Date: Fri, 11 Jun 2004 13:47:17 +0200 From: "Emil A Eklund" <eae@eae.net> To: "Karsten Fuhrmann" <karsten_fuhrmann@cartoon-film.de>, <freebsd-questions@freebsd.org> Subject: Re: SCSI too slow Message-ID: <050601c44fa9$d94101c0$0100a8c0@internal.basset.se> References: <40C998EF.4090607@cartoon-film.de>
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The 29160UW adapter has two internal lvd connectors, only one of those supports Ultra-160, the other one is provided for older equipment, since a SCSI chain will only operate as fast as the slowest device on it. Therefor make sure that the devices that supports Ultra-160 (or Ultra 2 Wide if thats what you have) is on the Ultra-160 connector, while the slower devices is on the other. If my memory is not failing me the Ultra-160 connector is the one to the left. Also, check your SCSI Bios, it has some speed related settings. /Emil A Eklund (eae@eae.net) ----- Original Message ----- From: "Karsten Fuhrmann" <karsten_fuhrmann@cartoon-film.de> To: <freebsd-questions@freebsd.org> Sent: Friday, June 11, 2004 13:35 Subject: SCSI too slow > Hello, > i am using a Adaptec 29160UW Controller in my FreeBSD 4.8 Box together > with an Easyraid 2 external RAID System and a Quantum SDLT-320 Drive. > The problem is the data transfer Rate of my SCSI Channel is only 40 > Mbytes/s. > > dmesg shows > da0: <easyRAID II > Fixed Direct Access SCSI-2 device > Jun 8 16:17:17 stern /kernel: da0: 40.000MB/s transfers (20.000MHz, > offset 31, 16bit), Tagged Queueing Enabled > > Is there a way to change the transfer rate somehow, because at least my > SDLT is an ultra wide SCSI (LVD/SE) > > Cheers, > karsten > > > _______________________________________________ > freebsd-questions@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-questions > To unsubscribe, send any mail to "freebsd-questions-unsubscribe@freebsd.org" >
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