This is a USB SD/MMC card reader for direct data transfers to and from memory cards of type SecureDigital (SD) or MMC (not tested, but should work identically) commonly used in digital cameras and PDAs. Works fine with kernel 2.4.20. Once hooked up the reader is recognized as USB mass storage and will be made availabe as a scsi device (/dev/sda if you have no others) - but note that you will get error messages in the system log if there is no card inserted (sda: I/O error: dev 08:00, sector 0). As far as I can tell, you can safely ignore these messages - just plug in a card, then mount it! Don't forget to umount before you take it out or you might lose data. (tested on SuSE8.2) I'll give it a 10, since it's working without any problems (note that this might be very different if you use a kernel < 2.4.20!)
Worked out of the box with SuSE8.2 and kernel 2.4.20-4GB.
The reader is recognized as USB mass storage and will be made availabe as a scsi device (/dev/sda if you have no others). Right after plugging the reader in, I get some error messages in the system log (I think they are related to the fact that the reader is only the interface to the actual "harddrive", the memory card - maybe this will disappear with a later kernel?). As far as I can tell, you can safely ignore these messages (please correct me if you know otherwise!) - just plug in a card, then mount it: an entry for /dev/sda1 might already have been entered into your /etc/fstab by the usb hotplug system, otherwise just add something like:
/dev/sda1 /media/sda1 auto noauto,user,exec 0 0
Don't forget to umount before you take the card out or you might lose data.
Note: I only tested SD cards, since I don't use MMC - but I imagine there shouldn't be any difference. I'll give it a 9 out of 10, because of the error messages, see here for an example:
excerpt from /var/log/messages after plugging in the reader (with a Verbatim 256MB SD card)
Nov 18 12:26:44 kernel: hub.c: new USB device 00:07.2-2, assigned address 106
Nov 18 12:26:44 kernel: WARNING: USB Mass Storage data integrity not assured
Nov 18 12:26:44 kernel: USB Mass Storage device found at 106
Nov 18 12:26:51 kernel: Device not ready. Make sure there is a disc in the drive.
Nov 18 12:26:53 kernel: SCSI device sda: 494080 512-byte hdwr sectors (253 MB)
Nov 18 12:26:53 kernel: usb-uhci.c: interrupt, status 3, frame# 190
Nov 18 12:26:53 kernel: sda: Write Protect is off
Nov 18 12:26:53 kernel: sda: I/O error: dev 08:00, sector 0
Nov 18 12:26:53 kernel: I/O error: dev 08:00, sector 0
Nov 18 12:26:53 kernel: I/O error: dev 08:00, sector 494072
Nov 18 12:26:53 kernel: I/O error: dev 08:00, sector 494072
Nov 18 12:26:53 kernel: I/O error: dev 08:00, sector 0
Nov 18 12:26:53 kernel: I/O error: dev 08:00, sector 0
Nov 18 12:26:53 kernel: unable to read partition table
Nov 18 12:26:53 kernel: I/O error: dev 08:00, sector 0
Nov 18 12:26:54 kernel: SCSI device sda: 494080 512-byte hdwr sectors (253 MB)
Nov 18 12:26:54 kernel: sda: Write Protect is off
Nov 18 12:26:54 kernel: sda: sda1
Nov 18 12:26:55 /etc/hotplug/usb.agent[11529]: Can't ignore signal CHLD, forcing to default.
Would you recommend the product? yes | Price you paid?: None indicated | Rating: 0
Kernel (uname -r):
Distribution:
I plugged in my reader properly for sure, But it keeps saying that I have an I/O device Error. It isn't working on my computer. Can anyone tell me what I can do to fix it?
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