Dell PowerEdge R910 - Page 56

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Dell PowerEdge R910 Technical Guide 56
FRU stores the PPID, manufacturing date etc.
Battery-Backed Cache: Stores the data if the
cache is not cleared and battery backup unit is
enabled in the case of a power loss.
How is data input to this memory?
FRU/CPLD data is preprogrammed at board
build.
NVSRAM is updated by the storage controller
Flash is updated by Dell provided update
package
Cache stores the data before getting written to
the disks when WriteBack policy is enabled with
battery backup.
How is this memory write protected?
FRU is not write protected but other
components detailed above in the Size row are
software write protected.
Remarks
PERC H700i controller is optional
Dell PERC H200i storage controller Flash/NVSRAM/FRU (if applicable)
Size:
FRU: 256 Bytes
Boot ROM: 8 KB
Flash: 8 MB
NVSRAM: 128 KB
Type [Flash PROM, EEPROM]:
Flash (NOR), EEPROM and NVSRAM
Can user programs or operating system write
data to it during normal operation?
No
Does it retain data when powered off?
Yes
Purpose? [boot code]
Flash stores the storage controllers firmware
NVSRAM stores the controller configuration
FRU stores the PPID, manufacturing date etc.
How is data input to this memory?
FRU data is preprogrammed at board build.
NVSRAM is updated by the storage controller
Flash is updated by Dell provided update
package
How is this memory write protected?
FRU is not write protected but everything else is
software write protected
Remarks
PERC H200i controller is optional
Server (4- or 16-drive SAS) Backplane Storage Controller Memory
Size:
32KB
Type [Flash PROM, EEPROM]:
Embedded Microcontroller Flash
Can user programs or operating system write
data to it during normal operation?
No
Does it retain data when powered off?
Yes
Purpose? [boot code]
Stores the server storage backplane FW and FRU