Re: [2.6.20-rc6] pktcdvd doesn't work

Re: [2.6.20-rc6] pktcdvd doesn't work

[Luca Tettamanti]

Hi Jeff, linux-ide,
I'm having troubles with libata and UDF on RW media. See below.

Il Tue, Jan 30, 2007 at 09:42:34PM +0100, Jan Engelhardt ha scritto: 
> On Jan 30 2007 21:36, Luca Tettamanti wrote:
> >Il Tue, Jan 30, 2007 at 09:02:20PM +0100, Jan Engelhardt ha scritto: 
> >> 
> >> On Jan 30 2007 20:53, Luca Tettamanti wrote:
> >> >Hi,
> >> >pktcdvd on kernel 2.6.20-rc6 is not working as expected. Any file that
> >> 
> >> Did it work previously?
> >
> >Yup, It used to work but since I rarely use it I don't remember which
> >kernel version worked for me.
> 
> Hm, maybe you can take a guess.

I can bisect pktcdvd.c if necessary, but it seems that it's innocent.
 
> >> >is written to the device is lost after umount.
> >> >I rarely use pktcdvd but at some point it used to work on my system.
> >> >
> >> >This is what I'm doing:
> >> >
> >> >root@dreamland:/tmp# cdrwtool -d /dev/scd0 -q
> >> >scsi 8:0:0:0: CD-ROM            HL-DT-ST DVDRAM GSA-4167B DL13 PQ: 0 ANSI: 5
> >> 
> >> In case you are using ide-scsi: try without.
> >
> >It's libata jmicron driver. Shall I try the "old" PATA driver on the
> >next reboot?
> 
> If you have lots of CDRs/DVDRs to spare (or a CDRW/DVDRW), every test is
> welcome.

With the legacy IDE driver it works fine.
The unit is DVD-RAM capable so the firmware should handle random writes
fine; I've tried mounting /dev/scd0 rw *without* pktcdvd and I still
lose files. So I guess it has something to do with libata.

So to recap, after formatting the disk with UDF:

* libata
  - mount with pktcdvd: all files are lost upon umount
  - mount scd0 w/out pktcdvd: all files are lost upon umount
  - write the disk with cdrecord: OK

  pktcdvd reports wrong capacity:
  
  pktcdvd: Fixed packets, 32 blocks, Mode-2 disc
  pktcdvd: Max. media speed: 4
  pktcdvd: write speed 4x
  pktcdvd: 0kB available on disc
  UDF-fs INFO UDF 0.9.8.1 (2004/29/09) Mounting volume 'LinuxUDF', timestamp 2007/01/30 18:18 (103c)

* legacy IDE driver
  - mount with pktcdvd: OK
  - mount hda w/out pktcdvd: corrupts FS (duh)
  - write the disk with cdrecord: OK

  pktcdvd reports correct capacity:
  
  pktcdvd: writer pktcdvd0 mapped to hda
  pktcdvd: Fixed packets, 32 blocks, Mode-2 disc
  pktcdvd: Max. media speed: 4
  pktcdvd: write speed 4x
  pktcdvd: 551232kB available on disc
  UDF-fs INFO UDF 0.9.8.1 (2004/29/09) Mounting volume 'LinuxUDF', timestamp 2007/01/30 22:19 (103c)

The HW is a JMicron controller:
02:00.0 IDE interface: JMicron Technologies, Inc. JMicron 20360/20363 AHCI Controller (rev 02)
02:00.1 IDE interface: JMicron Technologies, Inc. JMicron 20360/20363 AHCI Controller (rev 02)

(one of the 2 has PATA ports)

driven either by libata (CONFIG_PATA_JMICRON):

PCI: Enabling device 0000:02:00.1 (0000 -> 0001)
ACPI: PCI Interrupt 0000:02:00.1[B] -> GSI 17 (level, low) -> IRQ 19
PCI: Setting latency timer of device 0000:02:00.1 to 64
ata9: PATA max UDMA/100 cmd 0xAC00 ctl 0xA882 bmdma 0xA400 irq 19
ata10: PATA max UDMA/100 cmd 0xA800 ctl 0xA482 bmdma 0xA408 irq 19
scsi8 : pata_jmicron
ata9.00: ATAPI, max UDMA/33
ata9.01: ATAPI, max UDMA/33
ata9.00: configured for UDMA/33
ata9.01: configured for UDMA/33
scsi9 : pata_jmicron
ATA: abnormal status 0x7F on port 0xA807
scsi 8:0:0:0: CD-ROM            HL-DT-ST DVDRAM GSA-4167B DL13 PQ: 0 ANSI: 5
sr0: scsi3-mmc drive: 48x/48x writer dvd-ram cd/rw xa/form2 cdda tray
Uniform CD-ROM driver Revision: 3.20
sr 8:0:0:0: Attached scsi CD-ROM sr0
sr 8:0:0:0: Attached scsi generic sg1 type 5
scsi 8:0:1:0: CD-ROM            WAITEC   ALADAR/1         B1.5 PQ: 0 ANSI: 5
sr1: scsi3-mmc drive: 16x/40x writer cd/rw xa/form2 cdda tray
sr 8:0:1:0: Attached scsi CD-ROM sr1
sr 8:0:1:0: Attached scsi generic sg2 type 5

or by the legacy driver (CONFIG_BLK_DEV_JMICRON):

Uniform Multi-Platform E-IDE driver Revision: 7.00alpha2
ide: Assuming 33MHz system bus speed for PIO modes; override with idebus=xx
JMB361: IDE controller at PCI slot 0000:02:00.1
PCI: Enabling device 0000:02:00.1 (0000 -> 0001)
ACPI: PCI Interrupt 0000:02:00.1[B] -> GSI 17 (level, low) -> IRQ 18
JMB361: chipset revision 2
JMB361: 100% native mode on irq 18
PCI: Setting latency timer of device 0000:02:00.1 to 64
    ide0: BM-DMA at 0xa400-0xa407, BIOS settings: hda:pio, hdb:pio
    ide1: BM-DMA at 0xa408-0xa40f, BIOS settings: hdc:pio, hdd:pio
Probing IDE interface ide0...
hda: HL-DT-ST DVDRAM GSA-4167B, ATAPI CD/DVD-ROM drive
hdb: WAITEC ALADAR/1, ATAPI CD/DVD-ROM drive
ide0 at 0xac00-0xac07,0xa882 on irq 18
Probing IDE interface ide1...
JMB361: IDE controller at PCI slot 0000:02:00.0
PCI: Device 0000:02:00.0 not available because of resource collisions
ACPI: PCI Interrupt 0000:02:00.0[A] -> GSI 16 (level, low) -> IRQ 16
JMB361: BIOS configuration fixed.
JMB361: chipset revision 2
JMB361: 100% native mode on irq 16
JMB361: dma_base is invalid
ide2: JMB361 Bus-Master DMA disabled (BIOS)
JMB361: dma_base is invalid
ide3: JMB361 Bus-Master DMA disabled (BIOS)
Probing IDE interface ide2...
Probing IDE interface ide3...
ALI15X3: IDE controller at PCI slot 0000:05:02.1
ACPI: PCI Interrupt 0000:05:02.1[A] -> GSI 23 (level, low) -> IRQ 19
ALI15X3: chipset revision 198
ALI15X3: 100% native mode on irq 19
ALI15X3: too many IDE interfaces, no room in table
ALI15X3: too many IDE interfaces, no room in table
(hum, must increase MAX_HWIF)
ALI15X3: neither IDE port enabled (BIOS)
hda: ATAPI 40X DVD-ROM DVD-R-RAM CD-R/RW drive, 2048kB Cache, UDMA(33)
Uniform CD-ROM driver Revision: 3.20
hdb: ATAPI 40X CD-ROM CD-R/RW drive, 8192kB Cache, UDMA(33)


Luca
-- 
Not an editor command: Wq

Re: [2.6.20-rc6] pktcdvd doesn't work

[Jeff Garzik]

Luca Tettamanti wrote:
> Hi Jeff, linux-ide,
> I'm having troubles with libata and UDF on RW media. See below.
> 
> Il Tue, Jan 30, 2007 at 09:42:34PM +0100, Jan Engelhardt ha scritto: 
>> On Jan 30 2007 21:36, Luca Tettamanti wrote:
>>> Il Tue, Jan 30, 2007 at 09:02:20PM +0100, Jan Engelhardt ha scritto: 
>>>> On Jan 30 2007 20:53, Luca Tettamanti wrote:
>>>>> Hi,
>>>>> pktcdvd on kernel 2.6.20-rc6 is not working as expected. Any file that
>>>> Did it work previously?
>>> Yup, It used to work but since I rarely use it I don't remember which
>>> kernel version worked for me.
>> Hm, maybe you can take a guess.
> 
> I can bisect pktcdvd.c if necessary, but it seems that it's innocent.
>  
>>>>> is written to the device is lost after umount.
>>>>> I rarely use pktcdvd but at some point it used to work on my system.
>>>>>
>>>>> This is what I'm doing:
>>>>>
>>>>> root@dreamland:/tmp# cdrwtool -d /dev/scd0 -q
>>>>> scsi 8:0:0:0: CD-ROM            HL-DT-ST DVDRAM GSA-4167B DL13 PQ: 0 ANSI: 5
>>>> In case you are using ide-scsi: try without.
>>> It's libata jmicron driver. Shall I try the "old" PATA driver on the
>>> next reboot?
>> If you have lots of CDRs/DVDRs to spare (or a CDRW/DVDRW), every test is
>> welcome.
> 
> With the legacy IDE driver it works fine.
> The unit is DVD-RAM capable so the firmware should handle random writes
> fine; I've tried mounting /dev/scd0 rw *without* pktcdvd and I still
> lose files. So I guess it has something to do with libata.
> 
> So to recap, after formatting the disk with UDF:
> 
> * libata
>   - mount with pktcdvd: all files are lost upon umount
>   - mount scd0 w/out pktcdvd: all files are lost upon umount
>   - write the disk with cdrecord: OK
> 
>   pktcdvd reports wrong capacity:
>   
>   pktcdvd: Fixed packets, 32 blocks, Mode-2 disc
>   pktcdvd: Max. media speed: 4
>   pktcdvd: write speed 4x
>   pktcdvd: 0kB available on disc
>   UDF-fs INFO UDF 0.9.8.1 (2004/29/09) Mounting volume 'LinuxUDF', timestamp 2007/01/30 18:18 (103c)
> 
> * legacy IDE driver
>   - mount with pktcdvd: OK
>   - mount hda w/out pktcdvd: corrupts FS (duh)
>   - write the disk with cdrecord: OK
> 
>   pktcdvd reports correct capacity:
>   
>   pktcdvd: writer pktcdvd0 mapped to hda
>   pktcdvd: Fixed packets, 32 blocks, Mode-2 disc
>   pktcdvd: Max. media speed: 4
>   pktcdvd: write speed 4x
>   pktcdvd: 551232kB available on disc
>   UDF-fs INFO UDF 0.9.8.1 (2004/29/09) Mounting volume 'LinuxUDF', timestamp 2007/01/30 22:19 (103c)
> 
> The HW is a JMicron controller:
> 02:00.0 IDE interface: JMicron Technologies, Inc. JMicron 20360/20363 AHCI Controller (rev 02)
> 02:00.1 IDE interface: JMicron Technologies, Inc. JMicron 20360/20363 AHCI Controller (rev 02)

hmmm, definitely interesting behavior.

Would you mind putting this info into a bugzilla.kernel.org report, so 
that it is not lost?  This bug will likely go into a heavy ATAPI 
debugging session that is coming in a few weeks, but not immediately :/

	Jeff

Re: [2.6.20-rc6] pktcdvd doesn't work

[Fabio Comolli]

Hi all.
I don't know if this report can be useful, but this problem does not
show up in my setup.

I tried multiple times to copy 10MB files (unmounting and remounting
every time) and verified with md5sum the results and everything is
correct.

Details:

* kernel version: 2.6.20-rc6-g93544047
* driver: ata_piix (only a PATA hard disk and a DVD writer)
* writer: TSSTcorp CD/DVDW TS-L532M HR08 PQ: 0 ANSI: 5).
* udftools version: udftools-1.0.0b3-7.fc6

Regards,
Fabio



On 1/31/07, Jeff Garzik <jgarzik@pobox.com> wrote:
> Luca Tettamanti wrote:
> > Hi Jeff, linux-ide,
> > I'm having troubles with libata and UDF on RW media. See below.
> >
> > Il Tue, Jan 30, 2007 at 09:42:34PM +0100, Jan Engelhardt ha scritto:
> >> On Jan 30 2007 21:36, Luca Tettamanti wrote:
> >>> Il Tue, Jan 30, 2007 at 09:02:20PM +0100, Jan Engelhardt ha scritto:
> >>>> On Jan 30 2007 20:53, Luca Tettamanti wrote:
> >>>>> Hi,
> >>>>> pktcdvd on kernel 2.6.20-rc6 is not working as expected. Any file that
> >>>> Did it work previously?
> >>> Yup, It used to work but since I rarely use it I don't remember which
> >>> kernel version worked for me.
> >> Hm, maybe you can take a guess.
> >
> > I can bisect pktcdvd.c if necessary, but it seems that it's innocent.
> >
> >>>>> is written to the device is lost after umount.
> >>>>> I rarely use pktcdvd but at some point it used to work on my system.
> >>>>>
> >>>>> This is what I'm doing:
> >>>>>
> >>>>> root@dreamland:/tmp# cdrwtool -d /dev/scd0 -q
> >>>>> scsi 8:0:0:0: CD-ROM            HL-DT-ST DVDRAM GSA-4167B DL13 PQ: 0 ANSI: 5
> >>>> In case you are using ide-scsi: try without.
> >>> It's libata jmicron driver. Shall I try the "old" PATA driver on the
> >>> next reboot?
> >> If you have lots of CDRs/DVDRs to spare (or a CDRW/DVDRW), every test is
> >> welcome.
> >
> > With the legacy IDE driver it works fine.
> > The unit is DVD-RAM capable so the firmware should handle random writes
> > fine; I've tried mounting /dev/scd0 rw *without* pktcdvd and I still
> > lose files. So I guess it has something to do with libata.
> >
> > So to recap, after formatting the disk with UDF:
> >
> > * libata
> >   - mount with pktcdvd: all files are lost upon umount
> >   - mount scd0 w/out pktcdvd: all files are lost upon umount
> >   - write the disk with cdrecord: OK
> >
> >   pktcdvd reports wrong capacity:
> >
> >   pktcdvd: Fixed packets, 32 blocks, Mode-2 disc
> >   pktcdvd: Max. media speed: 4
> >   pktcdvd: write speed 4x
> >   pktcdvd: 0kB available on disc
> >   UDF-fs INFO UDF 0.9.8.1 (2004/29/09) Mounting volume 'LinuxUDF', timestamp 2007/01/30 18:18 (103c)
> >
> > * legacy IDE driver
> >   - mount with pktcdvd: OK
> >   - mount hda w/out pktcdvd: corrupts FS (duh)
> >   - write the disk with cdrecord: OK
> >
> >   pktcdvd reports correct capacity:
> >
> >   pktcdvd: writer pktcdvd0 mapped to hda
> >   pktcdvd: Fixed packets, 32 blocks, Mode-2 disc
> >   pktcdvd: Max. media speed: 4
> >   pktcdvd: write speed 4x
> >   pktcdvd: 551232kB available on disc
> >   UDF-fs INFO UDF 0.9.8.1 (2004/29/09) Mounting volume 'LinuxUDF', timestamp 2007/01/30 22:19 (103c)
> >
> > The HW is a JMicron controller:
> > 02:00.0 IDE interface: JMicron Technologies, Inc. JMicron 20360/20363 AHCI Controller (rev 02)
> > 02:00.1 IDE interface: JMicron Technologies, Inc. JMicron 20360/20363 AHCI Controller (rev 02)
>
> hmmm, definitely interesting behavior.
>
> Would you mind putting this info into a bugzilla.kernel.org report, so
> that it is not lost?  This bug will likely go into a heavy ATAPI
> debugging session that is coming in a few weeks, but not immediately :/
>
>         Jeff
>
>
>
> -
> To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at  http://vger.kernel.org/majordomo-info.html
> Please read the FAQ at  http://www.tux.org/lkml/
>

Re: [2.6.20-rc6] pktcdvd doesn't work

[Luca]

On 1/31/07, Jeff Garzik <jgarzik@pobox.com> wrote:
> Luca Tettamanti wrote:
> > Hi Jeff, linux-ide,
> > I'm having troubles with libata and UDF on RW media. See below.
> >
> > Il Tue, Jan 30, 2007 at 09:42:34PM +0100, Jan Engelhardt ha scritto:
> >> On Jan 30 2007 21:36, Luca Tettamanti wrote:
> >>> Il Tue, Jan 30, 2007 at 09:02:20PM +0100, Jan Engelhardt ha scritto:
> >>>> On Jan 30 2007 20:53, Luca Tettamanti wrote:
> >>>>> Hi,
> >>>>> pktcdvd on kernel 2.6.20-rc6 is not working as expected. Any file that
> >>>> Did it work previously?
> >>> Yup, It used to work but since I rarely use it I don't remember which
> >>> kernel version worked for me.
> >> Hm, maybe you can take a guess.
> >
> > I can bisect pktcdvd.c if necessary, but it seems that it's innocent.
> >
> >>>>> is written to the device is lost after umount.
> >>>>> I rarely use pktcdvd but at some point it used to work on my system.
> >>>>>
> >>>>> This is what I'm doing:
> >>>>>
> >>>>> root@dreamland:/tmp# cdrwtool -d /dev/scd0 -q
> >>>>> scsi 8:0:0:0: CD-ROM            HL-DT-ST DVDRAM GSA-4167B DL13 PQ: 0 ANSI: 5
> >>>> In case you are using ide-scsi: try without.
> >>> It's libata jmicron driver. Shall I try the "old" PATA driver on the
> >>> next reboot?
> >> If you have lots of CDRs/DVDRs to spare (or a CDRW/DVDRW), every test is
> >> welcome.
> >
> > With the legacy IDE driver it works fine.
> > The unit is DVD-RAM capable so the firmware should handle random writes
> > fine; I've tried mounting /dev/scd0 rw *without* pktcdvd and I still
> > lose files. So I guess it has something to do with libata.
> >
> > So to recap, after formatting the disk with UDF:
> >
> > * libata
> >   - mount with pktcdvd: all files are lost upon umount
> >   - mount scd0 w/out pktcdvd: all files are lost upon umount
> >   - write the disk with cdrecord: OK
> >
> >   pktcdvd reports wrong capacity:
> >
> >   pktcdvd: Fixed packets, 32 blocks, Mode-2 disc
> >   pktcdvd: Max. media speed: 4
> >   pktcdvd: write speed 4x
> >   pktcdvd: 0kB available on disc
> >   UDF-fs INFO UDF 0.9.8.1 (2004/29/09) Mounting volume 'LinuxUDF', timestamp 2007/01/30 18:18 (103c)
> >
> > * legacy IDE driver
> >   - mount with pktcdvd: OK
> >   - mount hda w/out pktcdvd: corrupts FS (duh)
> >   - write the disk with cdrecord: OK
> >
> >   pktcdvd reports correct capacity:
> >
> >   pktcdvd: writer pktcdvd0 mapped to hda
> >   pktcdvd: Fixed packets, 32 blocks, Mode-2 disc
> >   pktcdvd: Max. media speed: 4
> >   pktcdvd: write speed 4x
> >   pktcdvd: 551232kB available on disc
> >   UDF-fs INFO UDF 0.9.8.1 (2004/29/09) Mounting volume 'LinuxUDF', timestamp 2007/01/30 22:19 (103c)
> >
> > The HW is a JMicron controller:
> > 02:00.0 IDE interface: JMicron Technologies, Inc. JMicron 20360/20363 AHCI Controller (rev 02)
> > 02:00.1 IDE interface: JMicron Technologies, Inc. JMicron 20360/20363 AHCI Controller (rev 02)
>
> hmmm, definitely interesting behavior.
>
> Would you mind putting this info into a bugzilla.kernel.org report, so
> that it is not lost?

Done, ID is 7910.

Luca

Re: [2.6.20-rc6] pktcdvd doesn't work

[Adrian Bunk]

On Wed, Jan 31, 2007 at 05:58:19AM -0500, Jeff Garzik wrote:
> Luca Tettamanti wrote:
> >Hi Jeff, linux-ide,
> >I'm having troubles with libata and UDF on RW media. See below.
> >
> >Il Tue, Jan 30, 2007 at 09:42:34PM +0100, Jan Engelhardt ha scritto: 
> >>On Jan 30 2007 21:36, Luca Tettamanti wrote:
> >>>Il Tue, Jan 30, 2007 at 09:02:20PM +0100, Jan Engelhardt ha scritto: 
> >>>>On Jan 30 2007 20:53, Luca Tettamanti wrote:
> >>>>>Hi,
> >>>>>pktcdvd on kernel 2.6.20-rc6 is not working as expected. Any file that
> >>>>Did it work previously?
> >>>Yup, It used to work but since I rarely use it I don't remember which
> >>>kernel version worked for me.
> >>Hm, maybe you can take a guess.
> >
> >I can bisect pktcdvd.c if necessary, but it seems that it's innocent.
> > 
> >>>>>is written to the device is lost after umount.
> >>>>>I rarely use pktcdvd but at some point it used to work on my system.
> >>>>>
> >>>>>This is what I'm doing:
> >>>>>
> >>>>>root@dreamland:/tmp# cdrwtool -d /dev/scd0 -q
> >>>>>scsi 8:0:0:0: CD-ROM            HL-DT-ST DVDRAM GSA-4167B DL13 PQ: 0 
> >>>>>ANSI: 5
> >>>>In case you are using ide-scsi: try without.
> >>>It's libata jmicron driver. Shall I try the "old" PATA driver on the
> >>>next reboot?
> >>If you have lots of CDRs/DVDRs to spare (or a CDRW/DVDRW), every test is
> >>welcome.
> >
> >With the legacy IDE driver it works fine.
> >The unit is DVD-RAM capable so the firmware should handle random writes
> >fine; I've tried mounting /dev/scd0 rw *without* pktcdvd and I still
> >lose files. So I guess it has something to do with libata.
> >
> >So to recap, after formatting the disk with UDF:
> >
> >* libata
> >  - mount with pktcdvd: all files are lost upon umount
> >  - mount scd0 w/out pktcdvd: all files are lost upon umount
> >  - write the disk with cdrecord: OK
> >
> >  pktcdvd reports wrong capacity:
> >  
> >  pktcdvd: Fixed packets, 32 blocks, Mode-2 disc
> >  pktcdvd: Max. media speed: 4
> >  pktcdvd: write speed 4x
> >  pktcdvd: 0kB available on disc
> >  UDF-fs INFO UDF 0.9.8.1 (2004/29/09) Mounting volume 'LinuxUDF', 
> >  timestamp 2007/01/30 18:18 (103c)
> >
> >* legacy IDE driver
> >  - mount with pktcdvd: OK
> >  - mount hda w/out pktcdvd: corrupts FS (duh)
> >  - write the disk with cdrecord: OK
> >
> >  pktcdvd reports correct capacity:
> >  
> >  pktcdvd: writer pktcdvd0 mapped to hda
> >  pktcdvd: Fixed packets, 32 blocks, Mode-2 disc
> >  pktcdvd: Max. media speed: 4
> >  pktcdvd: write speed 4x
> >  pktcdvd: 551232kB available on disc
> >  UDF-fs INFO UDF 0.9.8.1 (2004/29/09) Mounting volume 'LinuxUDF', 
> >  timestamp 2007/01/30 22:19 (103c)
> >
> >The HW is a JMicron controller:
> >02:00.0 IDE interface: JMicron Technologies, Inc. JMicron 20360/20363 AHCI 
> >Controller (rev 02)
> >02:00.1 IDE interface: JMicron Technologies, Inc. JMicron 20360/20363 AHCI 
> >Controller (rev 02)
> 
> hmmm, definitely interesting behavior.
> 
> Would you mind putting this info into a bugzilla.kernel.org report, so 
> that it is not lost?  This bug will likely go into a heavy ATAPI 
> debugging session that is coming in a few weeks, but not immediately :/

Is this related to #7810 (which is caused by Christoph's patches) or is 
this issue another 2.6.20-rc pktcdvd regression?

> 	Jeff

cu
Adrian

-- 

       "Is there not promise of rain?" Ling Tan asked suddenly out
        of the darkness. There had been need of rain for many days.
       "Only a promise," Lao Er said.
                                       Pearl S. Buck - Dragon Seed

Re: [2.6.20-rc6] pktcdvd doesn't work

[Luca Tettamanti]

Hi Adrian,

Il Thu, Feb 01, 2007 at 12:10:13AM +0100, Adrian Bunk ha scritto: 
> On Wed, Jan 31, 2007 at 05:58:19AM -0500, Jeff Garzik wrote:
> > Luca Tettamanti wrote:
> > >Hi Jeff, linux-ide,
> > >I'm having troubles with libata and UDF on RW media. See below.
> > >
> > >Il Tue, Jan 30, 2007 at 09:42:34PM +0100, Jan Engelhardt ha scritto: 
> > >>On Jan 30 2007 21:36, Luca Tettamanti wrote:
> > >>>Il Tue, Jan 30, 2007 at 09:02:20PM +0100, Jan Engelhardt ha scritto: 
> > >>>>On Jan 30 2007 20:53, Luca Tettamanti wrote:
> > >>>>>Hi,
> > >>>>>pktcdvd on kernel 2.6.20-rc6 is not working as expected. Any file that
> > >>>>Did it work previously?
> > >>>Yup, It used to work but since I rarely use it I don't remember which
> > >>>kernel version worked for me.
> > >>Hm, maybe you can take a guess.
> > >
> > >I can bisect pktcdvd.c if necessary, but it seems that it's innocent.
> > > 
> > >>>>>is written to the device is lost after umount.
> > >>>>>I rarely use pktcdvd but at some point it used to work on my system.
> > >>>>>
> > >>>>>This is what I'm doing:
> > >>>>>
> > >>>>>root@dreamland:/tmp# cdrwtool -d /dev/scd0 -q
> > >>>>>scsi 8:0:0:0: CD-ROM            HL-DT-ST DVDRAM GSA-4167B DL13 PQ: 0 
> > >>>>>ANSI: 5
> > >>>>In case you are using ide-scsi: try without.
> > >>>It's libata jmicron driver. Shall I try the "old" PATA driver on the
> > >>>next reboot?
> > >>If you have lots of CDRs/DVDRs to spare (or a CDRW/DVDRW), every test is
> > >>welcome.
> > >
> > >With the legacy IDE driver it works fine.
> > >The unit is DVD-RAM capable so the firmware should handle random writes
> > >fine; I've tried mounting /dev/scd0 rw *without* pktcdvd and I still
> > >lose files. So I guess it has something to do with libata.
> > >
> > >So to recap, after formatting the disk with UDF:
> > >
> > >* libata
> > >  - mount with pktcdvd: all files are lost upon umount
> > >  - mount scd0 w/out pktcdvd: all files are lost upon umount
> > >  - write the disk with cdrecord: OK
> > >
> > >  pktcdvd reports wrong capacity:
> > >  
> > >  pktcdvd: Fixed packets, 32 blocks, Mode-2 disc
> > >  pktcdvd: Max. media speed: 4
> > >  pktcdvd: write speed 4x
> > >  pktcdvd: 0kB available on disc
> > >  UDF-fs INFO UDF 0.9.8.1 (2004/29/09) Mounting volume 'LinuxUDF', 
> > >  timestamp 2007/01/30 18:18 (103c)
> > >
> > >* legacy IDE driver
> > >  - mount with pktcdvd: OK
> > >  - mount hda w/out pktcdvd: corrupts FS (duh)
> > >  - write the disk with cdrecord: OK
> > >
> > >  pktcdvd reports correct capacity:
> > >  
> > >  pktcdvd: writer pktcdvd0 mapped to hda
> > >  pktcdvd: Fixed packets, 32 blocks, Mode-2 disc
> > >  pktcdvd: Max. media speed: 4
> > >  pktcdvd: write speed 4x
> > >  pktcdvd: 551232kB available on disc
> > >  UDF-fs INFO UDF 0.9.8.1 (2004/29/09) Mounting volume 'LinuxUDF', 
> > >  timestamp 2007/01/30 22:19 (103c)
> > >
> > >The HW is a JMicron controller:
> > >02:00.0 IDE interface: JMicron Technologies, Inc. JMicron 20360/20363 AHCI 
> > >Controller (rev 02)
> > >02:00.1 IDE interface: JMicron Technologies, Inc. JMicron 20360/20363 AHCI 
> > >Controller (rev 02)
> > 
> > hmmm, definitely interesting behavior.
> > 
> > Would you mind putting this info into a bugzilla.kernel.org report, so 
> > that it is not lost?  This bug will likely go into a heavy ATAPI 
> > debugging session that is coming in a few weeks, but not immediately :/
> 
> Is this related to #7810 (which is caused by Christoph's patches) or is 
> this issue another 2.6.20-rc pktcdvd regression?

To me it looks unrelated to #7810. In my case files are "written" to the
disk but they disappear after umount, I don't get any OOPS (nothing at
all in the log).
I'm not sure it's a regression either. As I said I rarely use pktcdvd,
it's possible that the last time I used it I still had the old
motherboard with VIA IDE controller.

Luca
-- 
Software is like sex; it's better when it's free.
Linus Torvalds