[Bug 1253914] Re: NTFS USB drive mounted read-only

Ken Sharp 1253914 at bugs.launchpad.net
Wed Nov 27 18:43:13 UTC 2013


This has convinced me that it could be a hardware fault:
http://askubuntu.com/a/105332/170177

I'll reopen if I can get any intelligence out of Verbatim.

** Changed in: ntfs-3g (Ubuntu)
       Status: New => Incomplete

-- 
You received this bug notification because you are a member of Ubuntu
Foundations Bugs, which is subscribed to ntfs-3g in Ubuntu.
https://bugs.launchpad.net/bugs/1253914

Title:
  NTFS USB drive mounted read-only

Status in “ntfs-3g” package in Ubuntu:
  Incomplete

Bug description:
  I have a USB drive formatted to NTFS as it is used in a Blu-ray player
  which does not (appear to) support ext2+ and FAT cannot handle large
  files.

  I have never had any problems with this but recently I had to do a
  fresh install of Precise and now it mounts read-only by default.

  Nov 22 07:10:07 aspire kernel: [ 5426.445772] usb 1-3: new high-speed USB device number 5 using ehci-pci
  Nov 22 07:10:07 aspire kernel: [ 5426.585758] usb 1-3: New USB device found, idVendor=0bda, idProduct=0119
  Nov 22 07:10:07 aspire kernel: [ 5426.585771] usb 1-3: New USB device strings: Mfr=1, Product=2, SerialNumber=3
  Nov 22 07:10:07 aspire kernel: [ 5426.585778] usb 1-3: Product: USB2.0-CRW
  Nov 22 07:10:07 aspire kernel: [ 5426.585785] usb 1-3: Manufacturer: Generic
  Nov 22 07:10:07 aspire kernel: [ 5426.585790] usb 1-3: SerialNumber: 20090815198100000
  Nov 22 07:10:07 aspire kernel: [ 5426.588671] scsi3 : usb-storage 1-3:1.0
  Nov 22 07:10:07 aspire mtp-probe: checking bus 1, device 5: "/sys/devices/pci0000:00/0000:00:12.2/usb1/1-3"
  Nov 22 07:10:07 aspire mtp-probe: bus: 1, device: 5 was not an MTP device
  Nov 22 07:10:08 aspire kernel: [ 5427.586198] scsi 3:0:0:0: Direct-Access     Generic- SD/MMC           1.00 PQ: 0 ANSI: 0 CCS
  Nov 22 07:10:08 aspire kernel: [ 5427.588006] sd 3:0:0:0: Attached scsi generic sg2 type 0
  Nov 22 07:10:09 aspire kernel: [ 5428.257181] sd 3:0:0:0: [sdb] 31074304 512-byte logical blocks: (15.9 GB/14.8 GiB)
  Nov 22 07:10:09 aspire kernel: [ 5428.258490] sd 3:0:0:0: [sdb] Write Protect is on
  Nov 22 07:10:09 aspire kernel: [ 5428.258505] sd 3:0:0:0: [sdb] Mode Sense: 03 00 80 00
  Nov 22 07:10:09 aspire kernel: [ 5428.260678] sd 3:0:0:0: [sdb] No Caching mode page found
  Nov 22 07:10:09 aspire kernel: [ 5428.260691] sd 3:0:0:0: [sdb] Assuming drive cache: write through
  Nov 22 07:10:09 aspire kernel: [ 5428.266289] sd 3:0:0:0: [sdb] No Caching mode page found
  Nov 22 07:10:09 aspire kernel: [ 5428.266302] sd 3:0:0:0: [sdb] Assuming drive cache: write through
  Nov 22 07:10:09 aspire kernel: [ 5428.268310]  sdb: sdb1
  Nov 22 07:10:09 aspire kernel: [ 5428.273120] sd 3:0:0:0: [sdb] No Caching mode page found
  Nov 22 07:10:09 aspire kernel: [ 5428.273133] sd 3:0:0:0: [sdb] Assuming drive cache: write through
  Nov 22 07:10:09 aspire kernel: [ 5428.273143] sd 3:0:0:0: [sdb] Attached SCSI removable disk
  Nov 22 07:10:09 aspire ntfs-3g[5059]: Version 2012.1.15AR.1 external FUSE 28
  Nov 22 07:10:09 aspire ntfs-3g[5059]: Mounted /dev/sdb1 (Read-Only, label "Blu-ray", NTFS 3.1)
  Nov 22 07:10:09 aspire ntfs-3g[5059]: Cmdline options: rw,nosuid,nodev,uhelper=udisks,uid=1000,gid=1000,dmask=0077,fmask=0177
  Nov 22 07:10:09 aspire ntfs-3g[5059]: Mount options: rw,nosuid,nodev,uhelper=udisks,allow_other,nonempty,relatime,ro,default_permissions,fsname=/dev/sdb1,blkdev,blksize=4096
  Nov 22 07:10:09 aspire ntfs-3g[5059]: Global ownership and permissions enforced, configuration type 7

  I do not understand the "Write Protect is on" statement as there is no
  reason why it should be. A file was copied to this drive, then viewed
  on the Blu-ray player, then the drive has been reinserted into the
  same computer with the intention to delete the file and copy a new
  one. If write protection has been enabled then I have not asked for
  this.

  Further on you can see that rw is passed, but then so is ro as mount
  options, probably because of this write protection.

  The end-user experience being that I have inserted a USB drive and
  cannot write to it. A non-tech-savvy user would simply see this as
  "broken".

  $ sudo fdisk -l
  Disk /dev/sdb: 15.9 GB, 15910043648 bytes
  255 heads, 63 sectors/track, 1934 cylinders, total 31074304 sectors
  Units = sectors of 1 * 512 = 512 bytes
  Sector size (logical/physical): 512 bytes / 512 bytes
  I/O size (minimum/optimal): 512 bytes / 512 bytes
  Disk identifier: 0x000d286f

     Device Boot      Start         End      Blocks   Id  System
  /dev/sdb1            2048    31074303    15536128    7  HPFS/NTFS/exFAT

  I have tried hdparm -r0 /dev/sdb which claims to disable read-only but
  mounting the partition again makes no difference, and syslog still
  claims the drive is write protected.

  $ sudo hdparm -r /dev/sdb

  /dev/sdb:
   readonly      =  0 (off)

  $ sudo mount -o remount,rw /dev/sdb1
  mount: cannot remount block device /dev/sdb1 read-write, is write-protected

  I have no idea how to resolve this, and it would appear I am not alone:
  http://askubuntu.com/questions/373136/micro-sd-card-write-protected-fat32

  Using another FS isn't an option as most of the files are >8GB but
  then the drive is read-only anyway!

  ProblemType: Bug
  DistroRelease: Ubuntu 12.04
  Package: ntfs-3g 1:2012.1.15AR.1-1ubuntu1.2
  ProcVersionSignature: Ubuntu 3.8.0-33.48~precise1-generic 3.8.13.11
  Uname: Linux 3.8.0-33-generic x86_64
  NonfreeKernelModules: wl
  ApportVersion: 2.0.1-0ubuntu17.6
  Architecture: amd64
  Date: Fri Nov 22 07:15:44 2013
  InstallationMedia: Ubuntu 12.04.3 LTS "Precise Pangolin" - Release amd64 (20130820.1)
  MarkForUpload: True
  ProcEnviron:
   LANGUAGE=en_GB:en
   TERM=xterm
   PATH=(custom, no user)
   LANG=en_GB.UTF-8
   SHELL=/bin/bash
  SourcePackage: ntfs-3g
  UpgradeStatus: No upgrade log present (probably fresh install)

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/ntfs-3g/+bug/1253914/+subscriptions



More information about the foundations-bugs mailing list