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dE_logics
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Joined: 02 Jan 2009
Posts: 2290
Location: $TERM
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 Posted: Mon Apr 12, 2010 5:59 am Post subject: Slow data transfer rates from external DVD writer. |
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I get data transfer rates of ~2MBps on my external writer (when copying)...it's much higher with windows. It can copy a 1.1 GB file in ~1.50 minutes.
Same problem persists with Ubuntu live CD.
Any ideas?
dmesg|grep usb
| Code: | usbcore: registered new interface driver usbfs
usbcore: registered new interface driver hub
usbcore: registered new device driver usb
usb usb1: configuration #1 chosen from 1 choice
usb usb2: configuration #1 chosen from 1 choice
usb usb3: configuration #1 chosen from 1 choice
usb usb4: configuration #1 chosen from 1 choice
usb usb5: configuration #1 chosen from 1 choice
usb usb6: configuration #1 chosen from 1 choice
usbcore: registered new interface driver cdc_acm
usbcore: registered new interface driver usbhid
usbhid: v2.6:USB HID core driver
usb 1-3: new high speed USB device using ehci_hcd and address 3
usb 1-3: configuration #1 chosen from 1 choice
usb 2-2: new low speed USB device using ohci_hcd and address 2
usb 2-2: configuration #1 chosen from 1 choice
input: USB Mouse as /devices/pci0000:00/0000:00:13.0/usb2/2-2/2-2:1.0/input/input7
generic-usb 0003:1B1A:0000.0001: input: USB HID v1.10 Mouse [USB Mouse] on usb-0000:00:13.0-2/input0
usb 3-2: new full speed USB device using ohci_hcd and address 2
usb 3-2: configuration #1 chosen from 1 choice
usbcore: registered new interface driver usb-storage
usb-storage: device found at 3
usb-storage: waiting for device to settle before scanning
usb-storage: device scan complete
usb 1-3: reset high speed USB device using ehci_hcd and address 3
usb 1-3: reset high speed USB device using ehci_hcd and address 3
usb 1-3: reset high speed USB device using ehci_hcd and address 3
usb 1-3: USB disconnect, address 3
usb 1-3: new high speed USB device using ehci_hcd and address 5
usb 1-3: configuration #1 chosen from 1 choice
usb-storage: device found at 5
usb-storage: waiting for device to settle before scanning
usb-storage: device scan complete
usb 1-3: reset high speed USB device using ehci_hcd and address 5
usb 1-3: reset high speed USB device using ehci_hcd and address 5 |
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paulbiz
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Joined: 01 Feb 2004
Posts: 508
Location: St. Louis, Missouri, USA
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| Posted: Tue Apr 13, 2010 10:53 pm Post subject: |
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| Maybe try different I/O schedulers. On my phone deadline is many times faster than cfq. |
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dE_logics
Advocate
Joined: 02 Jan 2009
Posts: 2290
Location: $TERM
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| Posted: Thu Apr 15, 2010 4:26 am Post subject: |
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Hummm...I'll try changing that, I'm currently using deadline.
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