usenet@cps3xx.UUCP (Usenet file owner) (09/12/89)
Does anyone know if device drivers written under SCO Xenix 386 2.3.x can be linked into an SCO UNIX 386 kernel and run? If they are not object compatible, have there been any changes at the source level that would prevent a recompile of the Xenix driver under Unix? While I have your ear, does anyone know if SCO UNIX has gotten rid of the silly limit of only seeing 1024 cylinders on a disk that SCO XENIX had? John H. Lawitzke UUCP: Work: ...uunet!frith!dale1!jhl Dale Computer Corp., R&D Home: ...uunet!frith!dale1!ipecac!jhl 2367 Science Parkway Internet: jhl@frith.egr.msu.edu Okemos, MI, 48864 [35.8.8.108]
ronald@ibmpcug.co.uk (Ronald Khoo) (09/14/89)
In article <4552@cps3xx.UUCP> jhl@frith.egr.msu.edu () writes: >While I have your ear, does anyone know if SCO UNIX has gotten rid of >the silly limit of only seeing 1024 cylinders on a disk that SCO XENIX >had? Eh? Xenix didn't have this problem at all, only the documentation did! Yes, I *know* that the release notes say only 1024 are supported, but there doesn't seem to be any problem going above that. At least, not if the *controller card* can handle it, but then all WD cards starting from WD1003 and more modern can. For standard ST-506 controllers, I can heartily recommend the WD1006. With 1:1 interleave, it screams along quite merrily. (hey, rosso@sco, why did the release notes say 1024 only ?) Under SCO Xenix 2.3.1 and later, you can even have 2 controllers, and this makes things go *really fast* I am using 2 WD1007A ESDI controllers, with one disc on each, and am getting terrific I/O performance from the machine. And yes, one of the discs has 1224 cylinders which I had no problem with even when I was using Xenix 2.2.3 last week. But there's no doubt that adding the second controller is definitely a worthwhile investment--for an application mix which is mostly disc bound, meaning anything not development or CAD oriented, really, it actually effectively doubles the number of users you can support! -- Ronald.Khoo@ibmpcug.CO.UK (The IBM PC User Group, PO Box 360, Harrow HA1 4LQ) Path: ...!ukc!slxsys!ibmpcug!ronald Phone: +44-1-863 1191 Fax: +44-1-863 6095 $Header: /users/ronald/.signature,v 1.1 89/09/03 23:36:16 ronald Exp $ :-)