What protects against 8 – bit parity mode error detection?

What protects against 8 – bit parity mode error detection?

A.
Online sparing

B.
HP SmartMemory

C.
Mirrored Memory

D.
Double Chip Sparing

E.
Lockstep Memory mode

Explanation:
Lockstep- A mode that extends SDDC capability from x4 DRAM devices to x8
devices by using two memory channels as a single-wide channel to transfer a longer data word.
The long data word is transferred each time using 16 redundant bits to provide 8-bit error
detection and 8-bit error correctionto protect against a single DRAM failure. While Lockstep

mode does not reduce the total amount of available memory, it degrades performance.
http://h20000.www2.hp.com/bc/docs/support/SupportManual/c03179047/c03179047.pdf – Page 2