Hi,

I'm trying to set up extroot using the SD-card reader on the Huawei E3372h-153. I'm using a TP-Link WDR3600 running Chaos Calmer 15.05.1.

I've followed the guide on the wiki, including the steps to avoid usb-modeswitch. The router recognizes the card reader, but still refuses to mount any partition as /overlay. Mounting anywhere else (for instance to /mnt/data) works fine. See the dmesg snippet below:

[   11.520000] usb-storage 1-1.2:1.3: USB Mass Storage device detected
[   11.530000] scsi host0: usb-storage 1-1.2:1.3
[   12.530000] scsi 0:0:0:0: Direct-Access     HUAWEI   TF CARD Storage  2.31 PQ: 0 ANSI: 2
[   12.550000] sd 0:0:0:0: [sda] Attached SCSI removable disk
[   24.510000] sd 0:0:0:0: [sda] 15360000 512-byte logical blocks: (7.86 GB/7.32 GiB)
[   24.520000] sd 0:0:0:0: [sda] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA
[   24.530000]  sda: sda1 sda2 sda3
[   24.540000] block: extroot: cannot find device sda1
[   24.550000] mount_root: switching to jffs2 overlay
[   24.590000] eth0: link down
[   24.600000] procd: - early -
[   24.610000] procd: - watchdog -
[   25.340000] procd: - ubus -
[   26.360000] procd: - init -
[   27.960000] EXT4-fs (sda2): mounted filesystem with ordered data mode. Opts: 
[   28.060000] Adding 338940k swap on /dev/sda3.  Priority:-1 extents:1 across:338940k

Why will it not mount sda1, when its detected on the previous line? My fstab looks like this (I've tried using both UUID and the path to the partition):

config 'global'
    option    anon_swap    '0'
    option    anon_mount    '0'
    option    auto_swap    '1'
    option    auto_mount    '1'
    option    delay_root    '15'
    option    check_fs    '0'

config 'mount'
    option    target    '/overlay'
    option    device    '/dev/sda1'
    option    enabled    '1'

config 'swap'
    option    uuid    '6ad2199c-2e61-4062-9182-b00962424f0a'
    option    enabled    '1'

config 'mount'
    option    target    '/mnt/data'
    option    uuid    'de64d2d4-07b0-481f-8f77-1b5a422eb2dc'
    option    enabled    '1'

Has anyone managed to get extroot working with this modem? Any help would be appreciated! smile