The file system is based on a DOS file system. On the 7705 SAR, each CSM has an integrated compact flash device. The names for these devices are:
cf3:
cf3-A:
cf3-B:
The first device name above (cf3:) is a relative device name in that it refers to the device local to the control processor on the CSM running the current console session. As in the DOS file system, the colon (‟:”) at the end of the name indicates that it is a device.
The second and third device names (cf3-A: and cf3-B:) are absolute device names that refer directly to the device on CSM A or CSM B (CSM B applies only to chassis with redundant CSMs).
The device cf3-B: does not apply to the following chassis because they do not have redundant CSMs:
7705 SAR-A
7705 SAR-Ax
7705 SAR-M
7705 SAR-H
7705 SAR-Hc
7705 SAR-Wx
7705 SAR-X
The 7705 SAR-8 Shelf V2, 7705 SAR-18, 7705 SAR-H, and 7705 SAR-M have removable compact flash cards.
The 7705 SAR-A, 7705 SAR-Ax, 7705 SAR-Hc, and 7705 SAR-Wx do not have removable compact flash cards; they are shipped with integrated memory that is used to store system boot software, OS software, and configuration files and logs.
The 7705 SAR-X has two removable compact flash cards but they are not field-replaceable. Replacement of the devices is done as a repair service.
On the 7705 SAR-18, cf3: is used to store the software image required for system startup and operation, including the application load. The 7705 SAR-18 CSM also has two optional compact flash slots for two compact flash devices (cf1: and cf2:). These compact flash devices are also referred to as cf1-A:/cf1-B: and cf2-A:/cf2-B: to indicate whether they are on CSM A or CSM B. All the compact flash devices can be used to store software upgrades, statistics, logging files, accounting files, scripts, and configuration data.