From: Eric Sandeen <sandeen@redhat.com>
To: Andreas Dilger <adilger@dilger.ca>
Cc: Prashant Shah <pshah.mumbai@gmail.com>, linux-ext4@vger.kernel.org
Subject: Re: debuge2fs not displaying /dev folder
Date: Tue, 15 Jan 2013 12:00:31 -0600 [thread overview]
Message-ID: <50F5993F.5020606@redhat.com> (raw)
In-Reply-To: <CF3C02F1-C284-4E7F-9921-C6DB21A33EE5@dilger.ca>
On 1/15/13 11:43 AM, Andreas Dilger wrote:
>
> On 2013-01-14, at 11:01 PM, Prashant Shah wrote:
>> When using debuge2fs on a ext3 partition the /dev partition does not
>> show any entries at all. While running it on a ext4 partition only
>> part of entries are shown for /dev.
>>
>> Below is the list of files and folder within /dev folder residing on
>> a ext4 partition. Using "debugfs" shows around 92 entries while "ls"
>> shows around 217 entries. A block level dump also shows the same
>> folders as "debugfs".
>
> The first and most important question is whether "/dev" is a real
> filesystem, or if it is a virtual (e.g. "tmpfs" type) filesystem
> on your machine?
was going to say the same thing; try
# mount | grep "on /dev"
>> --------------------- debugfs --------------------
>> 3014659 (12) . 2 (12) .. 3014663 (12) fd 3014664 (16) mapper
>> 3014665 (12) pts 3014666 (12) shm 3014667 (16) agpgart
>>
>>
>> --------- from ls -----------
>> autofs ecryptfs loop6 pts random sr0
>> tty2 tty35 tty50 tty9 ttyS22 uinput vcsa2
>> block fb0 loop7 ram0 rfkill stderr
>
> It would be useful to show "ls -li" information for some of the
> entries that appear via debugfs (e.g. "fd", "pts", and "shm" above),
> and also some of the entries that do not appear in debugfs.
Yep, I'm guessing you are seeing some installer-created devices in the root fs's
/dev but that something has been mounted over the top of it.
-Eric
> Cheers, Andreas
next prev parent reply other threads:[~2013-01-15 18:43 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <CAD6i1f+GzTqewnV=2OefPTGT8YFzNo6+zmoPvxuJXMb9r0ABng@mail.gmail.com>
2013-01-15 6:01 ` debuge2fs not displaying /dev folder Prashant Shah
2013-01-15 17:43 ` Andreas Dilger
2013-01-15 18:00 ` Eric Sandeen [this message]
2013-01-15 18:05 ` Prashant Shah
2013-01-15 20:14 ` Theodore Ts'o
2013-01-16 15:46 ` Prashant Shah
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