/opt corrupt after update to 3.6

[Thomas Scheller]

Hi,
after update to 3.6 my /opt filesystem is corrupt

    root@BS:~ #ls /opt/
    ls: /opt/fritzboxcallmon.addr: Input/output error
    mini_fo  nfs
    root@BS:~ #rm /opt/fritzboxcallmon.addr
    rm: cannot stat '/opt/fritzboxcallmon.addr': Input/output error
    root@BS:/opt #

How can I format /opt ? There is no mkfs command.

Greetz
   Thomas

[Patrick Schmidt]

Try following steps to solve the problem:

#Mount mini_fo storage in RAM at startup
nvram set mini_fo=ram && nvram commit && nvram reboot

#delete jffs-Partition, repeat if it doesnt work, then reboot
mtd_erase /dev/mtd/3 && nvram reboot

#Mount mini_fo storage in jffs again at startup
nvram set mini_fo=jffs && nvram commit && nvram reboot

#Tip: set device mounting to old behaviour like in versions before 0.3.6
nvram set mini_fo=off && nvram commit && nvram reboot

[Thomas Scheller]

Step 2 does not work

    root@BS:~ #mtd_erase /dev/mtd/3  && nvram reboot
    error:: Permission denied
    Could not open mtd device: /dev/mtd/3
    root@BS:~ #

Content of /dev/mtd:

    root@BS:~ #ls -l /dev/mtd
    crw-rw-rw-    1 root     root      90,   0 Nov  4 13:03 0
    cr-r-r-    1 root     root      90,   0 Nov  4 13:03 0ro
    crw-rw-rw-    1 root     root      90,   1 Nov  4 13:03 1
    cr-r-r-    1 root     root      90,   1 Nov  4 13:03 1ro
    crw-rw-rw-    1 root     root      90,   2 Nov  4 13:03 2
    cr-r-r-    1 root     root      90,   2 Nov  4 13:03 2ro
    crw-rw-rw-    1 root     root      90,   3 Nov  4 13:03 3
    crw-rw-rw-    1 root     root      90,   4 Nov  4 13:03 4
    cr-r-r-    1 root     root      90,   4 Nov  4 13:03 4ro
    crw-rw-rw-    1 root     root      90,   5 Nov  4 13:03 5
    cr-r-r-    1 root     root      90,   5 Nov  4 13:03 5ro
    root@BS:~ #

mini_fo is set to ram

    root@BS:~ #nvram get mini_fo
    ram
    root@BS:~ #

I can read from /dev/mtd/3 with e.g. less

[Thomas Scheller]

I found it myself.

The minor numbers of the /dev/mtd devices are wrong.

Replace step 2 with the following:

mknod /var/mtd3rw c 90 6 && mtd_erase /var/mtd3rw && nvram reboot

Thanks to coolman1982 for help and the great bitswitcher firmware!