Xref: utzoo unix-pc.general:3663 comp.sys.att:7461
Path: utzoo!attcan!utgpu!jarvis.csri.toronto.edu!rutgers!dptg!mtunb!jcm
From: jcm@mtunb.ATT.COM (was-John McMillan)
Newsgroups: unix-pc.general,comp.sys.att
Subject: Re: Step rate on 2nd hard drive (UNIX-PC)?
Summary: Never forget the checksum...
Message-ID: <1646@mtunb.ATT.COM>
Date: 1 Sep 89 14:28:57 GMT
References: <1666@naucse.UUCP> <950@icus.islp.ny.us>
Reply-To: jcm@mtunb.UUCP (John McMillan)
Organization: AT&T ISL Middletown NJ USA
Lines: 15

In article <950@icus.islp.ny.us> lenny@icus.islp.ny.us (Lenny Tropiano) writes:
:
>You could write a program that opened up /dev/rfp010, read in struct vhbd
>and then change vhb.dsk.step = 14 and write it back out (basically what
>iv(1M) does...) 
:

For your own peace of disk, understand and maintain the required
check sums if you are going to re-write critical disk blocks.

As I recall...
	The VHB is checksum'd to -1;
	The bad block list is likewise checksum'd.

john mcmillan	-- att!mtunb!jcm