> # Saving Cores

> You can save cores (from the active supervisor module, the standby supervisor module, or any switching module) to an external CompactFlash (slot 0) or to a TFTP server in one of two ways:

> - On demand—Copies a single file based on the provided process ID.
> - Periodically—Copies core files periodically as configured by the user.

> A new scheme overwrites any previously issued scheme. For example, if you perform another core log copy task, the cores are periodically saved to the new location or file.

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