Bug 80368 - False writes to write-protected hard drive
False writes to write-protected hard drive
Status: CLOSED WONTFIX
Product: Red Hat Linux
Classification: Retired
Component: kernel (Show other bugs)
7.2
i386 Linux
medium Severity low
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Assigned To: Arjan van de Ven
Brian Brock
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Depends On:
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Reported: 2002-12-24 23:43 EST by cosmo lee
Modified: 2007-04-18 12:49 EDT (History)
1 user (show)

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Doc Type: Bug Fix
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Last Closed: 2004-09-30 11:40:19 EDT
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Description cosmo lee 2002-12-24 23:43:42 EST
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 11:40:19 EDT
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/

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