Dell Latitude E5540 Statement of Volatility - Page 2

Description Reference Designator Volatility Description User Accessible for external data Remedial Action (Action necessary to prevent loss of data) DP hub FW mSATA TPM Controller Hard drive systems use DDR3L (UV4-UV7) for frame buffer U7 JMINI2 U25 User replaceable This is volatile memory for DP No hub FW (1Mbit). mSATA module would share Yes with WWAN module on full size mini-card. Non Volatile memory (SSD) Non Volatile memory, 2K bits No (256 bytes) ROM Non Volatile magnetic media, yes various sizes in GB N/A Low level format N/A Low level format CD- User Non Volatile optical media. Yes ROM/RW/ replaceable DVD/ DVD+RW/ Diskette Drives Low level format/erase CAUTION: All other components on the system board lose data if power is removed from the system. Primary power loss (unplugging the power cord and removing the battery) destroys all user data on the memory (DDR3L, 1333/1600MHz). Secondary power loss (removing the on-board coin-cell battery) destroys system data on the system configuration and time-of-day information. All other components on the motherboard will lose data once power is removed from the system. Primary power loss (Unplug the power cord and remove the battery) will destroy all user data on the memory (DDR3L, 1333/1600MHz). Secondary power loss (removing the on board coin-cell battery) will destroy system data on the system configuration and time-of-day information. In addition, to clarify memory volatility and data retention in situations where the system is put in different ACPI power states the following is provided (those ACPI power states are S0, S1, S3, S4 and S5): S0 state is the working state where the dynamic RAM is maintained and is read/write by the processor. S1 state is a low wake-up latency sleeping state. In this state, no system context is lost (CPU or chip set) and hardware maintains all system contexts. S3 is called "suspend to RAM" state or stand-by mode. In this state the dynamic RAM is maintained. Dell systems will be able to go to S3 if the OS and the peripherals used in the system supports S3 state. Linux, Win7 and Win8 support S3 state. S4 is called "suspend to disk" state or "hibernate" mode. There is no power. In this state, the dynamic RAM is not maintained. If the system has been commanded to enter S4, the OS will write the system context to a non-volatile storage file and leave appropriate context markers. When the system is coming back to the working state, a restore file from the non-volatile storage can occur. The restore file has to be valid. Dell systems will be able to go to S4 if the OS and the peripherals support S4 state. Win7 and Win8 support S4 state. S5 is the "soft" off state. There is no power. The OS does not save any context to wake up the system. No data will remain in any component on the system board, i.e. cache or memory. The system will require a complete boot when awakened. Since S5 is the shut off state, coming out of S5 requires power on which clears all registers. The following table shows all the states supported by Dell Latitude™E5440/E5540: Model Number Model Number S0 S1 S3 S4 S5 Dell Latitude™ E5440 X Dell Latitude™ E5540 X X X X X X X