How does the S7700&S9700 write logs to CF card

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The logs are cached instead of being immediately written into the log files on the CF card. The S7700&S9700 supports two methods to write the logs:
On the S7700&S9700, the cache can store 33 KB logs. When the cache is full, the logs are written into the log file on the CF card.
You can also store logs to the CF card manually. That is, run the save logfile command in the user view. The information in the cache can be immediately written into the log file on the CF card.

NOTE:
Before providing the logs to R&D, import the logs into log files.

Other related questions:
What are the functions of the CF card of the S7700&S9700
The S7700&S9700 series switches support standard CF cards. The default capacity of a CF card is 512 MB, expandable to 1 GB or 2 GB. The CF card is used to store system files, configuration files, paf, License, and log files. The S7700&S9700 series switches can start by using the startup file in the CF card. In this case, the system software package is stored on the CF card. It is required to specify the system software package on the CF card as the boot file. On the S7700&S9700 series switches, logs can be stored on the CF cards. Do not use the uncertified CF cards to prevent unpredictable problems.

How is the S7700&S9700 grounded
The chassis of an S7712 or S7706 has a ground screw on the lower right part of the front, and the chassis of an S7703 has a ground screw on the lower left part of the rear. The chassis of an S9712, S9706, or S9703 has a ground screw on the lower left part of the rear. Ensure correct grounding to guarantee the normal operation of the S7700&S9700.

How does the S12700 write logs to eUSB card
The logs are cached instead of being immediately written into the log files on the eUSB card. The S12700 supports two methods to write the logs: On the S12700, the cache can store 33 KB logs. When the cache is full, the logs are written into the log file on the eUSB card. You can also store logs to the eUSB card manually. That is, run the save logfile command in the user view. The information in the cache can be immediately written into the log file on the eUSB card. NOTE: Before providing the logs to R&D, import the logs into log files.

Does the S7700&S9700 support hot backup
The S7700&S9700 supports hot backup. When the master main control board fails, the S7700&S9700 automatically switches services to the slave board without interrupting the services. The software versions of the master board and slave board must be the same. You can also run the slave switchover command to trigger the active/standby switchover manually. [HUAWEI] slave switchover Caution!!! Confirm switch slave to master[Y/N]?y Ensure that data on the master board is backed up to the slave board before you trigger the master/slave switchover. That is, the slave board is in the real-time backup state. If the board is backing up data, you cannot perform switchover. In this case, you can run the display switch state command to view the status of the slave board. display switch state Master MPU: Realtime and routine backup. Slave MPU: Receiving realtime and routine data.

What format of the file system does the CF card of an S series switch use
The CF card of an S series switch uses a file system in FAT16 format.

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