Path: utzoo!attcan!uunet!tut.cis.ohio-state.edu!ucbvax!ucsfcgl!cca.ucsf.edu!wet!logic From: logic@wet.UUCP (Henry Kwan) Newsgroups: comp.sys.atari.st Subject: Re: Hard Drive Speeds Message-ID: <411@wet.UUCP> Date: 13 Aug 89 10:12:37 GMT References: <1275@blackbird.afit.af.mil> <29194@pbhya.PacBell.COM> <399@wet.UUCP> <676@opal.tubopal.UUCP> Reply-To: logic@wet.UUCP (Henry Kwan) Organization: Wetware Diversions, San Francisco Lines: 26 In article <676@opal.tubopal.UUCP> alderaan@tubopal.UUCP (Thomas Cervera) writes: >In article <399@wet.UUCP> logic@wet.UUCP (Henry Kwan) writes: > >>[...] Compare a ST506/412's >>5Mbit/sec to something like an Imprimis 94181-702M's 15-24Mbit/sec (ain't >>sure on this one but it's somewhere in that neighborhood). The Imprimis >>will just blow your socks off. > > But doesn't the DMA bus limit such a speed if you solder it to an ST ? > True. Then again, I'm of the school of thinking that overkill is better than underkill. The Imprimis drive will get something like 1,050K/sec on ICD's RATEHD while the ST506/412 drive will get something like 300K/sec. Real-life benchmarks are probably less glaring in difference but should still be quite noticable. I'm curious about the BMS-200 host adapter though. They claim that it supports a 1.6MB/sec transfer rate but I always thought that the ST's DMA bus limit was 1.33MB/sec. Or are they measuring it at the SCSI level? -- Henry Kwan - FWB, Inc. | "Experience varies directly claris!wet!logic@ames.arc.nasa.gov | with equipment ruined." cca.ucsf.edu!wet!logic@cgl.ucsf.edu | {claris,ucsfcca,hoptoad,lamc}!wet!logic | -- Tech Support