The recommended setup for doing RAID0 with ATA drives is that each hard drive should be on its own IDE channel. The reasoning is so they can operate concurrently... i.e. if you put them in a master-slave configuration on the same channel, you lose the benefits of striping since both drives cannot use the channel at the same time and have to wait for the others' read/write to finish first. QUESTION: Is this really accurate? Is the md driver smart/multi-threaded enough to read/write ahead non-consecutive sectors simultaneously? When writing, for example, the 1st to 4th chunks of a file across a striped two-drive array, would it write the 2nd and 4th chunks on one drive without waiting for the 1st and 3rd chunks to finish writing on the other? If it can't, and the writes have to proceed in sequence/lockstep, how can putting the striped drives on separate channels help? -- reply-to: a n d y @ n e o t i t a n s . c o m - 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
