Date: Fri, 2 Jun 1995 22:40:40 -0400 From: Temptation <temp@temptation.interlog.com> To: "Rodney W. Grimes" <rgrimes@gndrsh.aac.dev.com> Cc: Fred Cawthorne <fcawth@squid.umd.edu>, FreeBSD hackers <FreeBSD-hackers@FreeBSD.Org> Subject: Re: Can't boot a new 2.0.5A system Message-ID: <Pine.3.89.9506022226.B16593-0100000@temptation.interlog.com> In-Reply-To: <199506030152.SAA08914@gndrsh.aac.dev.com>
next in thread | previous in thread | raw e-mail | index | archive | help
On Fri, 2 Jun 1995, Rodney W. Grimes wrote: > > > > > > > > > > > > > > > Geometry correct? > > > > > > > > > > Hmmmm... I thought one of the reasons why I bought a SCSI drive > > > > > was to avoid worrying about stuff like geometry and cylinder > > > > > translations and what not. At least I never had to worry about it on > > > > > any other computer with a SCSI disk until now. The older installers > > > > > guessed it correctly, so I didn't touch the settings on this one. > > > > > > > > > > > When in doubt freebsd looks to see what DOS did, so it you have a DOS > > > partition, it'll use those geometry figures.. > > > > > > by definition then at least the BIOS and FreeBSD will match.. > > > > > The new install got the wrong geometry even when I had FreeBSD 2.0 on > > the entire disk... Perhaps there was a problem with the stuff that > > an old fdisk created??? I don't remember if I ever installed with an NCR > > controller before. (I used to have an Adaptec 1542CF on here...) > > So, maybe my NCR scsi bios is messing things up??? > > Are you guys sure that the user setting of the geometry thing (i.e. G in > > the fdisk screen) is working properly?? > > BIG CAUTION. The NCR controller does not always use the 32 sector 64 head > translation that the adaptec does. I have found that the NCR is using > 34 head 62 sector geometries on the 1 G drives I am using and not sure on > the 535MB since I have not installed DOS on one of them to see. > > Be very carefull when trying to move from one controller to another, > translation schemes vary between manufactures! it's not just Manufactures, I can't move a hard drive from 1542CF -> 1742 -> 2742t/2940/2842 (adaptec) 1gig to 4gig, Maxtor/Seagate/Quatum/Fuj/Toshiba and thats with all the cards being set up the same.
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?Pine.3.89.9506022226.B16593-0100000>