🚀 go-pugleaf

rbp@investor.pgh.pa.us (Bob Peirce #305) writes:

>I have an HSD scanner at the end of my SCSI chain.  Since I don't use it
>all the time and it gets pretty hot, I like to turn it off when I am not
>using it.  When I had Rel2.0 I did not seem to have a problem with this.
>Recently I installed 2.1 and now the system will go along for a couple
>of days and then suddenly fill up swap space.  It may be that this is a
>problem with 2.1 which is totally unrelated to the scanner but if I
>leave the scanner on swap doesn't seem to fill up.  Maybe I haven't
>waited long enough.  Anyhow I would appreciate any info on this.
I cannot see any correlation between turning off a SCSI device and
having your /private/vm/swapfile grow.

>Something I haven't tried is to actually disconnect the scanner from the
>CD drive and plug the SCSI terminator in.  That doesn't seem like a good
>thing to do on a running system but maybe it is okay.

Any of what you are doing isn't ok.  Never turn off any SCSI device
or remove it from the chain while the host machine is operating.
One of these days, you will find that your hard drive will go blank
and you won't be able to explain why.  Yes, this kind of thing can
happen by mucking with the SCSI chain while the host machine is
operating (esp. if it's writing to one of the disks!)
Theoretically, it is safe to remove stuff after the machine is
sync'd, halted  and in the Monitor (NeXT> prompt), but it's always better to
actually turn the machine off before you disconnect anything.

>-- 
>Bob Peirce, Pittsburgh, PA         rbp@investor.pgh.pa.us         412-471-5320
>venetia@investor.pgh.pa.us [NeXT Mail]  !uunet.uu.net!pitt!investor!rbp [UUCP]
-- 
David Lemson                                                 (217) 244-1205
University of Illinois NeXT Campus Consultant  / CCSO NeXT Lab System Admin
Internet : lemson@uiuc.edu                 UUCP :...!uiucuxc!uiucux1!lemson 
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