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From: ruck@sphere.UUCP (John R Ruckstuhl Jr)
Newsgroups: unix-pc.general,comp.sys.att
Subject: 3b1, antistatic tab removal
Message-ID: <303@sphere.UUCP>
Date: 14 Jun 90 18:42:46 GMT
Followup-To: unix-pc.general
Organization: Private; Colorado Springs, CO
Lines: 34

I have opened my 3b1 a few times during the past ~18 months to clean the
hard disk's antistatic tab (to stop hard disk whine).  At the time this
operation was discussed (~18 months ago?), some posters commented that
the tab was unnecessary, and that it could simply be removed without
harm.  
Has anyone removed their disk's antistatic tab?  Any side-effects?

[BTW, thanks to you who originally explained this fix... I had already 
had the original drive *replaced* (under warrenty) because of this 
whine, then the replacement drive began whining, and I was getting very
agitated.]


Also:
My 3b1 ingests much dust.  How do you/I remove the accumulated dust from
the opened 3b1?  (I considered wiping the motherboard with an old 
paintbrush, but worried about static (dis)charge.)


How would I checksum a diskette so that I could verify the integrity of
copies?  How about:
    $ dd if=/dev/rfp021 | sum
and perhaps better,
    $ dd if=/dev/rfp021 ibs=4k obs=4k | sum -r
Does anyone checksum backups?  Or is checksum inherent in cpio, so if
one can cpio -iBct (or cpio -iBc ?), then the backup is clean?


Thank you for any information.
Regards,
John.
-- 
John R Ruckstuhl, Jr	UUCP: sphere!ruck
			DOMAIN: ruck%sphere@hp-lsd.cos.hp.com