Re: 2.5.34-bk floppy weirdness

Re: 2.5.34-bk floppy weirdness

[Mikael Pettersson]

On Tue, 10 Sep 2002 20:38:47 -0500 (CDT), Thomas Molina wrote:
>The following appeared with the latest bk updated kernel.  It was not 
>present with the 2.5.33 version, nor with a 2.4 kernel version.
>
>I cannot dd to the floppy until either it has been mounted, or until the 
>superuser has dd'd to the floppy.  The following is from a fresh boot:
>
>[tmolina@dad testfloppystable]$ ls
>floppy  floppyimage
>[tmolina@dad testfloppystable]$ ls -l /dev/fd0
>brw-rw----    1 tmolina  floppy     2,   0 Apr 11 09:25 /dev/fd0
>[tmolina@dad testfloppystable]$ ls -l
>total 1448
>drwxr-xr-x    2 tmolina  tmolina      4096 Dec 31  1969 floppy
>-rw-rw-r--    1 tmolina  tmolina   1474560 Sep  1 09:49 floppyimage
>[tmolina@dad testfloppystable]$ dd if=floppyimage of=/dev/fd0
>dd: opening `/dev/fd0': No such device or address
>[tmolina@dad testfloppystable]$ su
>Password:
>[root@dad testfloppystable]# dd if=floppyimage of=/dev/fd0
>2880+0 records in
>2880+0 records out

My 2.5.34 (proper, not bk) doesn't have this misbehaviour.

Are you building the floppy driver as a module and relying
on kmod+modutils to insert it on demand? If so, you may be
seeing the same problem I was when I upgraded my user-space
to RedHat 7.3: dd of=/dev/fd0 as a user won't load floppy.o.
See RedHat bug id 65685 for details.

/Mikael

Re: 2.5.34-bk floppy weirdness

[Thomas Molina]

On Wed, 11 Sep 2002, Mikael Pettersson wrote:

> >dd: opening `/dev/fd0': No such device or address
> >[tmolina@dad testfloppystable]$ su
> >Password:
> >[root@dad testfloppystable]# dd if=floppyimage of=/dev/fd0
> >2880+0 records in
> >2880+0 records out
> 
> My 2.5.34 (proper, not bk) doesn't have this misbehaviour.
> 
> Are you building the floppy driver as a module and relying
> on kmod+modutils to insert it on demand? If so, you may be
> seeing the same problem I was when I upgraded my user-space
> to RedHat 7.3: dd of=/dev/fd0 as a user won't load floppy.o.
> See RedHat bug id 65685 for details.

You are exactly right.  The floppy driver is built as a module.  I'll 
refer to the bugzilla and add a comment if needed.  Since this is a 
RedHat-specific symptom I'll handle it through them.

2.5.34-bk floppy weirdness

[Thomas Molina]

The following appeared with the latest bk updated kernel.  It was not 
present with the 2.5.33 version, nor with a 2.4 kernel version.

I cannot dd to the floppy until either it has been mounted, or until the 
superuser has dd'd to the floppy.  The following is from a fresh boot:

[tmolina@dad testfloppystable]$ ls
floppy  floppyimage
[tmolina@dad testfloppystable]$ ls -l /dev/fd0
brw-rw----    1 tmolina  floppy     2,   0 Apr 11 09:25 /dev/fd0
[tmolina@dad testfloppystable]$ ls -l
total 1448
drwxr-xr-x    2 tmolina  tmolina      4096 Dec 31  1969 floppy
-rw-rw-r--    1 tmolina  tmolina   1474560 Sep  1 09:49 floppyimage
[tmolina@dad testfloppystable]$ dd if=floppyimage of=/dev/fd0
dd: opening `/dev/fd0': No such device or address
[tmolina@dad testfloppystable]$ su
Password:
[root@dad testfloppystable]# dd if=floppyimage of=/dev/fd0
2880+0 records in
2880+0 records out
[root@dad testfloppystable]# exit
exit
[tmolina@dad testfloppystable]$ dd if=floppyimage of=/dev/fd0
2880+0 records in
2880+0 records out
[tmolina@dad testfloppystable]$ ls -l /dev/fd0
brw-rw----    1 tmolina  floppy     2,   0 Apr 11 09:25 /dev/fd0
[tmolina@dad testfloppystable]$

>From a subsequent fresh boot I get:

[tmolina@dad testfloppystable]$ dd if=floppyimage of=/dev/fd0
dd: opening `/dev/fd0': No such device or address
[tmolina@dad testfloppystable]$ mount /dev/fd0
FAT: Using codepage iso8859-1
FAT: Using IO charset iso8859-1
[tmolina@dad testfloppystable]$ ls -l /mnt/floppy
total 1418
-rwxrwxr-x    1 tmolina  tmolina    124623 Sep  1 09:32 current
-rwxrwxr-x    1 tmolina  tmolina       187 Sep  1 09:29 fetchmailrc
-rwxrwxr-x    1 tmolina  tmolina     95508 Sep  1 09:32 kernelstable
-rwxrwxr-x    1 tmolina  tmolina      1221 Sep  1 09:28 lynx_bookmarks.html
-rwxrwxr-x    1 tmolina  tmolina       390 Jun 15 12:12 mirror.defaults
-r-xr-xr-x    1 tmolina  tmolina      4489 Jun 19 20:56 monster.com resume.txt
-rwxrwxr-x    1 tmolina  tmolina     13735 Aug 29 14:37 msgs.txt
-rwxrwxr-x    1 tmolina  tmolina       787 Sep  1 09:28 procmailrc
-r-xr-xr-x    1 tmolina  tmolina     29184 Jun 19 20:56 resume 2000.06.21.doc
-rwxrwxr-x    1 tmolina  tmolina     15360 May 20 06:49 Resume.doc
-rwxrwxr-x    1 tmolina  tmolina    798026 Sep  1 09:31 saved-messages
-rwxrwxr-x    1 tmolina  tmolina      4287 Sep  1 09:26 test.txt
-rwxrwxr-x    1 tmolina  tmolina     37376 Aug 31 07:43 tomresume.doc
-rwxrwxr-x    1 tmolina  tmolina      4068 Aug 31 07:27 tomresume.txt
-rwxrwxr-x    1 tmolina  tmolina     45330 Sep  1 09:29 upgrade.log
-rwxrwxr-x    1 tmolina  tmolina    274292 Sep  1 09:32 valhalla
[tmolina@dad testfloppystable]$ umount /dev/fd0
[tmolina@dad testfloppystable]$ dd if=floppyimage of=/dev/fd0
2880+0 records in
2880+0 records out
[tmolina@dad testfloppystable]$