Hi Shinichi,

Can you please share the commands you have run for upgrading the CSS software.

Kindly tell how many versions are already installed on you CSS.

To

a. List the  ADIs on the CSS.

(config)# show installed-software

sg0720104

sg0730003

b. Access  boot mode:

(config)# boot

(config-boot)#

c. Use the remove command to remove the ADI.

(config-boot)# remove sg0720104

If you are having two software version installed.

Kindly send me the output of the 

(config)# show installed-software

Before you can upgrade your CSS, make sure you have enough space on the box to 
complete the upgrade.

Because a hard-disk-based CSS can contain a maximum of four ArrowPoint Distribution 
Images (ADIs). A Flash disk-based CSS (CSS 11150 or CSS 11800) can contain a 
maximum of two ADIs. If the limit has been reached, you must remove one ADI 
version before you can add a new version.

==================================== 

Before you can upgrade your CSS, you must copy the new CSS software to your FTP  server and configure an FTP server record so the CSS recognizes the server. Use  the show installed-software version-limit command to display  the maximum number of installed versions allowed on your hard disk or Flash  disk.

When upgrading the CSS software, you can use the upgrade  script or manually enter CLI commands. The upgrade script allows you to upgrade  the CSS either automatically or interactively by responding to script prompts.

Either way, the tasks that the script performs include:

•Checking  to see how many installed software versions are installed on the CSS, and if the  CSS contains the maximum number of installed software versions, then deleting an  older software version.

•Archiving  the running configuration to the startup configuration.

•Copying  the new ADI to the CSS boot-image directory.

•Unpacking  the new ADI.

•Copying  the scripts and user profiles from the older CSS software to the new software.  The copied scripts do not include Cisco-supplied scripts except default-profile.

•Setting  the primary boot file to the new ADI.

•Rebooting  the CSS.

We recommend that you use the upgrade script because the  upgrade script ensures that the existing scripts and user profiles are copied to  the new software.

When manually upgrading the CSS software, you must enter CLI  commands to perform the same tasks that the upgrade script would perform.

You can run the upgrade script to perform the software  upgrade without having to enter any information. The script automatically:

•Checks to  see how many installed software versions are installed on the CSS. If the CSS contains the  maximum number of installed software versions, the script deletes an older  version.

Note The script  does not prompt you to delete a version of software that you configured as the  primary or secondary boot file. On a disk-based system, you may need to quit and  then deselect the primary or secondary boot file before continuing with the  upgrade.

•Archives  the running configuration to the startup configuration.

•Copies the  new ADI to the CSS boot-image directory.

•Unpacks  the new ADI.

•Copies the  scripts and user profiles from the older CSS software to the new software. The  copied scripts do not include Cisco-supplied scripts except default-profile.

•Sets the  primary boot file to the new ADI.

•Reboots  the CSS.

Kindly Use the following URL for your reading if you have not gone through this:

http://ciscosystems.com/en/US/docs/app_ntwk_services/data_center_app_services/css11500series/v8.20/configuration/administration/guide/Upgrade.html

Please revert back with the answers of my question and I believe we will be able to resolve your problem.

Best regards,

Sachin