https://community.cisco.com/t5/network-security/unable-to-erase-disk0-on-asa-from-rommon/m-p/4800658#M1098962 <P>Hi,</P><P>I am unable to <STRONG>erase disk0:</STRONG> from ROMMON mode on ASA 5525-X firewall. The operation starts but ends with errors <STRONG>nb_biosdisk err 3</STRONG>. Does it mean that the internal flash memory is corrupted, could not be repaired and must be replaced?</P><P>Thanks a lot.</P><P>ASA 5525-X, ROMMON Version2.1(9)8</P><P><span class="lia-inline-image-display-wrapper lia-image-align-center" image-alt="erase_disk_error.png" style="width: 999px;"><img src="https://community.cisco.com/t5/image/serverpage/image-id/180010i06EE2A8609351293/image-size/large?v=v2&amp;px=999" role="button" title="erase_disk_error.png" alt="erase_disk_error.png" /></span></P><P>&nbsp;</P> Fri, 24 Mar 2023 08:32:43 GMT Milan Benes 2023-03-24T08:32:43Z https://community.cisco.com/t5/network-security/unable-to-erase-disk0-on-asa-from-rommon/m-p/4800658#M1098962 <P>Hi,</P><P>I am unable to <STRONG>erase disk0:</STRONG> from ROMMON mode on ASA 5525-X firewall. The operation starts but ends with errors <STRONG>nb_biosdisk err 3</STRONG>. Does it mean that the internal flash memory is corrupted, could not be repaired and must be replaced?</P><P>Thanks a lot.</P><P>ASA 5525-X, ROMMON Version2.1(9)8</P><P><span class="lia-inline-image-display-wrapper lia-image-align-center" image-alt="erase_disk_error.png" style="width: 999px;"><img src="https://community.cisco.com/t5/image/serverpage/image-id/180010i06EE2A8609351293/image-size/large?v=v2&amp;px=999" role="button" title="erase_disk_error.png" alt="erase_disk_error.png" /></span></P><P>&nbsp;</P> Fri, 24 Mar 2023 08:32:43 GMT https://community.cisco.com/t5/network-security/unable-to-erase-disk0-on-asa-from-rommon/m-p/4800658#M1098962 Milan Benes 2023-03-24T08:32:43Z https://community.cisco.com/t5/network-security/unable-to-erase-disk0-on-asa-from-rommon/m-p/4817828#M1099662 <P>Indeed, there is an issue with the internal flash memory.<BR />Attempt 'erase all' from the rommon mode. Also, try to reboot the device, to validate if the flash gets recovered.</P> Wed, 19 Apr 2023 15:47:44 GMT https://community.cisco.com/t5/network-security/unable-to-erase-disk0-on-asa-from-rommon/m-p/4817828#M1099662 manabans 2023-04-19T15:47:44Z