[ Please do not address answers directly to me; I read the list. ] * Scott T. Smith (scott@xxxxxxxxxxxxxx) [20041015 11:21]: > You know what, I think I was wrong -- we have the 8506. Sorry, > my bad. And ours is SATA, not PATA (is that the difference > between the 7xxx and 8xxx?) Yes. > There are other reasons the Highpoint is better than the 3ware, > including the fact that it instantly recognizes when you yank a > disk, unlike the 3ware which sits there for a while, and then > hard resets the entire controller (thus halting all disk io to > that controller for a couple of seconds). 3ware wrote me back > and told me it's supposed to do that! Cannot comment on this one, never was a problem for us. > Is the 9500 a PCI-X card? No, it's 64-bit 66 MHz PCI. http://www.3ware.com/products/pdf/9000DS_041904.pdf > [...] and we get the same crappy performance from that one too. Define `crappy': I get 770 MiB/s read with 3x 3ware 9500S-8MI. (RAID00 hw-sw) > Worse yet, the 9xxx series wants to hijack your disks unless you > go out of your way to enable 'export JBOD' mode. You can't take > a disk from a 9xxx controller and put it in a box with an 8506 > -- the controller won't recognize it! Have you tried zapping the first and the last megabyte of the disk? > BTW I'm not talking about RAID or filesystem performance, I'm > talking about direct disk access, JBOD mode, using rather large > blocks. Direct disk access gives me nominal disk throughput on 3ware. > So really all I want is multiple controllers on a single card. > To that end, the 1820a works great. I figure we'd all be > running software RAID anyways ;-) As I said, attractive pricing. Cannot get stellar hardware RAID performance with crappy chipsets. :-) There's a turnover point where you are killed by PCI bandwith limit when using a lot of disks. Peter -- .+'''+. .+'''+. .+'''+. .+'''+. .+'' Kelemen PÃter / \ / \ Peter.Kelemen@xxxxxxx .+' `+...+' `+...+' `+...+' `+...+' - 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
