# Using the ServeRAID Manager in startable-CD mode

The ServeRAID Manager program operates in two ways:

- Startable-CD mode
- As an installed software program.

When you run the ServeRAID Manager program from the startable IBM ServeRAID Support CD, you are using startable-CD mode. Startable-CD mode enables you to configure your ServeRAID controller before you install your operating system. After you have configured the ServeRAID controller and installed the operating system, you also can use startable-CD mode to fine-tune specific ServeRAID controller settings.

To run the ServeRAID Manager program in startable-CD mode, turn on the server; then, insert the IBM ServeRAID Support CD (or the CD that contains the ServeRAID Manager program that came with your server) into the CD-ROM drive.

If the ServeRAID Manager program detects unconfigured ServeRAID controllers and ready drives, the program automatically starts the Configuration wizard.

These are the actions that are available in startable-CD mode only:

- Changing the rebuild rate
- Changing the stripe-unit size
- Changing BIOS-compatibility mapping
- Changing the SCSI-transfer speed
- Enabling and disabling read-ahead cache mode
- Enabling and disabling unattended mode
- Changing the write-cache mode on a physical drive
- Changing the write-cache mode on a logical drive
- Configuring for clustering

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