Cisco Cisco ASA 5510 Adaptive Security Appliance Guida Alla Risoluzione Dei Problemi

If you can view a number of these recovery files on the flash, these may result because of an automated
testing process where the ASA might be power cycled too often. In general, these files do not contain any
vital data and can be safely deleted with the 

delete

 command. Example is shown:

Note: The FSCK utility runs automatically at startup, so you can see these recovery files even if you did not
manually enter the fsck command.

There are certain instances where these recovery files can be seen on the flash of a freshly ordered Cisco ASA
appliances. A snippet of 

show flash:

 is shown:

96     −rwx 32768       00:00:00 Jan 01 1980 FSCK0000.REC

97     −rwx 32768       00:00:00 Jan 01 1980 FSCK0001.REC

99     −rwx 32768       00:00:00 Jan 01 1980 FSCK0002.REC

100    −rwx 32768       00:00:00 Jan 01 1980 FSCK0003.REC

This is due to a manufacturing testing and this behavior is filed in Cisco bug ID CSCtf63643 (registered
customers only) . These FSCK files dated as 1980 due to when they are created with file description
initialized to ZERO by the FSCK utility. These files can be deleted and after a device reboot, these files do not
appear again. If these files appear again, you are advised to run a format operation.

If the flash filesystem stays unresponsive even after trying the fsck utility, you can format the flash to erase all
the existing files and images. Flash system can be formatted with the format flash: command.

Note: Check on these actions before you perform the format utility:

Copy the running configuration to the tftp−server with the copy run tftp command OR

Copy the start−up configuration to the tftp−server with the copy start tftp command.

1. 

Take a backup from the output of the show version command; as you need to use the activation key.

2. 

There is another similar command that performs the same job as 

format

 do. It is shown here:

CiscoASA# erase flash:

This command overwrites all files and erases the file system, which includes hidden system files, and then
reinstalls the file system. On Cisco ASA 5500 series security appliances, the erase command destroys all user
data on the disk with the 0xFF pattern. In contrast, the format command only resets the file system control
structures. When the 

erase

 option is used, it deletes all the information related to the licensing. You need to

fetch the activation keys in order to retain the licenses on Cisco ASA. Refer to Cisco Licensing Web Page
(registered customers only) for more information and in order to request the activation key.

Note: You need to have valid Cisco user credentials in order to access this web page.

If none of the previous steps works, then you can try to remove the erroneous flash card manually and replace
it with another working flash card. Refer to these documents for a detailed step−by−step procedure in order to
perform this task:

Removing and Installing the System CompactFlash

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