SCO OpenServer

Updating a Previously Installed Driver

To install the Mylex Disk Array Controller into an existing system to replace an older version of the driver, perform the following procedure:

1.Make sure you are in single-user mode (init 1), then install the Mylex mdac drivers by running the installpkg utility. Insert the “Software Kit SCO OpenServer Driver diskette.”

#init 1

#installpkg

2.When the message prompt asks for a package name, type mdac.

Please enter the names of the packages you wish to install, or q to quit: mdac

3.A message prompt will advise you that a mdac is already installed and will ask you to confirm that you want to replace it. Type y for yes.

There is already a mdac installed.

Do you want to replace it with the version in madac? (y/n/q): y

4.Rebuild SCO UNIX kernel.

#cd /etc/conf/cf.d

#./link_unix

5.Reboot the system to invoke the new kernel.

Tuning SCO for Maximum Performance

Best system performance can be achieved when using the Mylex Disk Array Controller SCO UNIX mdac driver by fine-tuning certain UNIX parameters.

To perform this system tune-up, use the scoadmin utility. Select Hardware/ Kernel manager. Under the Kernel option select Tune Parameters. The SDSKOUT parameter is located under Miscellaneous device drives and hardware parameters and the NMPBUF parameters is located under Buffers management. Refer to the SCO UNIX on-line documentation for information on the scoadmin utility.

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Manual No. 775079

5-11