Cisco Systems UCSCPCIEBTG, 57712 manual Sparing Mode, Mirroring Mode

BIOS Parameters by Server Model

Advanced BIOS Parameters for C260 Servers

Name	Description
Sparing Mode	The sparing mode used by the CIMC. This can be one of the
	following:
	• —The spared memory is allocated at the rank level.
	• DIMM Sparing—The spared memory is allocated at the
		DIMM level.
	Note	This option is used only if is set to
		Sparing.
Mirroring Mode	Mirroring is supported across Integrated Memory Controllers
	(IMCs) where one memory riser is mirrored with another. This
	can be one of the following:
	• Intersocket—Each IMC is mirrored across two sockets.
	• Intrasocket—One IMC is mirrored with another IMC in
		the same socket.
	Note	This option is used only if is set to
		Mirroring.
DRAM Refresh rate	Allows you to set the rate at which the DRAM cells are
	refreshed. This can be one of the following:
	• 1x—DRAM cells are refreshed every 64ms.
	• 2x—DRAM cells are refreshed every 32ms.
	• 3x—DRAM cells are refreshed every 21ms.
	• 4x—DRAM cells are refreshed every 16ms.
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.

	Cisco UCS C-Series Servers Integrated Management Controller CLI Configuration Guide, Release 1.5
228	OL-28893-01