Hi folks, In some prior posts, I've talked about trying to get four IDE drives in a Firewire case working. Yesterday, I bailed out due to hangs, filed 6539587, and moved the drives inside my Opteron box, hanging off one of these:
http://www.newegg.com/Product/Product.asp?Item=N82E16816124001 Now, I know the single IDE controller is going to be a bottleneck, but let me tell you how slow it is. Last night, after moving the drives, I started a scrub. It's still running. At 20 hours, I was up to 57.75%, and had 14.5 hours left. That's for a pool that's 341Gb, so the scrub has to access 341 * 4 / 3, or 454Gb. I make that something under 4 Megabytes per second. That's not just slow, it's pathological. I was easily getting 10-20X from this pool in the external case. Where do I get started at diagnosing this? I don't know much about watching I/O throughput. For yet-another-fallback, I am thinking about using SATA-to-IDE converters here: http://www.newegg.com/product/product.asp?item=N82E16812156010 It feels kind of nuts, but I have to think this would perform better than what I have now. This would cost me the one SATA drive I'm using now in a smaller pool. Rob T _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
