Date: Mon, 24 Sep 2001 23:24:37 +0200 From: "Peter Blok" <pblok@inter.NL.net> To: <freebsd-scsi@freebsd.org> Subject: Strange SCSI speed Message-ID: <000301c1453f$5113c1b0$8a02a8c0@ntpc>
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Hi, I have a very strange problem. I have a MSI 6120 Dual CPU board with an on-board 7895 dual SCSI controller. I have two identical IBM drives and connected them to the first UW channel. da0 target 0 lun 0 displays it is capable of doing 40MB/s. da1 target 1 lun 0 is only able to do 11.626 MB/s. I've checked the termination. The last drive on the cable is terminated, the other isn't. The on-board scsi is configured to automatic. Switching it to manual and enable termination doesn't help either. Changed the SCSI cable. Didn't help. Changed the order on the SCSI bus and the corresponding termination. Doesn't help. Checked the throughput; da1 was indeed slower than da0. Checked the BIOS setting - identical. Swapped da1 with another drive. This worked fine. The scsi-id was accidentally jumpered to 2, but i like it to be contiguous so i changed to target 1. 11.626MB/s again!!!! That doesn't make any sense. Original drive back in on target 2. This works too!!! Back to target 1 and again 11.626MB/s. I have tried target 3, which works as well. How come target 1 is reporting the wrong speed. My SCSI bios is rev. 2.11 I have a work-around, but how is this possible? Peter To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-scsi" in the body of the message
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