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Property:nvram (partition)
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Name-Collision - multiple objects in this wiki use the name nvram!
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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 containsvariable = 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: 2024-04-19 06:37 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) label in the Model column shows which CPU is meant for models with multiple Linux instances.
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.
