Path: utzoo!attcan!utgpu!watserv1!watmath!uunet!cs.utexas.edu!uwm.edu!lll-winken!bu-cs!att!dptg!mtunb!jcm
From: jcm@mtunb.ATT.COM (John McMillan)
Newsgroups: unix-pc.general
Subject: Re: Optical disk for a unix-pc, is it possible?
Message-ID: <1722@mtunb.ATT.COM>
Date: 11 Dec 89 15:01:47 GMT
References: <614@mbph.UUCP> <1037@icus.islp.ny.us> <1226@becker.UUCP> <617@uncle.UUCP> <1286@becker.UUCP>
Reply-To: jcm@mtunb.UUCP (John McMillan)
Distribution: unix-pc
Organization: AT&T ISL Middletown NJ USA
Lines: 20

In article <1286@becker.UUCP> bdb@becker.UUCP (Bruce Becker) writes:
>In article <617@uncle.UUCP> jbm@uncle.UUCP (John B. Milton) writes:
:
>|The actual limit with the WD2010 is (from /usr/include/gdisk.h):
>|gdisk.h:#define HDMAXCYL	1400	/* support a maximum of 1400 cylinders */
>|This is a compiled into the kernel value, we can't change it.
>
>	Those of you with kernel source (8^) can
>	grep for the use of this constant so as to
>	discover where to patch... please post...

	And even without kernel source:
	those of you clever enough to bother to GREP
	for HDMAXCYL in the /usr/include/sys directory
	may notice it is used in the declaration of array
	sizes.  [If you have a single disk, you MIGHT get
	away with double the size (ie., 2800) by trashing
	the 2nd disk area's Bad Block Q array].

john mcmillan