Cisco Systems 57712, UCSCPCIEBTG manual Patrol Scrub, Demand Scrub, Altitude

BIOS Parameters by Server Model

Advanced BIOS Parameters for C22 and C24 Servers

Name	Description
Patrol Scrub	Whether the system actively searches for, and corrects, single
	bit memory errors even in unused portions of the memory on
	the server. This can be one of the following:
	• Disabled—The system checks for memory ECC errors
	only when the CPU reads or writes a memory address.
	• Enabled—The system periodically reads and writes
	memory searching for ECC errors. If any errors are found,
	the system attempts to fix them. This option may correct
	single bit errors before they become multi-bit errors, but
	it may adversely affect performance when the patrol scrub
	is running.
Demand Scrub	Whether the system corrects single bit memory errors
	encountered when the CPU or I/O makes a demand read. This
	can be one of the following:
	• Disabled— Single bit memory errors are not corrected.
	• Enabled— Single bit memory errors are corrected in
	memory and the corrected data is set in response to the
	demand read.
Altitude	The approximate number of meters above sea level at which the
	physical server is installed. This can be one of the following:
	• Auto—The CPU determines the physical elevation.
	• —The server is approximately 300 meters above sea level.
	• —The server is approximately 900 meters above sea level.
	• —The server is approximately 1500 meters above sea
	level.
	• —The server is approximately 3000 meters above sea
	level.

Cisco UCS C-Series Servers Integrated Management Controller CLI Configuration Guide, Release 1.5

OL-28893-01 193