Datastore is inaccessible from ESXi
Article ID: 393246
Updated On:
Products
Issue/Introduction
1. The datastore is not mounted to the ESXi host/s
2. The datastore becomes inaccessible from the host/s
3. The datastore presentation from the storage array to the host is visible
4. VMs running on the specific datastore become invalid or start displaying their storage paths
VMkernel.log:
2025-03-27T15:35:26.403Z In(182) vmkernel: cpu45:2098107)FS3: 662: and upload the dump by `voma -m vmfs -f dump -d /vmfs/devices/disks/naa.################################:1 -D X`
2025-03-27T15:35:27.201Z Wa(180) vmkwarning: cpu47:22823187)WARNING: FS3: 636: VMFS volume Datastore-A/67853411-########-####-52d075400070 on naa.################################:1 has been detected corrupted
2025-03-27T15:44:33.012Z In(182) vmkernel: cpu30:2097642)NFS: 1929: Invalid volume UUID naa.################################:1
2025-03-27T15:44:33.023Z In(182) vmkernel: cpu30:2097642)FSS: 6407: No FS driver claimed device 'naa.################################:1': No filesystem on the device
Environment
VMware vSphere ESXi
Cause
The datastore or LUN has been reformatted by another operating system for data usage by a user or automation software.
[root@Esxi:~] partedUtil getptbl /vmfs/devices/disks/naa.################################ (Datastore-A)gpt783250 255 63 125829120001 2048 12582909951 EBD0A0A2B9E5443387C068B6B72699C7 linuxNative 0 - The format has changed from vmfs to linuxNative
[root@Esxi:~] partedUtil getptbl /vmfs/devices/disks/naa.################################ (Datastore-B) gpt2088666 255 63 335544320001 2048 33554431966 AA31E02A400F11DB9590000C2911D1B8 vmfs 0
|
Partition
|
GUID
|
Type (Hex)
|
Type (Decimal)
|
|
VMFS Datastore
|
AA31E02A400F11DB9590000C2911D1B8
|
0xFB
|
251
|
|
Basic Data
|
EBD0A0A2B9E5443387C068B6B72699C7
|
0x83
|
131
|
Resolution
To ensure the datastore is not overwritten with another filesystem partition double/triple check the device being selected before reformatting. If a reinstall of ESXi is required un-present all datastores from the host before doing the reinstall to ensure the wrong device is not accidentally selected.
Once the datastore has been reformatted there is no recovering from this. You can either restore VMs from backups or contact Data recovery services for data not recoverable by VMware Technical Support (326764). To prevent additional data loss, VMware advises contacting a data recovery company promptly without making any changes to determine if they can help.
Feedback
