Is it possible to mount an entire disk device read only?

[Karl Auer]

While looking at another poster's issue I started wondering whether it
is possible to attach an entire hard disk drive in read-only mode.
Mounting a partition read-only is easy, but I'm not talking about
partitions here - I mean the entire drive.

That is, can I have a read-only /dev/sdb?

Regards, K.

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Karl Auer (kauer at biplane.com.au)
http://www.biplane.com.au/kauer
http://twitter.com/kauer389

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