Date: Tue, 16 Apr 2002 00:07:50 -0600 (MDT) From: "M. Warner Losh" <imp@village.org> To: scsi@freebsd.org Subject: How to get 160MB/s LVD drives to use 160MB/s Message-ID: <20020416.000750.89789192.imp@village.org>
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I'm runing 4.5-release. From my dmesg: ahc0: <Adaptec 19160B Ultra160 SCSI adapter> port 0x9000-0x90ff mem 0xdf800000-0 xdf800fff irq 11 at device 12.0 on pci0 aic7892: Ultra160 Wide Channel A, SCSI Id=7, 32/255 SCBs da0 at ahc0 bus 0 target 0 lun 0 da0: <IBM DGHS18Y CLAR18( 3C3C> Fixed Direct Access SCSI-3 device da0: 40.000MB/s transfers (20.000MHz, offset 15, 16bit), Tagged Queueing Enabled da0: 17501MB (35843670 512 byte sectors: 255H 63S/T 2231C) da1 at ahc0 bus 0 target 1 lun 0 da1: <FUJITSU MAF3364L SUN36G 1213> Fixed Direct Access SCSI-2 device da1: 40.000MB/s transfers (20.000MHz, offset 63, 16bit), Tagged Queueing Enabled da1: 34732MB (71132959 512 byte sectors: 255H 63S/T 4427C) Notice that I'm only getting 40MB/s transfers. The BIOS detects them at 40MB/s, even though I have the max transfer set to 160. It does this with one or two drives on the bus. They are SCA drives in adapters (any chance it is a jumper on the adapter?). How do I get 160MB/s on these drives? As near as I can tell from the spec sheets, they both should support 160MB/s. Warner To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-scsi" in the body of the message
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