Some MMC memory cards do not work while e.g. CFC are just fine
Jukka A. Ukkonen
jau at iki.fi
Sat Apr 23 15:09:52 PDT 2005
I have a USB attached multi slot memory card reader which I
use with FreeBSD-4.11. It has worked just fine with CFC cards
for ages. A while ago I managed to get it work briefly with
the MMC card used in Nokia 9300 mobile phones.
Later when I have tried the same physical MMC card again it
refuses to co-operate, but the CFCs seem to work just fine.
This does not seem to be a problem in the MMC itself because it
still works fine with the phone.
The MMC just no longer works with FreeBSD and multi slot reader.
Is this a known symptom of some sort of a quirk missing in
scsi_da.c or something similar?
When I apply "camcontrol rescan 4:0:2" this gets logged to the
da6 at umass-sim0 bus 0 target 0 lun 2
da6: <Zynet USB Storage-MMC I03A> Removable Direct Access SCSI-0 device
da6: 650KB/s transfers
da6: 122MB (250880 512 byte sectors: 64H 32S/T 122C)
So, the MMC definitely is there, and it has been recognized.
When I try to mount the thing...
mount -p -t msdos /dev/da5s1 /USB/flash
I get this...
(da6:umass-sim0:0:0:2): READ(10). CDB: 28 40 0 0 0 0 0 0 1 0
(da6:umass-sim0:0:0:2): MEDIUM ERROR asc:11,0
(da6:umass-sim0:0:0:2): Unrecovered read error
da6: reading primary partition table: error reading fsbn 0
msdos: /dev/da6s1: Input/output error
WHat should I make of this? Do these symptoms ring a bell?
Are there any hints what to try next?
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/ Jukka A. Ukkonen, Mawit Ltd, Finland
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v Internet: jau(a)iki.fi
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