RAID 5 faster than RAID 1

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Hi,

I have a dual PIII-450 with 256MB of RAM here. I would like to build a
RAID 5 array with 3 9,1GB SCSI disks - each on its own channel. Will the
machine be powerfull enough to give a "fast" access to the disks?
Or should I go for a 20GB RAID 1 level?
Will the performance increase with more RAM?
Better use reiserfs or xfs on RAID?

Thanks in advance

   Gernot A. Weber

-- 
Gernot A. Weber
http://www.tux-web.de

Only wimps use tape backup: _real_ men just upload their important stuff
on ftp, and let the rest of the world mirror it.

                              Linus Torvalds, after a hard drive crash

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