Help answer threads with 0 replies.
Go Back > Forums > Linux Forums > Linux - Distributions > Slackware
User Name
Slackware This Forum is for the discussion of Slackware Linux.


  Search this Thread
Old 07-02-2004, 04:46 PM   #1
Registered: Mar 2004
Posts: 53

Rep: Reputation: 15
DMESG: FAT: bogus logical sector size 0

I have just installed slack 10 and after running dmesg i get this message

FAT: bogus logical sector size 0
UMSDOS: msdos_read_super failed, mount aborted.
FAT: bogus logical sector size 0
FAT: bogus logical sector size 0

I never got this message when i was using 9.1

Anyone has any ideas about this? I have seen that some other people have similiar problems but till now haven't found any good explanation about it or how to fix it.
Old 07-02-2004, 05:40 PM   #2
Registered: Jun 2003
Location: Canada
Distribution: Slackware (current); Gentoo (newbie)
Posts: 142

Rep: Reputation: 15
Please post the contents of /etc/fstab and the results of 'fdisk -l' (lower-case L for list).

Is this error triggered by a zip disk or a fat partition on your hard drive?

I've noticed this error when trying to access access improperly-formatted zip disks. Not sure if it popped up in dmesg, but whenever I tried to mount it, I could swear that was the same error.

Old 07-02-2004, 05:47 PM   #3
Senior Member
Registered: Nov 2002
Location: Stockton, CA
Distribution: Slackware 11 - kernel - Dropline Gnome 2.16.2
Posts: 1,132

Rep: Reputation: 50
I get that same message on my old pentium 100mhz. It doesn't have any FAT partitions. I don't get the message on my main box, which is a dual boot with Windows. I figured that it must have something to do with not having a fat partition. I've never had any problems besides the error message, though.
Old 07-02-2004, 06:33 PM   #4
Senior Member
Registered: Jul 2003
Location: So. Cal.
Distribution: Slack 11
Posts: 1,737

Rep: Reputation: 46
I get the same thing on boot, Ive always just ignored it. I had it with 9.1 also.
Old 07-02-2004, 07:00 PM   #5
Registered: Dec 2003
Location: USA (Pacific coast)
Distribution: Vector 5.8-SOHO, FreeBSD 6.2
Posts: 513

Rep: Reputation: 34
I get the same msg on Slack 9.1, but never noticed any problems...............I don't have any FAT partitions and recently removed my Zip drive and replaced it with new hdd and noticed no change in the boot msg...........

PS: Found this bit of info which gives an explanation.......UMSDOS and FAT error message at boot...........

Last edited by thegeekster; 07-02-2004 at 07:14 PM.
Old 07-03-2004, 05:33 AM   #6
Amigo developer
Registered: Dec 2003
Location: Germany
Distribution: Slackware
Posts: 4,890

Rep: Reputation: 569Reputation: 569Reputation: 569Reputation: 569Reputation: 569Reputation: 569
What's happening is this: Since umsdosfs support is compiled into the kernel(not as a module), when the kernel finishes loading and goes to look for the / mount it first checks for a FAT partition with a folder called linux, with a file called --linux-.--- . If it finds that it will try to mount the file system inside that folder.
Since your system is not umsdos, then it reports the failure to find a 'pseudo-root'.

Also, if you try to mount a partition without specifying the fs type, linux will go through the list of filesystems in /proc/filesystems, and try to mount using each fs type until it is successful. VFAT comes before the linux fs types, so you may get similar errors if you mount without giving fs type or have an 'auto' entry in fs type in fstab.
You can compile a new kernel with no umsdos support (or compiled as a module) to eliminate the 'error' in the kernel messages.

the word 'error' in the kernel messages shouldn't always be taken too seriously.
it's just that the kernel is not too verbose. if the system boots succesfully, most errors can be safely ignored.


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is Off
HTML code is Off

Similar Threads
Thread Thread Starter Forum Replies Last Post
FAT16 and "bogus logical sector size 64543" shuuhen Debian 4 10-21-2005 04:22 PM
Bogus logical sector Jeebizz Slackware 4 01-07-2005 05:57 PM
Bogus packet displayed in dmesg zulfilee Linux - Networking 0 06-23-2004 08:52 AM
FAT: bogus logical sector size 0 dzt Linux - General 3 10-22-2003 08:10 PM
bogus logical sector 64543. mount help DigiCrime Linux - Hardware 4 12-20-2002 07:43 AM > Forums > Linux Forums > Linux - Distributions > Slackware

All times are GMT -5. The time now is 09:43 AM.

Main Menu
Write for LQ is looking for people interested in writing Editorials, Articles, Reviews, and more. If you'd like to contribute content, let us know.
Main Menu
RSS1  Latest Threads
RSS1  LQ News
Twitter: @linuxquestions
Facebook: linuxquestions Google+: linuxquestions
Open Source Consulting | Domain Registration