For most fileshares raid 5 will yield acceptable performance. I'd also suggest to make one drive a hotspare.   Raid 6 gives a bit more reliability at the cost of losing one more drive to the second parity. Raid 6 is a bit slower on writes than raid 5 though.
Hi, Our respected customer buy one MD1000 with all HDD 600GB.  He wants to know what is best practive to Make Raid Group? For example 5 Disk 1st Raid-5 Group  &  9 Disk 2nd Raid-5 Group   &  One HotSpare....... OR  Make 1 HotSpare and remaining all in one RAID-5 group. What is the good recommended configration please guide us. Waiting for your response. With Thanks & Regards Asim
In MD1000: What is best practice for RAID Group?