> I have been experimenting with setting up a raid array on 3 > new drives that are each capable of about 180 MB/s throughput. I guess that if this a rotating disk drive "capable" is intended here in the marketing sense of "cannot exceed". :-) > I have tried raid5 and raid10 in both offset and far layouts > using both 64k and 512k chunk sizes, and the resync speed > seems to always be significantly less than the throughput of a > single drive, even after I write 500,000 to sync_speed_max. > The fastest of the bunch was raid10 in far mode, at ~140 MB/s, > and the rest were around 110 MB/s. The output of 'iostats -dx 1' might be interesting. :-) Also as to RAID5 you might want to look at 'man mdadm' the paragraph beginning "When creating a RAID5 array". -- 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
