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From: macq@miguel.llnl.gov (Don MacQueen)
Newsgroups: comp.sys.mac.hardware
Subject: Serial safety; HD inteleave
Message-ID: <1990Sep20.123824@miguel.llnl.gov>
Date: 20 Sep 90 19:38:24 GMT
Sender: usenet@lll-winken.LLNL.GOV
Reply-To: macq@miguel.llnl.gov (Don MacQueen)
Organization: Lawrence Livermore National Laboratory
Lines: 17


1)  Many articles have warned against plugging in/unpluggin ADB cables
while the Mac is on.  What about the modem cable?  I sometimes want to
unplug my modem cable from its line to a local mainframe and plug it
back in to the serial port of a PC (with null modem) for file transfer. 
Is there a danger of hardware damage?

2)  Many articles discuss interleave re hard disk read/write speed (eg
MacPlus 3:1, SE 2:1, others 1:1).  None that I've read say
when/where/what establishes the interleave.  Is it done at disk format
time (with disks sold preformatted I've never needed to format a disk)? 
by the device driver software?  In short, how do I find out if I have
the right interleave, and if not, change it?

Thanks in advance.
Don MacQueen
macq@miguel.llnl.gov