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The File System
The File System
The SR OS file system is used to store files used and generated by the system, for example, image
files, configuration files, logging files and accounting files.
The file commands allow you to copy, create, move, and delete files and directories, navigate to a
different directory, display file or directory contents and the image version.
Although some of the storage devices on some SR OS platforms are not actually compact flash
devices (i.e., cf1: on the 7950 XRS is an internal SSD), the SR OS User Guides generally refer to
all storage devices as "compact flash".
Compact Flash Devices
The file system is based on a DOS file system (with an optional Reliance filesystem). In the 7950
XRS, each CCM has up to three storage devices numbered one through three. The names for these
devices are:
•
•
•
The above device names are relative device names as they refer to the devices local to the control
processor with the current console session. As in the DOS file system, the colon (":") at the end of
the name indicates it is a device.
The cf2: and cf3: compact flash devices on the 7950 XRS routers are removable and have an
administrative state (shutdown/no shutdown). cf1: is an internal SSD.
NOTE: To prevent corrupting open files in the file system, you should only remove a compact
flash that is administratively shutdown. SR OS gracefully closes any open files on the device, so it
can be safely removed.
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cf1:
cf2:
cf3:
7950 SR OS Basic System Configuration Guide
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