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Bug 52634 - mount doesn't always show the correct fs type
mount doesn't always show the correct fs type
Status: CLOSED DUPLICATE of bug 52299
Product: Red Hat Public Beta
Classification: Retired
Component: mount (Show other bugs)
i386 Linux
medium Severity medium
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Assigned To: Bernhard Rosenkraenzer
Brian Brock
Depends On:
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Reported: 2001-08-27 10:57 EDT by Stephen Tweedie
Modified: 2007-04-18 12:36 EDT (History)
1 user (show)

See Also:
Fixed In Version:
Doc Type: Bug Fix
Doc Text:
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Clone Of:
Last Closed: 2001-08-28 10:07:31 EDT
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RHEL 7.3 requirements from Atomic Host:
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Description Stephen Tweedie 2001-08-27 10:57:28 EDT
Description of Problem:

Mount usually shows the fstype in /etc/fstab, not the actual fs type from
/proc/mounts, for the root filesystem.

This is a serious problem because there is a common failure mode where
people think they have upgraded to ext3 but haven't built a new initrd, so
the root fs is actually loaded as ext2 despite "mount" claiming that it is
mounted as ext3.

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

How Reproducible:

Steps to Reproduce:
1. Convert to ext3 on root filesystem (with ext3 in /etc/fstab)
2. Boot a kernel without an initrd (so we don't have an ext3 module loaded)
   The kernel loads the root filesystem as ext2, not ext3, as expected.
3. Run "mount" to display mounted filesystems.

Actual Results:
[sct@dax] ~ $ mount
/dev/hdc1 on / type ext3 (rw,usrquota,grpquota)

but in actual fact it is an ext2 filesystem:

[sct@dax] ~ $ cat /proc/mounts 
/dev/root / ext2 rw 0 0

Expected Results:

mount should display what IS mounted, not just what it thinks OUGHT to be

Additional Information:
Comment 1 Bernhard Rosenkraenzer 2001-08-28 10:07:24 EDT
What does your /etc/mtab say?
Comment 2 Bernhard Rosenkraenzer 2001-09-03 07:34:27 EDT

*** This bug has been marked as a duplicate of 52299 ***

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