On gio, 2008-02-28 at 12:54 -0500, Don Jerman wrote: > I've had problems with disk presentation order changing (fairly > randomly) when USB disks are attached during boot. Apparently there's > a race between the SCSI controller and the USB controller(s). If you > attach the USB disk later the SCSI stuff has all been discovered so of > course it gets allocated later in the list, but if it's attached while > booting the USB disk might come first or in the middle somewhere. > > This might lead to grub looking for its files in the wrong place, > which might explain the hang.
This is exactly what happens here. > > If you want to test this theory, boot from a CD while the USB is > installed and see where it winds up in /dev, then boot without it. Be > very careful about assuming drive identities! That's how I lost my > system disk last time -- /dev/sdb seemed to be partitioned funny and I > figured it out just a little too late. > I booted in a livecd and opened a grub command line. It reads my usb disk as (hd0,0). By the way I don't like this behavior and I need a solution to fix it. It is a laptop and I don't want to umount and unplug my usb disk every time I need to hibernate my system.
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