10-04-2002
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Join Date: Jul 2001
Last Activity: 16 June 2011, 4:50 PM EDT
Location: Portland, OR, USA
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Sharing partitions can be done, even as the OS loads, using the /etc/fstab file. You'll probably want to make the partition available only as data storage, since it's easier to make sure the filesystems are the same (ext2 is the safest in this case). If there are binaries, you may run into problems depending on the glibc versions used to compile them, and the library versions needed. They'd have to be so similar, it would take the point out of multi-booting.
If you want each to have it's own set of partitions, that'd be even better! Since the installation will set up partitions for you, just let it. I don't know how safe it is to use shared swap, either, but you may be able to share that.
For example, you could have it set up like this:
7.0 - / is hdb1, /usr is hdb2, swap on hdb3
7.3 - /boot is hdb4,/ is hdb5,/usr is hdb6, swap on hdb7
Or however you felt like setting it up...
Through the magic of extended partitions, it could work just fine!
Besides, why Redhat 7.0 and 7.3 on the same box? They're close enough that it's almost like having the same thing on there twice!
