Datasheet

Using the Flash Disk

OL-6452-04

Working with a Flash Disk

Directory of disk0:/

No files in directory.

48755200 bytes total (48742912 bytes free)

System#

Enabling Booting from a Flash Disk

This section explains how to enable booting from a Flash Disk.

To enable booting from a Flash Disk, set configuration register bits 3, 2, 1, and 0 to a value between 2

and 15 in conjunction with the boot system [disk0: | disk1:]filename configuration command. This

section includes only descriptions of boot commands specific to the Flash Disk. (You can use either the

slotn: argument or the diskn: argument for boot commands.)

Following are definitions of the various Flash Disk-related boot commands:

• boot system flash disk0: or boot system slot0:—Boots the first file in the Flash Disk in slot 0.

• boot system flash disk1: or boot system slot1:—Boots the first file in the Flash Disk in slot 1.

• boot system flash disk0:herfile or boot system slot0:herfile—Boots the file named herfile from the

Flash Disk in slot 0.

• boot system flash disk1:hisfile or boot system slot1:hisfile—Boots the file named hisfile from the

Flash Disk in slot 1.

Note As you enter boot commands, pay attention to how you use the Spacebar, which influences the way your

system interprets the commands. Also, ensure that you define the entire path to a file as you enter the

boot commands; otherwise, the system might not be able to find the file.

For example, notice the difference in the following correct and incorrect commands:

System(config)# boot flash system disk0:myfile

Based on the preceding correct command, the system boots the file specified (myfile).

System(config)# boot flash system disk0: myfile

Based on the preceding incorrect command, the system finds the filename field blank because there is a

space after disk0:. In this case, the system ignores the filename argument and boots the first file on the

Flash Disk, which might not be the file called myfile.

Use the following procedure to enable booting the file myfile from a Flash Disk:

Step 1 Enter configuration mode and specify an image filename in the PC Card slot from which to boot by using

the configure terminal command, as follows:

System# configure terminal

Enter configuration commands, one per line. End with CTRL-Z.

System(config)# boot system flash disk0:myfile

Step 2 Enable the boot system flash disk0:myfile command using the config-register command with the

hexadecimal value shown in the following example:

System(config)# config-reg 0x2102