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- Newsgroups: comp.sys.ibm.pc.hardware
- Path: sparky!uunet!cs.utexas.edu!hermes.chpc.utexas.edu!news.utdallas.edu!goyal
- From: goyal@utdallas.edu (MOHIT K GOYAL)
- Subject: Re: SCSI Transfer Rates ??
- Message-ID: <C183C2.KKy@utdallas.edu>
- Keywords: SCSI
- Sender: usenet@utdallas.edu
- Nntp-Posting-Host: csclass.utdallas.edu
- Organization: Univ. of Texas at Dallas
- References: <1jdb71INN989@mudos.ann-arbor.mi.us> <1993Jan19.211953.26368@mksol.dseg.ti.com> <C16GHF.34r@unix.portal.com>
- Date: Thu, 21 Jan 1993 21:21:37 GMT
- Lines: 18
-
- >>Didn't he say it was a VL card? That means that the CPU can't do
- >>anything anyway, since when the disk controller has the local bus the
- >>CPU can't talk to memory or anything anyway. This is why I don't see
- >>VL as a real win for anything except perhaps video; it will give you
- >>great burst mode numbers, but it impacts overall system performance to
- >>do that.
- >
- >That doesn't make any sense. The only way to minimize the hit the CPU
- >takes when doing DMA is to make the DMA go as fast as possible, which is
- >what VLBus does. There's no free lunch. :)
- >
- I'm no expert.(or even novice!) but is it possible for the CPU to do other
- work while the hd controller does DMA on an EISA machine? If so, this is
- what the original poster might have been comparing VL-Bus too.
-
- Thanks.
-
-
-