Bug 104544 - Unable to mount NTFS-formatted filesystem when device is set to read-only (blockdev --setro)
Summary: Unable to mount NTFS-formatted filesystem when device is set to read-only (bl...
Status: NEW
Alias: None
Product: udisks
Classification: Unclassified
Component: operations (show other bugs)
Version: unspecified
Hardware: x86-64 (AMD64) Linux (All)
: medium normal
Assignee: Martin Pitt
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Reported: 2018-01-09 03:04 UTC by Mike
Modified: 2018-01-09 03:04 UTC (History)
0 users

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Description Mike 2018-01-09 03:04:41 UTC 
Problem:

1.  Insert USB drive (let's say it is detected as /dev/sdb with 1 partition)
2.  If automounted, unmount (sudo umount /dev/sdb1)
3.  sudo blockdev --setro /dev/sdb1
4.  If filesystem in /dev/sdb1 is NTFS, mount will fail with permission denied error -- it seems that the mount helper is not passing the ro mount flag.

If filesystem in /dev/sdb1 is vfat/exfat or ext2/3/4, it will be mounted with ro option.  I have not tested any other filesystem.


I encountered this in:

  Ubuntu 17.10 with udisks2 2.6.5
  Debian 9 (Jessie) with udisks 2.1.x
  Debian 10 (Buster) with udisks 2.7.5

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