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x86: Installing Solaris Software
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Preserving MS-DOS and Installing the Solaris Operating Environment

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Many x86 systems are preconfigured with the MS-DOS operating system. It's common on these preconfigured systems to have MS-DOS consume the entire disk. It's also common to have data on the MS-DOS partition that you don't want to lose when you install Solaris software. (When you install Solaris software, it writes over any existing data on the disk.) However, you can back up any data on the MS-DOS partition and then restore it after you have installed the Solaris software. This section describes this procedure.
Note - Although this procedure describes how to save and restore data on an MS-DOS partition, you can use the same general procedure to back up data on any existing operating system before installing Solaris software.

1 Back up the existing MS-DOS data.

Use the MS-DOS backup program. See the MS-DOS documentation for detailed information.

2 Install Solaris software and manually create a Solaris and an MS-DOS fdisk partition.

You can use either an interactive installation or a custom JumpStart installation.
If You Are Doing ...Then ...
An interactive installationSee Chapter 7, "Booting and Installing Solaris: Interactive."

During the interactive installation, you are prompted to select the disk(s) you want to install Solaris software on. After selecting disks, you can create both the Solaris fdisk partition and the MS-DOS fdisk partition.

Also, if you want to reserve space on the disk(s) for other operating systems, create those fdisk partitions at this time in the Solaris installations.

After completing the Solaris software installation, continue with Step 3 on page 183.
A custom JumpStart installationSee Chapter 8, "Booting and Installing Solaris: Custom JumpStart."

Note: Be sure that the installation profiles specifies a Solaris fdisk partition and an MS-DOS fdisk partition.

After completing the Solaris software installation, continue with Step 3 on page 183.
Note - The Solaris software program will not write to the MS-DOS partition, leaving space there for you to install the MS-DOS operating system and to restore data on it after Solaris is installed.

3 After Solaris software is installed, halt the system.

4 Boot the system and install MS-DOS from the MS-DOS setup and installation disks.

Note - The MS-DOS setup program will recognize that the MS-DOS partition is unformatted and prompt you for permission to format it. The setup message suggests that the setup program will format the entire disk (and overwrite the Solaris fdisk partition). However, the setup program only formats the MS-DOS fdisk partition and leaves the Solaris fdisk partition intact.

5 Restore any backed-up data to the MS-DOS partition.

Use the MS-DOS backup program to restore backed-up files. See the MS-DOS documentation for detailed information.

6 Set the active fdisk partition to the Solaris partition.

The active partition is the partition that the system automatically boots from. After installing MS-DOS and restoring backed-up files, the MS-DOS partition will be the active fdisk partition. Use the MS-DOS fdisk program to set the active fdisk partition to the Solaris partition.

7 Reboot the system.

The system will boot from the Solaris fdisk partition and start running the Solaris software.