How To: Freeze Finder
Want to lock up OS X? Of course you do! When friends with Windows complain that Macs don't have all the features of PC's, you can whip out this little trick to show then that, yes, OS X can lock up just as tight as Windoze. How? You'll need two Macs: one can be any kind of Mac, the other has to be a laptop (also a Mac). First, mount a network volume onto the laptop any way you like. I have a Mac mini in the den we use as a file server (amongst other things). I mount one big honkin' USB drive on all our laptops (three iBooks, a Macbook Pro, and a Macbook) and use it as our Backup.app drive. Next, close the laptop. This puts it to sleep, and "freezes" the state of the machine. Step three involves driving/biking/running as far away from your home network as possible. For this to really work, you'll want to get near another WiFi network. Now here's the tricky part. Upon opening the laptop, quickly navigate to the Finder and open a new window. Anything to access the Finder, essentially, and prompt it to start looking for that (now missing) network volume. During this, the Mac will be scouring the airwaves for a new signal. Upon finding one, it'll ask to join. Say yes, and if you've got your Airport strength in your menu bar, you'll see the name of the network start to scroll across. For me, that's where the party ends.
I've tried this on all flavors of Tiger, on a G3, G4, and Intel-based laptop, and it all does the same thing: rainbow wheel and lock up. Once I left my G4 iBook on for 4 hours, and Finder never recovered. No key combos will return sanity, just a floating wheel, with no other response from the OS. Not even CPU gauges update! The only solution is to hold down the power key and reboot. Who says PC users get all the fun? You'd think with UNIX being built for networking...
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Want to lock up OS X? Of course you do! When friends with Windows complain that Macs don't have all the features of PC's, you can whip out...
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Same thing happens in UNIX. In FreeBSD, mount a NFS drive from a server. Now shutdown the server. From an Xterm, do a "df -h" or similar command that tries to access the NFS. The Xterm freezes indefinitely, or until the NFS drive is alive again.
October 17 2006 at 11:46 AM Report abuse Permalink rate up rate down ReplyYes, it's very annoying, and yes, I really want it to be fixed...
...but it's not that bad to wait two to three minutes for the Finder to realize the missing network volume ain't coming back, present a dialog box, and let you move on with your work. No lost work, no relaunching all your apps, no reopening your docs... all of which can longer than three minutes anyway.
(If there's some variant that will lock up the system "permanently" until a forced restart, I haven't personally suffered that.)
I second those who point out this is not new. Network shares, including printer shares, have been weak since OS X 10.0. The situation improves a bit with every major revision. If you ever get a dialog offering a choice between disconnecting a share and reconnecting, ALWAYS disconnect.
It must be something wonky deep in a part of the OS nobody wants to touch. Apple keeps whittling away at the problem. I suspect 10.5 will be a bit better, and 10.6 still better ...
I have been irritated by this same problem for so long. However the problem is not just AFP. I just ranted about this:
http://www.anyware.co.uk/2005/2006/10/03/macs-do-freeze-apple-please-improve-mount-handling/
I have seen OS X do the same thing when bad CDs are inserted, and when shared AFP volumes have some corrupt data (I assume - SMB on same remote volume is fine)
Agreed, my external firewire drives are constantly locking up all my macs i've tried it on..
I know an easier solution
Use safari and view a webpage
Beach Ballin for hours.
I HAVE had this happen with SMB shares. Not over wireless, as I don't have a wireless network at work, but with wired, if I forget to disconnect the drive before I pull either the iBook's or the other computer's network cable out.
Fucking pain in the ass.
just pop over to a terminal and sudo umount -f the offending volume works every time. But it is *REALLY* annoying (nfs seems better behaved though)
When I first got my MacBook pro, I mentioned frequent lockups in a blog post. It was days before I figured out that this exact problem was the cause.
Take heart because it may not be your machine causing the problems after all. Several Mac enthusiasts had very rude words for me about said blog post. Apparently if you crash your Mac, the fault lies entirely with the user. Words to live by.
No network required. Drop some 500 to 1000 hi-res images into a folder. Set the folder to icon view, largest size. Copy it from anywhere to the desktop or vice versa. Close your laptop before the new folder has built-up; it never will, now.
August 03 2006 at 3:31 AM Report abuse Permalink rate up rate down ReplyHot Apps on TUAW
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