RAID 5 write speed?

[mateo]

Ive heard that RAID 5 writes are slow, due to writing parity etc. Can anyone show me how slow they get vs a single non-RAID drive, and if the slowness will increase or decrease with a greater number of disks in the array?

[toastedzergling]

http://www.anandtech.com/storage/showdoc.html?i=1491

[mateo]

Edit: nm