File System

A file system consists storage devices and the files stored on the storage devices. You can manage the storage devices and the files stored on the storage devices.

Table 1 lists the storage devices supported by the FW.

**Table 1** Supported storage devices
Storage Device	Root Directory	Description
CF card/NAND Flash	hda1:/or hda2:/	Storage device in standard configuration. It is used to store system software and configuration files. Table 2 shows the system directories in the device. To display the directories, run the dir /all command. NOTE: Information in system directories is important. Therefore, do not change or delete these directories.
Hard disk	Unavailable for administrators	Optional storage device. It is used to store logs and reports. You are advised to install hard disks for the FW to store more logs and reports. Supported by all models except the USG6510E/6510E-POE/6530E.
SD card	Unavailable for administrators	Optional storage device. It is used to store logs and reports. You are advised to install SD Cards for the FW to store more logs and reports. Only the USG6510E/6510E-POE/6530E support SD cards.
USB disk	usb0:/ or usb1:/	Optional storage device. It is used to store system software and configuration files and applies to system software and configuration upgrade scenarios. The USG6510E/6510E-POE/6530E have only 1 USB port (USB0), and other models have 2 USB ports (USB0 and USB1). The root directories of USB0 and USB1 are usb0:/ and usb1:/.

The FW allows you to repair and format the storage devices, as well as create, delete, and modify files or directories on the storage devices.

**Table 2** System directories in the CF card
Directory Name	Function
Root directory	Root directory of the CF card. The following files are stored in the root directory: Configuration file (cfg): The configuration file records the configuration items to be loaded when the device starts. Local certificate: certificate issued by the CA to the applicant. PAF file: product adaptation file, which contains specifications and cannot be modified. Signature database: includes the IPS signature database and antivirus signature database. KUR certificate file: device certificate obtained by the device after interacting with the certificate server through CMP. ca_config.ini: After the CA/RA certificate and local certificate are imported to the memory, the system generates the ca_config.ini file in the root directory of the CF card. After the device is restarted, it loads the CA/RA certificate and local certificate from the ca_config.ini file.
default-sdb	Stores the default signature database file and version information.
update	Stores post-upgrade signature database file and version information.
gpmbak	Stores the backup state machines of the GPM module.
loc	Stores location information.
umdb	Stores user information, including users' basic information, customized logo, and background image.
hidehttpdcertkey	Stores encrypted device default certificates and key pairs.
hidepkirsakey	Stores encrypted PKI key pairs.
cfgbak	Stores the backup configuration profile. The system automatically generates this directory only when the backup parameter is selected during the manual upgrade of the configuration profile.
download	Stores web page and image resources.
$_install_mod	Stores the dynamically loaded component packages.
isp	Stores ISP address files.
dhcp	Stores DHCP address pool data and client DUIDs. After DHCP data restoration is configured, the DHCP server generates lease.txt and conflict.txt files. The lease.txt file stores lease information, and the conflict.txt file stores conflicting IP addresses.
tracefile	Stores the exported temporary packet tracing files.
log	Stores system and diagnosis logs. Logs are information output during device operating. You can view logs to learn about service running status and functional module operating status on the device. If the stored log data occupies more space than that allowed in the log directory, the system overwrites the old log data with the new log data.
netconf	Stores the NETCONF connection and operating logs.