FORCE10 S4810P NVRAM

Hello I need your help.
we have force10 s4810p, the problem is present nvram in system.
so we change configuration and reload and kill my configuration.

FTOS#show file-systems

network rw ftp:

network rw ftp:

network rw ftp:

Size(b) Free(b) Feature Type Flags Prefixes
2056916992 2056859648 FAT32 USERFLASH rw flash:
FTOS#show bootvar
PRIMARY IMAGE FILE = system://A
SECONDARY IMAGE FILE = system://B
LOCAL CONFIG FILE = variable does not exist
PRIMARY HOST CONFIG FILE = variable does not exist
SECONDARY HOST CONFIG FILE = variable does not exist
PRIMARY NETWORK CONFIG FILE = variable does not exist
SECONDARY NETWORK CONFIG FILE = variable does not existCURRENT IMAGE FILE = system://A
CURRENT CONFIG FILE 1 = variable does not exist
CURRENT CONFIG FILE 2 = variable does not exist
CONFIG LOAD PREFERENCE = local first
BOOT INTERFACE GATEWAY IP ADDRESS = 192.168.1.1
Reload Mode = bmp

FTOS#show boot system stack-unit all

Current system image information in the system:

Type Boot Type A B

Stack-unit 0 FLASH BOOT 9.1(0.0)[boot] 8.3.7.0
Stack-unit 1 is not present.
Stack-unit 2 is not present.
Stack-unit 3 is not present.
Stack-unit 4 is not present.
Stack-unit 5 is not present.
Stack-unit 6 is not present.
Stack-unit 7 is not present.
Stack-unit 8 is not present.
Stack-unit 9 is not present.
Stack-unit 10 is not present.
Stack-unit 11 is not present.

thank you!