axacheng,
Promise Technology has a good card, SX6000. It supports up to 6 ide drives in RAID5. I don't remember if it came with a Linux driver but their web site (www.promise.com) has drivers for a couple of flavors of Linux. There is also source code. Here is the link: http://www.promise.com/support/mix_dwn_eng.asp?product_id=86&family_id=2 My customer used it with 6 - 120G drives on a W2K box.
i am using this very controller with four 180GB drives on a linux (debian/woody) box.
had not had any problems yet (it's 1 month old)
mfg.ads.r IOhannes
