[Solved] MicroSD card - "Unknown Partition Table"

felixculpa · 2014-03-28 19:09:54

Hi all, not sure if this is the right place to ask but I want to crowdsource the wisdom of the archlinux community because I trust you guys more than others.

My problem is that I have a microSD card that seems to have somehow become corrupted. I use it in a Rockbox'ed DAP and I have about 31 point something gigabytes of .ogg files on it than I am now unable to access!

Running dmesg gives me the message "unknown partition table" and when I look through gparted it says the capacity is only 30MiB I believe. I was going to use the TestDisk program to try recover the data but it tells me the proper capacity needs to be detected for recovery to work, which it isn't because like I said, only 30MiB of the card is showing up at all anywhere I look.

I'm at a loss and would be greatly indebted to whoever helps me recover my music... I spent a lot of time collecting and curating this small collection and would be a huge loss in that I wasted a lot of time putting it together.

Last edited by felixculpa (2014-03-30 05:44:59)

nomorewindows · 2014-03-28 19:45:18

You might need to mount it as a non-partition table media (e.g. /dev/sdx).

felixculpa · 2014-03-29 17:14:44

I tried that earlier and it was giving me another message... I would post what that was but now it seems to be giving a totally new thing.

[ 7886.443183] usb 3-2: new high-speed USB device number 7 using ehci-pci
[ 7886.587544] ums-realtek 3-2:1.0: USB Mass Storage device detected
[ 7886.605750] scsi6 : usb-storage 3-2:1.0
[ 7887.611253] scsi 6:0:0:0: Direct-Access     Generic- Multi-Card       1.00 PQ: 0 ANSI: 0 CCS
[ 7894.509768] sd 6:0:0:0: [sdb] Attached SCSI removable disk
[ 7939.814754] sd 6:0:0:0: [sdb] Test WP failed, assume Write Enabled
[ 7939.819067] sd 6:0:0:0: [sdb] Asking for cache data failed
[ 7939.819088] sd 6:0:0:0: [sdb] Assuming drive cache: write through
[ 7990.616387] sd 6:0:0:0: [sdb] Test WP failed, assume Write Enabled
[ 7990.620250] sd 6:0:0:0: [sdb] Asking for cache data failed
[ 7990.620269] sd 6:0:0:0: [sdb] Assuming drive cache: write through
[ 8041.846810] sd 6:0:0:0: [sdb] Test WP failed, assume Write Enabled
[ 8041.850653] sd 6:0:0:0: [sdb] Asking for cache data failed
[ 8041.850675] sd 6:0:0:0: [sdb] Assuming drive cache: write through
[ 8093.078736] sd 6:0:0:0: [sdb] Test WP failed, assume Write Enabled
[ 8093.083777] sd 6:0:0:0: [sdb] Asking for cache data failed
[ 8093.083799] sd 6:0:0:0: [sdb] Assuming drive cache: write through

Edit: Ok I tried reinserting it and it seems those "failed" messages didn't show up again. However when I try to

sudo mount /dev/sdb /mnt

it gives me:

no medium found on /dev/sdb

but I can see it under /dev/

That is on the main laptop, on my netbook it gives me

mount: wrong fs type, bad option, bad superblock on /dev/mmcblk0,
       missing codepage or helper program, or other error

       In some cases useful info is found in syslog - try
       dmesg | tail or so

Last edited by felixculpa (2014-03-29 18:17:18)

nomorewindows · 2014-03-29 19:26:23

You're using a card reader. Sometimes you have to plug the card reader in first and then the media. It's a little funky at times. They don't seem to want to cooperate.

felixculpa · 2014-03-30 05:44:32

I've never had any issues with them working together like this before, but it looks like you were right. It finally read the card as normal (and I promptly copied all data off of the card!).

Thanks for the help.

Arch Linux

#1 2014-03-28 19:09:54

[Solved] MicroSD card - "Unknown Partition Table"

#2 2014-03-28 19:45:18

Re: [Solved] MicroSD card - "Unknown Partition Table"

#3 2014-03-29 17:14:44

Re: [Solved] MicroSD card - "Unknown Partition Table"

#4 2014-03-29 19:26:23

Re: [Solved] MicroSD card - "Unknown Partition Table"

#5 2014-03-30 05:44:32

Re: [Solved] MicroSD card - "Unknown Partition Table"

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