Reference Guide
44 | File Management
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Caution: This command deletes all files, including the startup configuration file. After executing this 
command, consider saving the running config as the startup config (use the 
write memory command or 
copy run start).
Related
Commands
format flash (Z9000) 
z
Erase all existing files and reformat the file system in the internal flash memory or 
the USB drive. Once the file system is formatted, files cannot be restored. 
Syntax
format [flash: | slot0: | usbflash: ] 
Parameters
Default
flash memory 
Command Modes
EXEC Privilege 
Command
History
Usage
Information
You must include the colon (:) when entering this command. 
Caution: 
This command deletes all files, including the startup configuration file. So, after executing 
this command, consider saving the running config as the startup config (use the write memory 
command or copy run start). 
fsck flash (S-Series)
Checks the flash file system for errors.
Syntax
fsck flash:
fsck usbflash:
Default
none
Command Modes
EXEC Privilege
Command
History
copy Copy the current configuration to either the startup-configuration file or the 
terminal.
show file Display contents of a text file in the local filesystem. 
show file-systems Display information about the file systems on the system. 
flash: | slot0: | 
usbflash:
flash: Reformat the file system in the internal flash memory.
slot0: Reformat the file system in the external flash memory, i.e., SSD. 
usbflash: Reformat the file system in the usbflash. 
Version 8.3.11.1 Introduced on the Z9000 
Version 8.3.19.0 Introduced on the S4820T










