Date: Sat, 12 Jul 1997 21:03:29 -0700 From: "Jin Guojun[ITG]" <jin@george.lbl.gov> To: tom@sdf.com Cc: asami@cs.berkeley.edu, crb@Glue.umd.edu, freebsd-scsi@FreeBSD.ORG, gary@tbe.net Subject: Re: NCR SCSI controllers Message-ID: <199707130403.VAA24519@george.lbl.gov>
next in thread | raw e-mail | index | archive | help
}> Does some one have tested any ultra-wide SCSI controllers to have at least }> more than 20 MB throughput over a single controller with number of ultra-wide }> disks? I posted such question a few month ago, and did not hear any respond. }> I was wondering no one had it worked at that time. } } Not a problem. I used 11 disks on a 3940UW, and was able to max out }both channels. With drives being able to sustain 7MB writing, this is }getting easier to do. When you say to sustain 7MB writing, do you mean using a single disk? I guess. Because I can get 15MB writing over three disks via single NCR SCSI channel (just wide, not ultra-wide). So, 3940UW supposes to have 30MB in writing and 35MB in reading. This will be seen in NCR-875 when the driver is ready (S.E). Otherwise, the 7MB writing rate sounds not right. -Jin
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?199707130403.VAA24519>