (Disk 1)

You've got Volume  2 in RAID 0 (DIsk 2,3,4)

You've got no resilience.

and your Datastore is now corrupted.

Replace Disks 2,3 and 4, create at least RAID 5 (which is now defunct, recommended RAID 6).

and Rebuild the Datastore and Restore your backups.

To be honest with you, I would purchase

1. 4 x 4TB disks.
2. Create a RAID 6 Array.
3. Purchase SD card or USB flash drive.
4. Re-install ESXi to this SD card or USB flash drive.
5. Restore VMs.

You've then got a RAID 6 resilient datastore and ESXi running from flash.

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Arnold SwanAuthor Commented:
I will reach out to you when I am ready. Thanks for your advice.
You'll probably find it was set up as RAID 0 because they bought a P212/ZM which is limited to RAID 0/1/10. Also 4TB suggests they have LFF disks and that server can only take 4 of them unless you use the DVD/tape drive slots to mount non-hotplug disks in and mess about with cables.

At least they could remove the 300GB one to put another 4TB one in its place and use RAID 10. Presumably that's the disk with the hypervisor on and it does have an internal USB port they could boot VMware from.
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