Re: COMMAND SEQUENCE ERROR when reading from pipe or stdin
On Mon, 21 Feb 2005 13:18:24 +1100, Mitch Davis wrote
> Hello,
>
> I'm trying to use growisofs to write data to a
> blanked DVD-RW. If I point growisofs at an image
> file, everything works properly. But if I pipe in
> the image file via stdin or a named pipe, the
> write fails with the message "COMMAND SEQUENCE ERROR".
Hello,
Thank you to everyone who replied.
James Finnall <james@finnall.net> wrote:
>
> I use the program sdd to write directly to the drive. I have used this
> method a great deal under kernel 2.4 with a kernel patch. But I have only
> tested my own system at this point on 2.6.10 and no kernel patch.
>
> /bin/tar -cz some_files | /usr/local/bin/sdd of=/dev/raw/raw1 obs=32k
>
> Please note that it uses the raw device and sets the output buffer size to
> 32k. The raw device needs to bound the drive to be used like this:
>
> raw /dev/raw/raw1 /dev/dvd_drive_to_use
That's a sweet idea, I'd like to try it. I got sdd 1.52 and compiled
it. The problem is, FC3 no longer has (or needs) the "raw" command:
http://www.edhanced.com/ask-mred/?q=node/view/82
Instead, apps should call open() with the O_DIRECT flag, which
sdd doesn't use. I had a look at the sdd source with a view to
adding a flag to use O_DIRECT, but the prototype for the
getallargs() fn has (literally) 57 arguments. I'm not sure I
want to mess with it.
Jörg, if you're reading this, would you consider a version of
sdd which has an option to cause open() to use the O_DIRECT flag?
An alternative might be for me to apply the following patch to
dd, which adds support for open() with O_DIRECT:
http://marc.theaimsgroup.com/?l=linux-kernel&m=108135935629589
Has anyone tried this?
Things are certainly not going to work with dd as things stand:
[root@homer /]# dd if=/home/050221-sys.tar.gz of=/dev/hdc obs=32k
dd: opening `/dev/hdc': Read-only file system
Bill Davidsen <davidsen@tmr.com> wrote:
>
> Since you are running FC3, you could run the cdrecord
> which comes with the release. I haven't had any problems
> with it. YMMV.
My mileage IS varying. I want to stream to the recorder,
not burn a pre-existing image. Ok, I'll try with an image
first. I guess I have a choice of TAO or SAO (DAO maps to
SAO on this drive).
Let's try TAO:
[root@homer /home/mjd]# cdrecord dev=ATA:1,0,0 driveropts=burnfree -tao -
< /home/050221-sys.tar.gz
Cdrecord-Clone 2.01a27 (i686-pc-linux-gnu) Copyright (C) 1995-2004 Jörg
Schilling
NOTE: this is OSS DVD extensions for cdrtools and thus may have bugs
related to DVD issues that are not present in the original cdrtools. For
more information see http://crashrecovery.org/oss-dvd.html. The original
cdrtools author should not be bothered with problems in this version.
scsidev: 'ATA:1,0,0'
devname: 'ATA'
scsibus: 1 target: 0 lun: 0
Warning: Using badly designed ATAPI via /dev/hd* interface.
Linux sg driver version: 3.5.27
Using libscg version 'schily-0.8'.
cdrecord: Warning: using inofficial libscg transport code version (schily -
Red Hat-scsi-linux-sg.c-1.80-RH '@(#)scsi-linux-sg.c 1.80 04/03/08
Copyright 1997 J. Schilling').
Device type : Removable CD-ROM
Version : 0
Response Format: 2
Capabilities :
Vendor_info : 'TEAC '
Identifikation : 'DV-W50E '
Revision : '1.30'
Device seems to be: Generic mmc2 DVD-R/DVD-RW.
cdrecord: Found DVD media: using cdr_mdvd.
Using generic SCSI-3/mmc DVD-R(W) driver (mmc_mdvd).
Driver flags : SWABAUDIO BURNFREE
Supported modes: PACKET SAO
cdrecord: Drive does not support TAO recording.
cdrecord: Illegal write mode for this drive.
Let's try DAO (which maps to SAO) with an image:
[root@homer /home/mjd]# cdrecord dev=ATA:1,0,0 driveropts=burnfree -dao -
< /home/050221-sys.tar.gz
Cdrecord-Clone 2.01a27 (i686-pc-linux-gnu) Copyright (C) 1995-2004 Jörg
Schilling
NOTE: this is OSS DVD extensions for cdrtools and thus may have bugs
related to DVD issues that are not present in the original cdrtools. For
more information see http://crashrecovery.org/oss-dvd.html. The original
cdrtools author should not be bothered with problems in this version.
scsidev: 'ATA:1,0,0'
devname: 'ATA'
scsibus: 1 target: 0 lun: 0
Warning: Using badly designed ATAPI via /dev/hd* interface.
Linux sg driver version: 3.5.27
Using libscg version 'schily-0.8'.
cdrecord: Warning: using inofficial libscg transport code version (schily -
Red Hat-scsi-linux-sg.c-1.80-RH '@(#)scsi-linux-sg.c 1.80 04/03/08
Copyright 1997 J. Schilling').
Device type : Removable CD-ROM
Version : 0
Response Format: 2
Capabilities :
Vendor_info : 'TEAC '
Identifikation : 'DV-W50E '
Revision : '1.30'
Device seems to be: Generic mmc2 DVD-R/DVD-RW.
cdrecord: Found DVD media: using cdr_mdvd.
Using generic SCSI-3/mmc DVD-R(W) driver (mmc_mdvd).
Driver flags : SWABAUDIO BURNFREE
Supported modes: PACKET SAO
Starting to write CD/DVD at speed 2 in real SAO mode for single session.
Last chance to quit, starting real write 0 seconds. Operation starts.
trackno=0
Turning BURN-Free off
cdrecord: Turning BURN-Free on
cdrecord: WARNING: Drive returns wrong startsec (0) using -150
WARNING: padding up to secsize.
Track 01: Total bytes read/written: 1312469667/1312471040 (640855 sectors).
Let's try the same data, but streamed (cdrecord won't be able to seek):
[root@homer /home/mjd]# cat /home/050221-sys.tar.gz | cdrecord dev=ATA:1,0,0
driveropts=burnfree -dao -
Cdrecord-Clone 2.01a27 (i686-pc-linux-gnu) Copyright (C) 1995-2004 Jörg
Schilling
NOTE: this is OSS DVD extensions for cdrtools and thus may have bugs
related to DVD issues that are not present in the original cdrtools. For
more information see http://crashrecovery.org/oss-dvd.html. The original
cdrtools author should not be bothered with problems in this version.
scsidev: 'ATA:1,0,0'
devname: 'ATA'
scsibus: 1 target: 0 lun: 0
Warning: Using badly designed ATAPI via /dev/hd* interface.
Linux sg driver version: 3.5.27
Using libscg version 'schily-0.8'.
cdrecord: Warning: using inofficial libscg transport code version (schily -
Red Hat-scsi-linux-sg.c-1.80-RH '@(#)scsi-linux-sg.c 1.80 04/03/08
Copyright 1997 J. Schilling').
Device type : Removable CD-ROM
Version : 0
Response Format: 2
Capabilities :
Vendor_info : 'TEAC '
Identifikation : 'DV-W50E '
Revision : '1.30'
Device seems to be: Generic mmc2 DVD-R/DVD-RW.
cdrecord: Found DVD media: using cdr_mdvd.
Using generic SCSI-3/mmc DVD-R(W) driver (mmc_mdvd).
Driver flags : SWABAUDIO BURNFREE
Supported modes: PACKET SAO
cdrecord: Track 1 has unknown length.
cdrecord: Use tsize= option in SAO mode to specify track size.
Obviously I can't specify tsize because I don't know ahead
of time what the size will be. So I have the same problem
as with growisofs: I'm unable to stream data to cdrecord.
Unfortunately nobody has answered my question: Why am I unable
to stream to growisofs? Andy?
(My original post with diagnostics is here:)
http://lists.debian.org/cdwrite/2005/02/msg00047.html
Thank you all.
Mitch.
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