Re: [ts-7000] Copy of SD Card mounts read-only upon boot

[Robert Ulbrich <>]

Eric,

Try looking at /proc/mounts to see how things are really mounted. There is also a way to make an SD card permanently read-only through software (look at sdctl for details).

I've had similar issues with the SD cards mounting RO, even though the write-protect switch was set to the correct position. Everything worked fine with a new SD card.

Robert


eric.robishaw wrote:

 

I've got an SD card setup the way I want, make a copy of it to another SD card (same size):

dd -if=/dev/sdb of=/mnt/sdbackup.dd

put the new disk in, and reverse:

dd -if=/mnt/sdbackup.dd of=/dev/sdb

Start the duplicated SD card, get the busy prompt, type exit.
Then I get a bunch of errors "Read-only file system". It also takes about 5 minutes to boot.

mount reveals that only the tmpfs on /dev is mounted ro.

I've done it twice with the same results.
What am I doing wrong?

Thanks,
Eric

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