VMware Consolidated Backup, LInux Machines go read-only

We have a strange problem, the scenario is as follows:

3 knots x 3650, hba qlogic, Vmware 3.5 Update 4

1 SATA ds3400 dual ctrl

1 x 3650 dedicated to the VCB nodes

A lot from time to time, virtual Linux machines, VCB has completed the backup, rest with the read-only file system, the only chance to solve the problem is to restart the virtual machines: we already checked the vmware tools and are all up to date.

Any suggestions?

Thank you very much

As a general rule, it is not realistic to adjust the waiting times for the LSI or buslogic drivers scsi as they would need to be recompiled. To my knowledge there is no kernel option, you can pass to them on this issue. Some versions of redhat specifically deal with it is bad and flipping in read-only mode. I think RHEL 4 U4 and precedent are touched by this, U5 has been set, and the problem was inexplicably re-introduced in U6 (I hope those updated numbers are right, I have to look back through my SRs to understand). If I were you, I would look at the upgrade to vSphere 4 that has a couple of cool things.

1. new options scsi (LSI SAS, paravitual SCSI driver pvscsi virtual controller)

2 VMFS 3.33 (which will require you to reformat your LUN with the new VMFS however) has up-to-date SAN attempts, which means that wait times do not necessarily make the LSI/Buslogic controller in the first place and will be dealt with at the level of the VMFS layer. It is possible that you could put a LUN with the VMFS 3.33 using host vSphere 4.0.0 and not spend the rest of your hosts, but I'm not positive on this one here.

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