Hi,
I got a new external dvd burner from LG (GSA-5163D) and want to use this
device for backup purposes. Therefore I tried to use the standard blockdevice
(for me it's /dev/sr0) and created a new udf filesystem on a blank dvd-ram.
But the writing performance can't be called performance because writing speed
is 150 kb/s. Therefore I've tried to use the pktcdvd driver to improve
writing performance but I didn't get it working with my device. I did some
debuging but I've reached a point where I don't know what I have to do now.
What I've done so far:
- "pktsetup dvdram /dev/sr0" throws an error in dmesg.
- enabled debugging in include/linux/pktcdvd.h: "#define PACKET_DEBUG 2"
- added some VPRINTK statements to drivers/block/pktcdvd.c to find out what
doesn't work: in "static int pkt_generic_packet(struct pktcdvd_device *pd,
struct packet_command *cgc)" rq->errors is set to 134217730 after
"wait_for_completion(&wait);" has been called. Due to my VPRINTK statements
and dmesg "generic_unplug_device(q);" will never be called in this function
which is strange because it should be called just before
"wait_for_completion(&wait);".
- Here is the dmesg dump after pluging in my device and calling "pktsetup
dvdram /dev/sr0":
Dec 27 05:17:53 [kernel] usb 1-3: new high speed USB device using ehci_hcd and
address 4
Dec 27 05:17:54 [kernel] scsi2 : SCSI emulation for USB Mass Storage devices
Dec 27 05:17:54 [kernel] usb-storage: device found at 4
Dec 27 05:17:54 [kernel] usb-storage: waiting for device to settle before
scanning
Dec 27 05:17:59 [kernel] Vendor: HL-DT-ST Model: DVDRAM GSA-5163D Rev:
A105
Dec 27 05:17:59 [kernel] sr0: scsi3-mmc drive: 23x/23x writer dvd-ram cd/rw
xa/form2 cdda tray
Dec 27 05:17:59 [kernel] usb-storage: device scan complete
Dec 27 05:19:00 [kernel] pktcdvd: v0.2.0a 2004-07-14 Jens Axboe
(axboe(a)suse.de) and petero2(a)telia.com
Dec 27 05:19:12 [kernel] kcdrwd: i:0 ow:0 rw:0 ww:0 rec:0 fin:0
Dec 27 05:19:12 [kernel] pktcdvd: entering open
Dec 27 05:19:12 [kernel] pktcdvd: elv_add_request: rq->errors: 0
- Last output repeated 2 times -
Dec 27 05:19:12 [kernel] pktcdvd: pkt_generic_packet: rq->errors: 134217730
- necessary parts of "lspci -v":
00:1d.0 USB Controller: Intel Corporation 82801DB/DBL/DBM (ICH4/ICH4-L/ICH4-M)
USB UHCI Controller #1 (rev 01) (prog-if 00 [UHCI])
Subsystem: IBM Unknown device 052d
Flags: bus master, medium devsel, latency 0, IRQ 11
I/O ports at 1800 [size=32]
00:1d.1 USB Controller: Intel Corporation 82801DB/DBL/DBM (ICH4/ICH4-L/ICH4-M)
USB UHCI Controller #2 (rev 01) (prog-if 00 [UHCI])
Subsystem: IBM Unknown device 052d
Flags: bus master, medium devsel, latency 0, IRQ 11
I/O ports at 1820 [size=32]
00:1d.2 USB Controller: Intel Corporation 82801DB/DBL/DBM (ICH4/ICH4-L/ICH4-M)
USB UHCI Controller #3 (rev 01) (prog-if 00 [UHCI])
Subsystem: IBM Unknown device 052d
Flags: bus master, medium devsel, latency 0, IRQ 11
I/O ports at 1840 [size=32]
00:1d.7 USB Controller: Intel Corporation 82801DB/DBM (ICH4/ICH4-M) USB2 EHCI
Controller (rev 01) (prog-if 20 [EHCI])
Subsystem: IBM Unknown device 052e
Flags: bus master, medium devsel, latency 0, IRQ 11
Memory at c0000000 (32-bit, non-prefetchable) [size=1K]
Capabilities: [50] Power Management version 2
Capabilities: [58] Debug port
- "lsusb -v":
Bus 004 Device 001: ID 0000:0000
Device Descriptor:
bLength 18
bDescriptorType 1
bcdUSB 1.10
bDeviceClass 9 Hub
bDeviceSubClass 0 Unused
bDeviceProtocol 0
bMaxPacketSize0 8
idVendor 0x0000
idProduct 0x0000
bcdDevice 2.06
iManufacturer 3 Linux 2.6.14-gentoo-r5r40 uhci_hcd
iProduct 2 UHCI Host Controller
iSerial 1 0000:00:1d.2
bNumConfigurations 1
Configuration Descriptor:
bLength 9
bDescriptorType 2
wTotalLength 25
bNumInterfaces 1
bConfigurationValue 1
iConfiguration 0
bmAttributes 0xc0
Self Powered
MaxPower 0mA
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 0
bAlternateSetting 0
bNumEndpoints 1
bInterfaceClass 9 Hub
bInterfaceSubClass 0 Unused
bInterfaceProtocol 0
iInterface 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x81 EP 1 IN
bmAttributes 3
Transfer Type Interrupt
Synch Type none
wMaxPacketSize 2
bInterval 255
Language IDs: (length=4)
0409 English(US)
Bus 003 Device 001: ID 0000:0000
Device Descriptor:
bLength 18
bDescriptorType 1
bcdUSB 1.10
bDeviceClass 9 Hub
bDeviceSubClass 0 Unused
bDeviceProtocol 0
bMaxPacketSize0 8
idVendor 0x0000
idProduct 0x0000
bcdDevice 2.06
iManufacturer 3 Linux 2.6.14-gentoo-r5r40 uhci_hcd
iProduct 2 UHCI Host Controller
iSerial 1 0000:00:1d.1
bNumConfigurations 1
Configuration Descriptor:
bLength 9
bDescriptorType 2
wTotalLength 25
bNumInterfaces 1
bConfigurationValue 1
iConfiguration 0
bmAttributes 0xc0
Self Powered
MaxPower 0mA
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 0
bAlternateSetting 0
bNumEndpoints 1
bInterfaceClass 9 Hub
bInterfaceSubClass 0 Unused
bInterfaceProtocol 0
iInterface 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x81 EP 1 IN
bmAttributes 3
Transfer Type Interrupt
Synch Type none
wMaxPacketSize 2
bInterval 255
Language IDs: (length=4)
0409 English(US)
Bus 002 Device 001: ID 0000:0000
Device Descriptor:
bLength 18
bDescriptorType 1
bcdUSB 1.10
bDeviceClass 9 Hub
bDeviceSubClass 0 Unused
bDeviceProtocol 0
bMaxPacketSize0 8
idVendor 0x0000
idProduct 0x0000
bcdDevice 2.06
iManufacturer 3 Linux 2.6.14-gentoo-r5r40 uhci_hcd
iProduct 2 UHCI Host Controller
iSerial 1 0000:00:1d.0
bNumConfigurations 1
Configuration Descriptor:
bLength 9
bDescriptorType 2
wTotalLength 25
bNumInterfaces 1
bConfigurationValue 1
iConfiguration 0
bmAttributes 0xc0
Self Powered
MaxPower 0mA
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 0
bAlternateSetting 0
bNumEndpoints 1
bInterfaceClass 9 Hub
bInterfaceSubClass 0 Unused
bInterfaceProtocol 0
iInterface 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x81 EP 1 IN
bmAttributes 3
Transfer Type Interrupt
Synch Type none
wMaxPacketSize 2
bInterval 255
Language IDs: (length=4)
0409 English(US)
Bus 001 Device 003: ID 152e:e003
Device Descriptor:
bLength 18
bDescriptorType 1
bcdUSB 2.00
bDeviceClass 0 (Defined at Interface level)
bDeviceSubClass 0
bDeviceProtocol 0
bMaxPacketSize0 64
idVendor 0x152e
idProduct 0xe003
bcdDevice 0.01
iManufacturer 1 HL-DT-ST DVDRAM GSA-5163D
iProduct 2 Super Multi DVD Rewriter
iSerial 3 4B13E050
bNumConfigurations 1
Configuration Descriptor:
bLength 9
bDescriptorType 2
wTotalLength 32
bNumInterfaces 1
bConfigurationValue 1
iConfiguration 0
bmAttributes 0xc0
Self Powered
MaxPower 100mA
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 0
bAlternateSetting 0
bNumEndpoints 2
bInterfaceClass 8 Mass Storage
bInterfaceSubClass 6 SCSI
bInterfaceProtocol 80 Bulk (Zip)
iInterface 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x01 EP 1 OUT
bmAttributes 2
Transfer Type Bulk
Synch Type none
wMaxPacketSize 512
bInterval 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x82 EP 2 IN
bmAttributes 2
Transfer Type Bulk
Synch Type none
wMaxPacketSize 512
bInterval 0
Language IDs: (length=4)
0409 English(US)
Bus 001 Device 001: ID 0000:0000
Device Descriptor:
bLength 18
bDescriptorType 1
bcdUSB 2.00
bDeviceClass 9 Hub
bDeviceSubClass 0 Unused
bDeviceProtocol 1 Single TT
bMaxPacketSize0 8
idVendor 0x0000
idProduct 0x0000
bcdDevice 2.06
iManufacturer 3 Linux 2.6.14-gentoo-r5r40 ehci_hcd
iProduct 2 EHCI Host Controller
iSerial 1 0000:00:1d.7
bNumConfigurations 1
Configuration Descriptor:
bLength 9
bDescriptorType 2
wTotalLength 25
bNumInterfaces 1
bConfigurationValue 1
iConfiguration 0
bmAttributes 0xe0
Self Powered
Remote Wakeup
MaxPower 0mA
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 0
bAlternateSetting 0
bNumEndpoints 1
bInterfaceClass 9 Hub
bInterfaceSubClass 0 Unused
bInterfaceProtocol 0
iInterface 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x81 EP 1 IN
bmAttributes 3
Transfer Type Interrupt
Synch Type none
wMaxPacketSize 2
bInterval 12
Language IDs: (length=4)
0409 English(US)
Greetings
Gerald
