Bug 80368

Summary: False writes to write-protected hard drive
Product: [Retired] Red Hat Linux Reporter: cosmo lee <cosmolee>
Component: kernelAssignee: Arjan van de Ven <arjanv>
Status: CLOSED WONTFIX QA Contact: Brian Brock <bbrock>
Severity: low Docs Contact:
Priority: medium    
Version: 7.2CC: sct
Target Milestone: ---   
Target Release: ---   
Hardware: i386   
OS: Linux   
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Fixed In Version: Doc Type: Bug Fix
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Clone Of: Environment:
Last Closed: 2004-09-30 15:40:19 UTC Type: ---
Regression: --- Mount Type: ---
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Description cosmo lee 2002-12-25 04:43:42 UTC
From Bugzilla Helper:
User-Agent: Mozilla/5.0 (Windows; U; Win98; en-US; rv:1.2) Gecko/20021126

Description of problem:
Linux does not detect that it is writing to a write-protected hard drive.  

I can perform "write" operations to a write-protected hard drive and NO errors
are flagged.  Seagate ST34371W w/ Adaptec 2930 scsi controller.  RH 7.2

Below is a clip from some usenet posts:

What was really odd was that I could mount the drive, delete directories and
`ls` would show them as gone.  Eeverything looks normal.  But the next time I
mount the drive, the directories would be there again!  This is the kind of
thing that would have people believe in ghosts.

I remembered that I've seen drives with a pin setting for "write-protect".  I
pulled the drive out, and sure enough *the drive was write-protected*!

What's very curious is the fact that none of the write operations to the drive
resulted in an error.  Neither `fdisk`, `rm`, nor `dd` writes ever resulted in
an error.  Seems like a write to a  write-protected hard drive, like to a floppy
disk, should result in an error!  Interestingly, when I tried to use a Win98
version of `fdisk`, it responded with an error message that it couldn't read the
drive data, and exited.

Version-Release number of selected component (if applicable):


How reproducible:
Always

Steps to Reproduce:
1. mount a drive with write-protection turned on
2. attempt write operations on the drive, e.g., delete a directory
3. unmount drive
4. re-mount drive - Notice that none of the operations took...
    

Expected Results:  OS would have responded that the media cannot be written to.

Additional info:

I don't know if this is, in fact, a bug.  Not all manufacturers have a
"write-protect" feature, but I have noticed it on Seagate drives.  I don't know
if the drive makes any indication to the OS that it is write-protected so that
this could be detected.

Low-priority.  No data is lost due to this.  You just get confused for a little
while...

Comment 1 Bugzilla owner 2004-09-30 15:40:19 UTC
Thanks for the bug report. However, Red Hat no longer maintains this version of
the product. Please upgrade to the latest version and open a new bug if the problem
persists.

The Fedora Legacy project (http://fedoralegacy.org/) maintains some older releases, 
and if you believe this bug is interesting to them, please report the problem in
the bug tracker at: http://bugzilla.fedora.us/