VMware Cloud Community
vbox_nick
Contributor
Contributor
‎09-30-2008 03:27 AM

vmfs issue

We use your product virtualization ESXi 3.5 build 110180. To store data, we use the two disks ST3500630NS without RAID array. The system long enough to work stable, but one day we had a problem. One of the virtual machine was not available. The support team found that all the data from the disk disappeared. The server sees the disk, its size, and it shows that it used 130Gb, but I do not see files. If there are any ways to recovery the file system VMFS?. I ask you to help solve the problem. Thank you.

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2 Replies
wila
Immortal
Immortal
‎09-30-2008 03:34 AM

Without RAID array? Ack.. directly open a support ticket with VMware, they might be able to help you out OR be able direct you to a solution provider.



--

Wil

| Author of Vimalin. The virtual machine Backup app for VMware Fusion, VMware Workstation and Player |
| More info at vimalin.com | Twitter @wilva
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vbox_nick
Contributor
Contributor
‎09-30-2008 07:43 AM

Problem was solved.

http://theether.net/kb/100026

"LVM: 4903: vmhba0:0:0:1 may be snapshot: disabling access. See resignaturing section in SAN config guide."

Issue


When changing the host ID of a LUN ESX will fail to mount the LUN and present the following message on the ESX host console:
"LVM: 4903: vmhba0:0:0:1 may be snapshot: disabling access. See resignaturing section in SAN config guide."

Resolution


This is due to Logical Volume Management assuming that this is a snapshot LUN presented at a hardware level by the SAN.
To reset the LUN so it can be presented to ESX hosts:
- Ensure no ESX hosts are using/locking the LUN
In the Virtual Infrastructure Client:
- Select the ESX host- Select the Configuration tab- click on Advanced Settings- Select LVM in the left pane- Set LVM.EnableResignature to 1 and click OK- Click Storage Adapters- Click Rescan in the top right- Click OK- Click on Storage (SCSI, SAN and NFS)- The volume should now appear as snapshot-xxx- Right click and select Rename from the context menu- click on Advanced Settings- Select LVM in the left pane- Set LVM.EnableResignature to 0 and click OK
On the remaining ESX hosts:
- Select the ESX host- Select the Configuration tab- Click Storage Adapters- Click Rescan in the top right- Click OK- Click on Storage (SCSI, SAN and NFS)- The volume should now appear
Further Information:
SAN Configuration Guide[http://www.vmware.com/pdf/vi3_esx_san_cfg.pdf]
VMFS Volume Can Be Erroneously Recognized as a Snapshot[http://kb.vmware.com/kb/6482648]

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