On Tuesday June 5, jnelson-linux-raid@xxxxxxxxxxx wrote: > > I have an EPoX 570SLI motherboard with 3 SATAII drives, all 320GiB: one > Hitachi, one Samsung, one Seagate. I built a RAID5 out of a partition > carved from each. I can issue a 'check' command and the rebuild speed > hovers around 70MB/s, sometimes up to 73MB/s, and dstat/iostat/whatever > confirms that each drive is sustaining approximately 70MB/s reads. > Therefore, 3x70MB/s = 210MB/s which is a bunch more than 133MB/s. lspci > -v reveals, for one of the interfaces (the others are pretty much the > same): ... > > I'm trying to determine what the limiting factor of my raid is: Is it > the drives, .... If look at the data sheets for the drives (I just had a look at a Seagate one, fairly easy to find on their web site) you should fine the Maximum Sustained Transfer Rate, which will be about 70MB/s for current 7200rpm drives. So I think the drive is the limiting factor. NeilBrown - To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
