Path: utzoo!mnetor!uunet!husc6!bbn!uwmcsd1!ig!agate!ucbvax!hplabs!hpcea!hpcilzb!tedj
From: tedj@hpcilzb.HP.COM (Ted Johnson)
Newsgroups: comp.sys.mac
Subject: Re: HD Horrors
Message-ID: <870139@hpcilzb.HP.COM>
Date: 10 Feb 88 17:54:49 GMT
References: <1988@mit-amt.MEDIA.MIT.EDU>
Organization: HP Design Tech Center - Santa Clara, CA
Lines: 35


>consternation there was only 19,100k available on the newly
>re-formatted, empty disk!  That's almost a megabyte lost!  Where is
>it?  Could it be that 5% of my disk is bad blocks?  Does anyone know
>how to verify this?  The disk is only 4 months old.

My SE HD20 only has 19,019k available (18.57 Meg).  

I think that part of the missing disk space is due to 
bad blocks, and part of it is be due to information that
is stored onto the disk, but not in a file (e.g., the info. that gets
returned when you do a PBHGetVInfo() call:  name of disk, number of
allocation blocks, size of allocation blocks, etc.).  Since this information
takes up space, maybe it is subtracted before the amount of space available
is reported.  But 1.5Meg is A LOT of space just for directory information....

It could also be the case that what Apple calls a 20 Meg hard disk really
only holds 18.5 Meg....

You could also have a bad disk.

Sad story ON (sob, sniff):

	June 1, '87  Bought a SE HD20
	June 4, '87  Bad hard disk.  Got a new SE HD20.
	August  '87  Bad hard disk.  Replaced it. 
		     Fan ate itself.  Replaced whole analog board.
	Dec. '87     Hard disk started making HORRIBLE SCRAPING NOISES
 		     upon boot up.
Sad story OFF.

I think the next time the internal hard disk goes belly up, I'll
just rip it out and install a Jasmine internal disk.

-Ted