on March 08, 2008 2:53 PM Arno Garrels wrote: > > About HDD: VmWare's HDD and Network drivers are very effective, > you're > > not losing too much performance by keeping your Virtual Machine > images > > on "ordinary" HDD's. > > I forgot to mention that I always turn off write ahead cache on the > drive that holds the system partition. That's most likely why it was so > much faster here when the VM files were on an extra drive. However > I'm rather unsure what will happen to the VM-Image files on power loss > when write cache is turned on at the host, I also don't know whether > turning it off in the guest OS would prevent the image from corruption.
I've never touched "write ahead" caching on my systems so it's "ON". Maybe that's why I received slightly better results. Then again none of our testing methods has been very scientific so the truth is somewhere in between. What I wanted to share is how VMWare seems to behave on "power loss": never had a problem. Also power losses aren't a frequent occurrence in my case I did get my share of power failures + an number of host computer lock-ups that forced me to power cycle the system. I never had a file system error. NEVER! And I did run "check disk" on quite a few occasions to be sure. This might be because it is a development machine. I do a lot of work with databases and the I/O system is stressed to its limits while the applications are running, but my applications are mostly NOT running (ie: sitting idle getting edited in Delphi). -- Cosmin Prund _______________________________________________ Delphi mailing list -> [email protected] http://lists.elists.org/cgi-bin/mailman/listinfo/delphi
