On Thu, Feb 12, 2009 at 11:53:40AM -0500, Greg Palmer wrote: > Ross wrote: > >I can also state with confidence that very, very few of the 100 staff > >working here will even be aware that it's possible to unmount a USB volume > >in windows. They will all just pull the plug when their work is saved, > >and since they all come to me when they have problems, I think I can > >safely say that pulling USB devices really doesn't tend to corrupt > >filesystems in Windows. Everybody I know just waits for the light on the > >device to go out. > > > The key here is that Windows does not cache writes to the USB drive > unless you go in and specifically enable them. It caches reads but not > writes. If you enable them you will lose data if you pull the stick out > before all the data is written. This is the type of safety measure that > needs to be implemented in ZFS if it is to support the average user > instead of just the IT professionals.
That implies that ZFS will have to detect removable devices and treat them differently than fixed devices. It might have to be an option that can be enabled for higher performance with reduced data security. -- -Gary Mills- -Unix Support- -U of M Academic Computing and Networking- _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
