Xref: utzoo unix-pc.general:3204 comp.sys.att:6868
Path: utzoo!attcan!uunet!portal!cup.portal.com!thad
From: thad@cup.portal.com (Thad P Floryan)
Newsgroups: unix-pc.general,comp.sys.att
Subject: Re: Hard Disk questions
Message-ID: <20061@cup.portal.com>
Date: 2 Jul 89 00:39:55 GMT
References: <9186@phoenix.Princeton.EDU> <19995@cup.portal.com> <701@argon.UUCP>
Organization: The Portal System (TM)
Lines: 14

Re: Ed Horch's question about my table showing HD capacities at both 17 and
16 sectors per track for the UNIXPC ...

Yes, that appears to be how the bad blocks are "spared out" on the UNIXPC.
The system (at least 3.51) uses 1K blocks and lays down 8 of those (16 sectors)
per track.

From one point of view, we're losing 1/17 the capacity of our HDs on the UNIXPC
because of this scheme (scam? :-)

I've never seen a (new) HD with more than, say, 20 factory-reported bad sectors
yet (assuming a mongo Maxtor with 312,120 sectors), a LOT are being "wasted."

Thad Floryan [ thad@cup.portal.com (OR)  ..!sun!portal!cup.portal.com!thad ]