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I am new at linux and currently I have a problem with my USB thumbdrive (can't access it either in windows - no volumes are shown).

cat /proc/scsi/scsi shows the following:

 Host: scsi8 Channel: 00 Id: 00 Lun: 00
  Vendor:          Model: USB MEMORY BAR   Rev: 1000
  Type:   Direct-Access                    ANSI  SCSI revision: 00

dmesg shows the usb drive:

[ 1422.720016] usb 2-7: new high-speed USB device number 4 using ehci_hcd
[ 1425.004881] scsi8 : usb-storage 2-7:1.0
[ 1426.005127] scsi 8:0:0:0: Direct-Access              USB MEMORY BAR   1000 PQ: 0 ANSI: 0 CCS
[ 1426.005734] sd 8:0:0:0: Attached scsi generic sg4 type 0
[ 1426.008739] sd 8:0:0:0: [sdd] Attached SCSI removable disk

but manually mounting was not successful:

 sudo mount -t ntfs /dev/sdd /mnt/usb
 Failed to mount '/dev/sdd': No medium found

Could anyone please help me?

Thank you in advance!

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The partition you wish to mount most probably is /dev/sdd1 (provided the device actually contains a mountable partition).

You can investigate the situation using sudo fdisk -l /dev/sdd

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Hello, it tried it but it was not successful - probably the volume is damaged? In windows disk management I cannot see any volume. Is there a possibility to format the data structure of the thumbrdrive again? – patrick. Jul 3 '12 at 21:39
Could you update the output of sudo fdisk -l /dev/sdd to your question? With fdisk you can create partitions and with mkfs the filesystem. – Jari Laamanen Jul 3 '12 at 22:40
the output of sudo fdisk -l /dev/sdd is empty. Any idea why? sudo fdisk -l shows my internal HDDs correctly, but not my usb thumbdrive. – patrick. Jul 3 '12 at 23:08
Weird. Looks like the /dev/sdd is not there afterall. Does ls -l /dev/sdd* list the usb drive? – Jari Laamanen Jul 3 '12 at 23:24
Unfortunately not.. the weird about that issue is, that a few minutes ago I copied files to the (new! (2-3 weeks old) stick successfully. Then the status (of the usb thumbdrive) suddenly changed to "device not ready" and since then it was not recognized any more (neither windows nor linux). Because of no visible volumes I cannot re-format the stick. – patrick. Jul 4 '12 at 4:59

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