[Bug 425112] Re: error: cannot open `/dev/sdb' while attempting to get disk size - grub2 update

[Ralph]

I had a similar problem with 4 drives, the last being an external USB
hard drive. Under Jaunty it is named sdd (by os-prober) while under
Karmic it is named sdh (again using os-prober); however, the device.map
for Karmic still lists it as sdd. Whenever I run update-grub I get all
the same "cannot open `/dev/sdd' ..."errors and later get a grub probe
error "Cannot find a GRUB drive for /dev/sdh3. check your device map". I
changed device.map under Karmic to sdh (for grub drive hd3) and ran
update-grub  without errors. The second install of Karmic on sdh also
booted.

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error: cannot open `/dev/sdb' while attempting to get disk size - grub2 update
https://bugs.launchpad.net/bugs/425112
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