Re: Powered-down IBM drive hangs bus

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From: Ralph Shnelvar
Date: Thu, 23 Nov 1995 13:52

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My guess is that your drive is supplying termination -power- (not just
termination resistance) and by powering down the device you are
causing a power fluctuation.

pschneid@es.unizh.ch (Peter Schneider) wrote:

>
>Unfortunately, I have no solution or explanation - I can only report that 
>the exact same problem also crops up with a Toshiba 5301B CD-ROM drive: 
>when it is powered down, it hangs the bus. There is nothing I could do 
>about it; neither the state of internal/external termination nor the 
>cabling did anything about it. It seems that some SCSI drives do funny 
>things to the bus when they are powered down, ie they do not act 
>electrically passive in that state. Still looking for explanations.
>
>Peter


Ralph Shnelvar      "We make tape drives work like disk drives"
President           http://www.ecnet.com/tpd/index.html
TAPEDISK Corporation

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From: ralphs@tesser.com (Ralph Shnelvar)
Newsgroups: comp.sys.mac.hardware.storage,comp.sys.mac.system,comp.periphs.scsi
Subject: Re: Powered-down IBM drive hangs bus
Date: Thu, 23 Nov 1995 13:52:13 GMT
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