Installing solaris on 2 hard disks (not raid or mirroring)

I'm installing solaris 10 but with 2 hard disk this time. Primary IDE is 20GB and secondary is 30 GB. I want to use both the disks for one solaris installation. That is i want to distribute my /, swap, /usr, /opt, /var etc. over the two hard disk, for example making swap, / and /var on the first hard drive and /opt, /usr and other slices on the 2nd hard disk.
During installation when i select the first drive to use for solaris it deselects the other and when i select the second disk it deselects the first one. Kindly help me out on this.

I'm not asking for the best solution because i
understand it depends on the use. I was asking for
basic reasoning or logic. For example what if i make
/ partition of 20GB and make /opt only 200MB? or
/export/home only 50MB and /usr 25GB? or /var only
10MB? Will more than 90% knowlegdable experienced
system administrators will agree to that kind of
partitioning scheme?This might sound nit picky but it's not meant that way, but!, who gets to decide what is & what is not a knowlegdable experienced system administrator? Unless I've worked with you I have no idea on your reasoning or how or why you do things. On the flip side, what if I'm the dufus admin then even though you're right I think you're wrong.
truth i never undestood the logic or reasoning on how
much space each partition should have according to
the size of the space avaiable as well as the use of
system.That's why these things end up being religious.
I understand that one must learn by experience but
doesn't one should make educated well reasoned
judgements even during learning phase?In this case I never went near that.
The installer gives you a set of parameters during an initial install. You CAN take it or leave it.
docs.sun.com gives you a default scheme which you can take it or leave it.
If you search around enough you can find the rationale to support any decision that you make.
In the next version of Solaris, ZFS is reportedly going to ship.
How does this affect your question?
With ZFS specified filesystems will pull from a common storage pool. As long as the pool has space, any partition that needs space from that pool will automatically get it.
Then threads like this one should start to fade into the past.
Stated another way, if your partitioning scheme works for you then who's to say it's wrong?
alan

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