[135707.415227] usb 2-1.3: new SuperSpeed Gen 1 USB device number 5 using xhci_hcd
[135707.435975] usb 2-1.3: New USB device found, idVendor=0930, idProduct=6545, bcdDevice= 1.10
[135707.435979] usb 2-1.3: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[135707.435981] usb 2-1.3: Product: USB FLASH DRIVE
[135707.435982] usb 2-1.3: Manufacturer: TOSHIBA
[135707.435984] usb 2-1.3: SerialNumber: C03FD5FBA9E2E16090021510
[135707.439253] usb-storage 2-1.3:1.0: USB Mass Storage device detected
[135707.444685] scsi host4: usb-storage 2-1.3:1.0
[135708.471647] scsi 4:0:0:0: Direct-Access     TOSHIBA  USB FLASH DRIVE  PMAP PQ: 0 ANSI: 6
[135708.472850] sd 4:0:0:0: Attached scsi generic sg2 type 0
[135708.473057] sd 4:0:0:0: [sdc] 60506112 512-byte logical blocks: (31.0 GB/28.9 GiB)
[135708.473218] sd 4:0:0:0: [sdc] Write Protect is off
[135708.473220] sd 4:0:0:0: [sdc] Mode Sense: 45 00 00 00
[135708.473376] sd 4:0:0:0: [sdc] Write cache: disabled, read cache: enabled, doesn't support DPO or FUA
[135708.566377]  sdc: sdc1 sdc2
[135708.567223] sd 4:0:0:0: [sdc] Attached SCSI removable disk
akem@akem-HP:~$ mount /dev/sdc1 /mnt/ext/
mount: only root can do that
akem@akem-HP:~$ sudo mount /dev/sdc1 /mnt/ext/
[sudo] password for akem:
mount: /mnt/ext: WARNING: device write-protected, mounted read-only.
akem@akem-HP:~$ sudo umount /mnt/ext
akem@akem-HP:~$ sudo hdparm -r0 /dev/sdc

/dev/sdc:
 setting readonly to 0 (off)
 readonly      =  0 (off)
akem@akem-HP:~$ sudo mount /dev/sdc1 /mnt/ext/
mount: /mnt/ext: WARNING: device write-protected, mounted read-only.
akem@akem-HP:~$ sudo mount -o remount,rw /mnt/ext/
mount: /mnt/ext: cannot remount /dev/sdc1 read-write, is write-protected.
akem@akem-HP:~$ sudo hdparm -r0 /dev/sdc

/dev/sdc:
 setting readonly to 0 (off)
 readonly      =  0 (off)
akem@akem-HP:~$ sudo hdparm -r0 /dev/sdc1

/dev/sdc1:
 setting readonly to 0 (off)
 readonly      =  0 (off)
akem@akem-HP:~$ sudo mount -o remount,rw /mnt/ext/
mount: /mnt/ext: cannot remount /dev/sdc1 read-write, is write-protected.
akem@akem-HP:~$