Dell Inspiron 15 3515 Statement of Volatility

Statement of Volatility – Inspiron 15 3515 CAUTION: A CAUTION indicates either potential damage to hardware or loss of data and tells you how to avoid the problem. The Inspiron 15 3515 contains both volatile and non-volatile components. Volatile components lose their data immediately after power is removed from the component. Non-volatile components continue to retain their data even after power is removed from the component. The following Non-volatile components are present on the Inspiron 15 3515 system board. Table 1. List of Non-Volatile Components on System Board

Remedial Action

Reference User Accessible

Description Volatility Description (Action necessary to

Designator for external data

prevent loss of data)

Panel EEDID Part of panel Non Volatile memory, 128bytes. No Part of panel assembly EEPROM assembly

System BIOS UC7 Non Volatile memory, System BIOS, No N/A

embedded controller and Video BIOS for basic boot operation, PSA (on board diags), PXE diags.

System Two SODIMM Volatile memory in OFF state Yes Power off system Memory – connectors: DDR4 memory

NOTE: See state definitions later in text.

JDIMM1,2 present One to Two modules must be populated.

System On System Non Volatile memory 512 Bytes. No N/A memory SPD memory EEPROM SODIMM(s)

Stores memory manufacturer data and

JDIMM1,2

timing information for correct operation of

present

system memory.

RTC CMOS – UC1 Non Volatile memory, 256 Bytes. No Remove the onboard BBRAM

(battery Stores CMOS information. coin cell

backed up)

battery

Video memory No

For UMA Volatile memory in off state. UMA uses

– frame buffer

platform: using main system memory size allocated out of system DDR4 main memory.

Hard drive(s) User Yes Low level format

SSD (solid

replaceable

State flash drive). various sizes in GB

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 (DDR4, 2400/2667 MHz). Secondary power loss (removing the on-board coin-cell battery) destroys 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. Win10 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 nonvolatile 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. Win10 support S4 state.