Enabling Booting From A Compactflash Disk - Cisco 7401ASR Installation And Configuration Manual

Working with a CompactFlash Disk
Verify that the file fun1 is deleted:
Step 3
System# dir
Directory of disk0:/
No files in directory.
48755200 bytes total (48742912 bytes free)
System#

Enabling Booting from a CompactFlash Disk

This section explains how to enable booting from a CompactFlash Disk.
To enable booting from a CompactFlash Disk, set configuration register bits 3, 2, 1, and 0 to a value
between 2 and 15 in conjunction with the boot system [disk0: ]filename configuration command. This
section includes only descriptions of boot commands specific to the CompactFlash Disk. (You can use
either the slotn: argument or the diskn: argument for boot commands.)
Following are definitions of the various CompactFlash Disk-related boot commands:
•
•
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 system flash disk0:myfile
Based on the preceding correct command, the system boots the file specified (myfile).
System(config)# boot system flash 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
CompactFlash Disk, which might not be the file called myfile.
Use the following procedure to enable booting the file myfile from a CompactFlash Disk:
Enter configuration mode and specify an image filename in the CompactFlash Disk slot from which to
Step 1
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
Enable the boot system flash disk0:myfile command using the config-register command with the
Step 2
hexadecimal value shown in the following example:
System(config)# config-reg 0x2102
This command, with the hexadecimal value 0x2102, results in the following:
Cisco 7401ASR Installation and Configuration Guide
C-12
boot system flash disk0: or boot system slot0:—Boots the first file in the CompactFlash Disk in
slot 0.
boot system flash disk0:herfile or boot system slot0:herfile—Boots the file named herfile from the
CompactFlash Disk in slot 0.
Appendix C Using the CompactFlash Disk
OL-5419-01 B0