I've seen quite some file system problems with totally screwed up directories when storing the virtual machines on a ReiserFS system when running GSX 3.2, but haven't been digging into it really. Is ReiserFS an issue with virtual machines in general? Is it the way VMware works?
The last problem I had I had to run reiserfsck --rebuild-tree on the partition, and when done, I had a complete directory structure on the partition that was \*NOT* the before! Plus 20000+ entries in lost+found... And the weirdest thing is that the directory structure was a complete copy of on of the VIRTUAL machines!
So, I checked the FAQ on namesys.com and I found this post:
Can I use VMWare with ReiserFS?
VMWare was tested on SuSE Linux with Win98 Guest OS on the ReiserFS partition. There's one trick at the beginning: to the config file was added the following line
host.FSSupportLocking1 = 0x52654973
(0x52654973 == *(u32 *) "ReIs")[/i]
Is this some known problem? Should ReiserFS be avoided for VMs? What's recommended instead? JFS, XFS? The host is a SuSE 10.0 x86_64 SMP with 2 Opterons.