CrunchBang Linux

jnarwhal

New Member

From: Chicago, IL, USA

Registered: 2012-07-31

Posts: 6

SD Card Reader problem on Acer Aspire One 756 [Solved]

I am unable to mount SD cards on my Acer Aspire One 756-2420 (running Crunchbang Waldorf).
If I start the machine with the card in the slot, it mounts, but otherwise it won't detect it.
I can automatically mount and unmount these cards on someone else's Ubuntu laptop, but not on this machine's internal card reader.

lf I run lspci, this is what I find:

04:00.1 SD Host controller: Broadcom Corporation NetXtreme BCM57765 Memory Card Reader (rev 10)

If I run dmesg, I see error messages like this one that state that the card was removed during data transfer (even if it is still in the reader):

[ 2652.124046] mmc0: Card removed during transfer!

How should I proceed?

Last edited by jnarwhal (2012-11-20 17:49:46)

fatmac

#! Die Hard

Registered: 2012-11-14

Posts: 1,120

Re: SD Card Reader problem on Acer Aspire One 756 [Solved]

Hi, because it says the card was removed during data transfer, you may have a corrupt file system.

What I would do first is to make a copy of the card using dd, & try loop mounting it to see if the filesystem is corrupt.

Second, I would run a fsck on the loop mounted card image, & hopefully, that will be all that's needed, if that succeeds, do a fsck on the actual card & all should be well again.

If the fsck of the loop mounted card image fails, I think your solution is to re format it; there are other more complicated ways of trying to recover the data, but unless it's very important, I personally, would not go there.

---

Linux since 1999
A good general beginners book for Linux :- http://rute.2038bug.com/index.html.gz
A good Debian read :- http://debian-handbook.info/get/now/

dura

Bloated Gimp

From: interzone

Registered: 2012-09-15

Posts: 2,081

Re: SD Card Reader problem on Acer Aspire One 756 [Solved]

I'd copy the sd card, on another computer if you say you can, and need the data that is on it.

Then I'd format it using gparted.

Then

mount -a

to mount all unmounted extra filesystemthingies

In regard to recovering the contents, file-roller or other compression apps are useful. Save the contents as zip if you can.

Last edited by dura (2012-11-20 14:37:40)

jnarwhal

New Member

From: Chicago, IL, USA

Registered: 2012-07-31

Posts: 6

Re: SD Card Reader problem on Acer Aspire One 756 [Solved]

Thanks! 
At this point, I'm just using an outboard SD card reader with this laptop. If I find a better solution, I'll post it here.