Only available half the ROM size on my WZR-600DHP2.

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Sopalajo de Arrierez
DD-WRT Novice


Joined: 04 Dec 2015
Posts: 16

PostPosted: Wed Jun 10, 2020 23:22    Post subject: Only available half the ROM size on my WZR-600DHP2. Reply with quote
I have a Buffalo WZR-600DHP2 with DD-WRT r43334 just installed.

I have activated the JFFS flash partition, and I see now:

Code:
root@WZR600DHP2:~# df -h
Filesystem                Size      Used Available Use% Mounted on
/dev/root                23.8M     23.8M         0 100% /
/dev/mtdblock/6          55.0M      1.5M     53.5M   3% /jffs
/dev/sda1               940.3M     27.2M    864.6M   3% /opt


It seems strange to me a partition size of only
Code:
55.0MB
, as long as this router is supposed to have 128MB Flash (and 256MB RAM), as researched: https://oldwiki.archive.openwrt.org/toh/buffalo/wzr-600dhp2 .

In order to compare, I am checking my Mikrotik RouterBoard RB951Ui-2HnD (128MB Flash ROM too) with OpenWRT v18 installed:

Code:
luis@OpenWrt:/$ df -h
Filesystem                Size      Used Available Use% Mounted on
/dev/root                 2.5M      2.5M         0 100% /rom
tmpfs                    61.1M    768.0K     60.3M   1% /tmp
/dev/ubi0_2             102.8M     55.1M     43.0M  56% /overlay
overlayfs:/overlay      102.8M     55.1M     43.0M  56% /
tmpfs                   512.0K         0    512.0K   0% /dev


As can be seen, it detects
Code:
102,8MB
, much more close to the real 128MB real size.

Is there any error here? Why DD-WRT only sees about half of my ROM in the WZR-600DHP2?
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PostPosted: Thu Jun 11, 2020 1:48    Post subject: Reply with quote
cat /proc/mtd output shows what...
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Sopalajo de Arrierez
DD-WRT Novice


Joined: 04 Dec 2015
Posts: 16

PostPosted: Thu Jun 11, 2020 22:52    Post subject: Output of /proc/mtd : Reply with quote
Here you have, for the Buffalo DD-WRT:
Code:

~# cat /proc/mtd
dev:    size   erasesize  name
mtd0: 00080000 00020000 "boot"
mtd1: 00160000 00020000 "nvram"
mtd2: 01f00000 00020000 "linux"
mtd3: 01d60000 00020000 "rootfs"
mtd4: 01f00000 00020000 "linux2"
mtd5: 01d60000 00020000 "rootfs2"
mtd6: 03700000 00020000 "ddwrt"


It seems that 3700000hex equals to about 60MB .

And, in order to compare, the output of the Mikrotik RouterBoard:

Code:
$ cat /proc/mtd
dev:    size   erasesize  name
mtd0: 00040000 00020000 "booter"
mtd1: 003c0000 00020000 "kernel"
mtd2: 07c00000 00020000 "ubi"


This one shows, indeed, 7c00000hex , that is close to 120MB .
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