NAND Flash Wear Leveling
Definition
The SSD controller's policy of spreading writes across physical blocks so no single block wears out first. The side effect for forensics is that the physical block holding a file may have nothing to do with the logical block the OS sees.
Related terms
- BIOS / UEFI
- Firmware on a flash chip on the motherboard that runs at power-on, initialises hardware, and hands control to a bootloader. UEFI is...
- Chipset (PCH)
- The motherboard logic that bridges CPU, RAM, PCIe lanes, SATA, USB and the firmware (UEFI/BIOS). On Intel boards the Platform Controller Hub;...
- CMOS Battery
- A small lithium cell (typically CR2032) that keeps the real-time clock and a few firmware settings alive when the system is unplugged....
- Order of Volatility
- The sequence in which digital evidence should be collected, ranked from most to least transient. Defined in RFC 3227. CPU registers and...
- TRIM
- A command issued by the file system to the flash controller identifying blocks that are no longer in use, so the controller...
Explained in
- Computer Hardware Fundamentals for Forensic ExaminersThe SSD controller's policy of spreading writes across physical blocks so no single block wears out first. The side effect for forensics is that the physical b...