Property:nvram (partition)

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BoxMatrix >> System >> nvram (partition)

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Name-Collision - multiple objects in this wiki use the name nvram! nvram (avmenv) TODO nvram (chipcmd) Access persistent storage of configuration on Broadcom chipsets. nvram (partition) Proprietary nvram WLAN and Kernel configuration storage on Broadcom models.

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Linux-Partition

Partition:	nvram (partition)   -   type Part	Wiki	Freetz	IPPF	whmf	AVM	Web
Location:	System >> Linux-Partitions   -   Origin: AVM
Device:	mtdblock1, mtdblock4
Properties:	Firmware: 6.85 - 7.29
Function:	Proprietary nvram WLAN and Kernel configuration storage on Broadcom models.

Goto:   Dependencies   -   Model-Matrix   -   Missing Supportdata   -   SMW-Browser

Details

The nvram partition is a proprietary nvram WLAN and Kernel configuration storage on Broadcom models.
It is no known filesystem like the /nvram partitions on cable models but a proprietary system which contains
variable = value assignments similar to the Bootloader-Environment.

This partition is maintained by libnvram.so which is widely used by the Broadcom subsystem and its Chipset-Commands.
There are 2 differing usages of this partition:

The 7581 and 7582 use a 128 kB partition and only store WLAN configuration:
Excerpt from supportdata of a 7581 fw 7.16:

nvram content

size: 28625 bytes (36911 left)

acs_ifnames=wl0 wl1
acs_no_restrict_align=1
avm_wps_config_method=0x0188
boardnum=0000
bsd_role=0
hide_hnd_header=y
lan1_hwaddr=
lan1_ifname=guest
lan1_ifnames=wl0.1 wl1.1
lan1_wps_oob=disabled
lan1_wps_reg=enabled
lan_hwaddr=9C:C7:A6:xx:xx:xx
lan_ifname=lan
lan_ifnames=wl0 wl1
lan_wps_oob=disabled
lan_wps_reg=enabled
mevent_enable=1
router_disable=0
ssd_enable=0
support_hnd_pages=y
ure_disable=1
wl0.1_3gpplist=
wl0.1_akm=
wl0.1_anonai=anonymous.com
wl0.1_ap_isolate=0
wl0.1_assoc_retry_max=3
wl0.1_auth=0
wl0.1_auth_mode=
wl0.1_bss_enabled=0
wl0.1_bss_maxassoc=128

<snipped numerous lines>
ped hundreds of lines>

The 7530ax usea a 1 MB partition and stores WLAN and Kernel configuration:
Excerpt from supportdata of a 7530ax fw 7.29:

nvram content

/---------------------------------/
/|       UserSpace NVRAMs        |/
/---------------------------------/
lan_ifname=lan
lan_ifnames=wl0 wl1
lan1_ifname=guest
lan1_ifnames=wl0.1 wl1.1
wl0_acs_excl_chans=
wl0_maclist=
wl1_maclist=
lan_wps_oob=disabled
wl0_chanspec=0
wl1_chanspec=0
map_bss_names=
wl0_nctrlsb=lower
wl1_nctrlsb=lower
bsd_role=0
bsd_primary=192.168.1.1
bsd_helper=192.168.1.2
bsd_hport=9877
bsd_pport=9878
bsd_ifnames=
bsd_bounce_detect=180 2 3600
wps_version2=enabled
wps_device_name=FBox
wps_mfstring=AVM
wps_modelname=FBox
wps_modelnum=0000
boardnum=0000

<snipped numerous lines>

/---------------------------------/
/|      KernelSpace NVRAMs       |/
/---------------------------------/
pcie/1/1/aa2g=0x7
pcie/1/1/aa5g=0x7
pcie/1/1/aga0=0x02
pcie/1/1/aga1=0x02
pcie/1/1/aga2=0x02
pcie/1/1/agbg0=0x43
pcie/1/1/agbg1=0x43
pcie/1/1/agbg2=0x43
pcie/1/1/boardflags=0x00000000
pcie/1/1/boardflags2=0xC0000004
pcie/1/1/boardflags3=0x0
pcie/1/1/boardflags4=0x0003000E
pcie/1/1/boardnum=28756
pcie/1/1/boardrev=0x1209
pcie/1/1/boardtype=0x08C4
pcie/1/1/cckbw202gpo=0x0000
pcie/1/1/cckbw20ul2gpo=0x0000
pcie/1/1/ccode=US
pcie/1/1/devid=0x4495
pcie/1/1/dot11agduphrlrpox=0
pcie/1/1/dot11agduphrpo=0
pcie/1/1/dot11agduplrpo=0
pcie/1/1/dot11agofdmhrbw202gpo=0x5432
pcie/1/1/epagain5g=2
pcie/1/1/femctrl=0
pcie/1/1/low_adc_rate_en=1
pcie/1/1/macaddr=00:00:00:00:00:00
pcie/1/1/maxp2ga0=0x54
pcie/1/1/maxp2ga1=0x54
pcie/1/1/maxp2ga2=0x54
pcie/1/1/maxp5gb0a0=0x50

<snipped numerous lines>

Dependencies

Daily updated index of all dependencies of this partition. Last update: GMT.
A * in the Mod column marks info from Supportdata-Probes, which will always stay incomplete.
A ** in the Mod column marks info from Supportdata2 probes, which by their nature will stay way more incomplete.
A - in the Mod column marks manual research, the Firmware then shows where the item occurs, not the Relation.

Relation	Typ	Object	Mod	Firmware	Info	Origin
0 dependencies for this partition

Model-Matrix

Daily updated index of the presence, path and size of this partition for each model. Last update: 2024-12-20 07:02 GMT.
Showing all models using this partition. Click any column header (click-wait-click) to sort the list by the respective data.
The (main/scrpn/boot/arm/prx/atom/rtl) label in the Model column shows which CPU is meant for Multi-Linux models.
Note that this list comes from Supportdata-Probes, which can have arbitrary settings and come from different firmware versions.
It doesn't say much if a model is not listed here. It may be a missing supportdata file or just a disabled feature.

Model	Firmware	Device	Size
FRITZ!Box 7530 AX	7.20 - 7.29	mtdblock4	1.1M
FRITZ!Box 7581	6.85 - 7.17	mtdblock4	128k
FRITZ!Box 7582	6.98 - 7.15	mtdblock1, mtdblock4	128k
3 models use this partition

Missing Supportdata

The data in this article is incomplete due to missing Supportdata-Probes for the models listed below.
If you own any of these models and would like to help then please get in touch.

Model	Method	Info
FRITZ!Box WLAN 3270 IT	lua	http://fritz.box/support.lua
FRITZ!Box Fon ata	html	http://fritz.box/html/support.html
FRITZ!Box Fon ata 1020	html	http://fritz.box/html/support.html
FRITZ!Box Fon 5010	html	http://fritz.box/html/support.html
FRITZ!Box Fon 5012	html	http://fritz.box/html/support.html
FRITZ!Box Fon WLAN 7113 INT	html	http://fritz.box/html/support.html
Speedport W 501V	telnet
Speedport W 722V	console
Eumex 300 IP	telnet
9 models without supportdata probes

SMW-Browser

Property:nvram (partition)

Information is currently being retrieved from the backend.