Update to Mac OS X 10.5.5 to avoid potential data loss...

Update to Mac OS X 10.5.5 to avoid potential data loss...

Optimize Performance for Mac or VM?

Many of our users are probably familiar with the setting under VMware Fusion Preferences that lets users determine if they want to optimize for virtual machine disk performance, or optimize for performance of their Mac OS applications.

The way this works is that, by default, VMware Fusion “optimizes for virtual machine disk performance” with the tradeoff of using more of your Mac’s memory. Conversely, if you “Optimize for Mac OS application performance” VMware Fusion uses less of your Mac’s memory, but can decrease performance of your virtual machines—a tradeoff that some users are willing to take.

Apple Issue with Unbuffered IO

“Optimizing for Mac OS applications performance” works via enabling what is called “unbuffered IO.” The problem is that there is an Apple problem with unbuffered IO that can cause your virtual machine, or your entire OS, to hang at some points. If this occurs, your virtual machine disk can get corrupted, which, of course, we want to avoid at all costs.

Apple has now resolved this bug with Mac OS X 10.5.5. Feel free to update to Mac OS X 10.5.5 as appropriate to workaround this problem.

Comments

Excellent! I am really glad to see Apple resolve this bug (finally!).

Well this had the opposite effect for me my virtual machine which was running fine until I updated now hanges on 'Restoring virtual machine state'

Be warned!

I just experienced data loss, despite running OS X 10.5.5 as well as having the optimize of virtual disk performance toggled. I'm a bit upset because I lost a lot hard work. Maybe I shouldn't have trusted Fusion to managed my virtual disk but it seems to me that it did everything it could. I totally blame Apple and I'll tell you, I'm dangerously close throwing OS X out-the-window for good. This sort of shit has never ever happened to me with Windows and at this point with regards to Windows I think Microsoft, in every way is superior to Apple. Apple may have awesome designs but this can not be tolerated nor can it go unpunished. I really wish Apple got flamed for once, their business practice is far from tolerable and heavenly. Microsoft get's a whole lot of undeserved discredit Apple deserves a big kick in the butt.

What I think happened here is that I completed basically all of my work, then shut down Fusion. Okay, but I don't shut down my computer because it might as well sleep, it's just easier if I have to access something quickly. But then the USB broadband modem driver (I don't like this much, but I have no choice at the moment) crashed basically everything. The OS enters a state of unresponsiveness and refuses to interact with the UI, I can drag around Windows but I can't launch a single process. This has happened several times and it's so damn annoying you know? I have to power down the computer and I'm thinking a lot of that work I was finished with was laying around somewhere in a memory mapped file.

So the power goes away taking all that binary work with it. Whom ever engineered IO at Apple should be shot on sight because this kind of data loss is far from tolerable, it's the worst kind of problem.

I bought Fusion because it let me enjoy the best of both worlds but now? What am I supposed to do? Accept this and simply keep putting up with ridiculous Apple defects or boot camp my way back into something which certainly won't leave me hanging like this ever again.

I'm off to do damage control.

Fusion isn't fuse-ing for me either!I get the unexpected (of course)! error 10 no work no more message.new machine new install new vmwahh program no work no mo!!!!!!!!!!!!!!Unexpected signal: 10.

A log file is available in "/Virtual Machines.localized/Windows XP Home Edition.vmwarevm/vmware.log". Please request support and include the contents of the log file.

To collect data to submit to VMware support, choose "Collect Support Information" from the Help menu.

You can also run "/Library/Application Support/VMware Fusion/vm-support.tool" directly.

We will respond on the basis of your support entitlement.

Version history
Revision #:
1 of 1
Last update:
‎07-17-2008 12:08 PM
Updated by: