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 ;-)