Date: Sun, 27 Feb 2000 10:29:42 +1030 From: Greg Lehey <grog@lemis.com> To: Alfred Perlstein <bright@wintelcom.net> Cc: Johan Pettersson <johpe159@student.liu.se>, "freebsd-questions@FreeBSD.ORG" <freebsd-questions@FreeBSD.ORG> Subject: Re: 2 hd,same sort/size Message-ID: <20000227102942.B39462@freebie.lemis.com> In-Reply-To: <20000226040104.X21720@fw.wintelcom.net> References: <38B7AFDC.5B8A04FC@student.liu.se> <20000226040104.X21720@fw.wintelcom.net>
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On Saturday, 26 February 2000 at 4:01:05 -0800, Alfred Perlstein wrote: > * Johan Pettersson <johpe159@student.liu.se> [000226 03:19] wrote: >> Hello! >> >> I have installed 2 hd of same sort and size. >> And it seems like only one of them will be >> given dma/irq! I can't find anything about that >> problem. Grateful for help! > > The individual drives don't need seperate irq/ports, just the > controllers: > >> >> ------8<---------------------------- >> wdc0 at 0x1f0-0x1f7 irq 14 on isa > > controller #1 --^^^ > >> wdc0: unit 0 (wd0): <SAMSUNG WNR-31601A (1600MB)> >> wd0: 1536MB (3145968 sectors), 3121 cyls, 16 heads, 63 S/T, 512 B/S >> wdc0: unit 1 (wd1): <WDC AC36400L> >> wd1: 6149MB (12594960 sectors), 13328 cyls, 15 heads, 63 S/T, 512 B/S >> wdc1 at 0x170-0x177 irq 15 on isa > > controller #2 --^^^ > >> wdc1: unit 0 (wd2): <WDC AC36400L> >> wd2: 6149MB (12594960 sectors), 13328 cyls, 15 heads, 63 S/T, 512 B/S >> wt0 not found at 0x300 >> ------8<---------------------------- More to the point, I don't see any DMA at all. You need to set the controller flags to oxa0ffa0ff to set multi-sector transfers and DMA. Then your probes should indicate that you are using DMA, which will greatly improve performance. Greg -- Finger grog@lemis.com for PGP public key See complete headers for address and phone numbers To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
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