Unix (3.2v4.2) and ODT FAQ
This article is from a FAQ concerning SCO operating
systems. While some of the information may be applicable to any OS,
or any Unix or Linux OS, it may be specific to SCO Xenix, Open
There is lots of Linux, Mac OS X and general Unix info elsewhere on
this site: Search this site is the best
way to find anything.
This applies to at least 3.2v4.0 and later. As always, make and
verify a backup and a set of emergency diskettes before any major
See also How can I
install a new disk controller that requires a different driver?
Make sure that the appropriate driver is already installed. It
may already be there, or it may be in the form of a BTLD. Your
manual should provide the instructions for this step.
The file /etc/conf/cf.d/mscsi
contains a list of SCSI devices and the parameters (such as which
host adapter, what SCSI ID they are, etc.) required for them. The
safest change to make is to replace the name of the old adapter
driver (e.g. ad for an Adaptec 154x) to the name of the new one
(e.g. arad for an AIC-7770-based adapter) on each such line. There
is another option, which is to use auto. I am not sure
exactly how this works if there is more than one host adapter
installed, so on systems with multiple host adapters it is probably
wisest to list the specific host adapter rather than using
you will find files named after the drivers you're installing and
removing (e.g. ad and arad). You will need to edit each of them.
The second column should be set to Y for a driver which is enabled,
and N for a driver which is not. For some drivers, you will also
need to edit the adapter address in columns 7 and 8; many adapters
do not require this. There is no need to change
/etc/conf/cf.d/sdevice, as it is built from these files when
you relink the kernel.
There's at least one special case which deserves to be noted
here. If you are moving from an EISA host adapter to a PCI one, you
may need to enable PCI support in your kernel if this is the first
PCI device. In /etc/conf/sdevice.d/pci, you should see a
line which begins pci N. Change the N to Y. If you are
removing your last EISA device, you may wish to do the inverse in
/etc/conf/sdevice.d/eisarom with the eisarom
line, though it probably doesn't hurt to have this support in the
kernel even though you have no EISA devices. This also applies to
other hardware changes involving addition or deletion of PCI and
EISA devices, and it applies in reverse if you're removing your
last PCI device and adding your first EISA one.
Relink the kernel, shut down, and swap the hardware.
See also Transferring to new hardware with a Supertar
Got something to add? Send me email.
Increase ad revenue 50-250% with Ezoic