Re: [CentOS] Best mkfs.ext2 performance options on RAID5 in CentOS 4.2

On Mon, 31 Oct 2005 at 4:10pm, Sean Staats wrote

I can't seem to get the read and write performance better than approximately 40MB/s on an ext2 file system. IMO, this is horrible performance for a 6-drive, hardware RAID 5 array. Please have a look at what I'm doing and let me know if anybody has any suggestions on how to improve the performance...

System specs:

2 x 2.8GHz Xeons 6GB RAM 1 3ware 9500S-12 2 x 6-drive, RAID 5 arrays with a stripe size of 256KB. Each array is 2.3TB after formatting. ioscheduler set to use the deadline scheduler.

Make sure you are using the absolute latest firmware for the 3ware board (2.08.00.005). There is a bad cache allocation bug in previous firmwares that kills performance with more than one unit (as you have).