I'm still waiting for delivery of a pre-installed SD card and card reader from The PiHut for my Raspberry Pi so, fed up waiting, I bought another card reader from Anglian Internet in Norwich.
I can now see a 16GB card from my digital camera, but the machine still won't see the other two 8GB cards which I used for a previous attempt at writing images.
Are they toast or can I recover them in order to write images to them?
Chris Walker cdw_alug@the-walker-household.co.uk
I can now see a 16GB card from my digital camera, but the machine still won't see the other two 8GB cards which I used for a previous attempt at writing images.
I think "won't see" will need defining for anyone to help, but it sounds like toast to me.
Regards,
On Fri, Dec 07, 2012 at 12:54:58PM +0000, MJ Ray wrote:
Chris Walker cdw_alug@the-walker-household.co.uk
I can now see a 16GB card from my digital camera, but the machine still won't see the other two 8GB cards which I used for a previous attempt at writing images.
I think "won't see" will need defining for anyone to help, but it sounds like toast to me.
If they're simply unformatted (or the formatting is corrupt) they won't pop up a window with their contents will they?
Chris Green cl@isbd.net
On Fri, Dec 07, 2012 at 12:54:58PM +0000, MJ Ray wrote:
Chris Walker cdw_alug@the-walker-household.co.uk
I can now see a 16GB card from my digital camera, but the machine still won't see the other two 8GB cards which I used for a previous attempt at writing images.
I think "won't see" will need defining for anyone to help, but it sounds like toast to me.
If they're simply unformatted (or the formatting is corrupt) they won't pop up a window with their contents will they?
Probably not, but they should still produce diagnostic messages somewhere in /var/log (look at the Last Modified times), or you can try using dmesg, mount (maybe "sudo mount -t auto /dev/mmcblk0 /mnt") and/or "sudo fdisk -l" from a terminal and see what the error is.
If they're unformatted or misformatted, mount will fail but fdisk may succeed. If they're completely defective, I'd expect dmesg or /var/log to show errors or deny there is any card inserted.
Hope that helps,
On 07/12/12 14:05, MJ Ray wrote:
Chris Green cl@isbd.net
On Fri, Dec 07, 2012 at 12:54:58PM +0000, MJ Ray wrote:
Chris Walker cdw_alug@the-walker-household.co.uk
I can now see a 16GB card from my digital camera, but the machine still won't see the other two 8GB cards which I used for a previous attempt at writing images.
I think "won't see" will need defining for anyone to help, but it sounds like toast to me.
If they're simply unformatted (or the formatting is corrupt) they won't pop up a window with their contents will they?
Probably not, but they should still produce diagnostic messages somewhere in /var/log (look at the Last Modified times), or you can try using dmesg, mount (maybe "sudo mount -t auto /dev/mmcblk0 /mnt") and/or "sudo fdisk -l" from a terminal and see what the error is.
If they're unformatted or misformatted, mount will fail but fdisk may succeed. If they're completely defective, I'd expect dmesg or /var/log to show errors or deny there is any card inserted.
fdisk -l doesn't list the discs at all. That's *my* definition of 'can't see them' ;-)
If I try a 16GB card from my digital camera, that does appear in the fdisk -l list.
I thought that if I could use the card from the camera, could the camera use the 2 8GB cards? It can but even though it says that it's formatted them, they still don't appear when run against the fdisk command.
But, if I check dmesg, this appears (with a new card reader) :- scsi 5:0:0:0: Direct-Access USB2.0 CARD-READER 1.01 PQ: 0 ANSI: 2 sd 5:0:0:0: Attached scsi generic sg3 type 0 sd 5:0:0:0: [sdc] Attached SCSI removable disk sd 4:0:0:0: [sdc] 7710720 512-byte logical blocks: (3.94 GB/3.67 GiB)
But they're 8GB discs, not 3.67 so they're not reporting the size correctly but I'm guessing that could be due to the camera formatting.
I then tried to mount one of them as you suggested but despite dmesg indicating /dev/sdc, I get the error 'no medium found on /dev/sdc'.
I'm thinking of popping along to the Raspberry Pi meet in Norwich tomorrow to see if anybody there can do anything with them. If not, there are a couple of decent pubs nearby, so it won't be a wasted journey ;-)
Chris Walker wrote:
I thought that if I could use the card from the camera, could the camera use the 2 8GB cards? It can but even though it says that it's formatted them, they still don't appear when run against the fdisk command.
That just reminded me. Not all cameras use usb-storage, do they? There's Picture Transfer Protocol and its evil cousins Microsoft Media Transfer Protocol and Microsoft MTPZone. I don't know if using the card in such a camera would do odd things - does the camera connect to the PC with USB and can you see the SD card through it, either as a SCSI device or with a tool like gphoto?
Regards,
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Chris Green -
Chris Walker -
MJ Ray