* [gentoo-user] USB mass storage device slow in Gentoo, fast in Windows...?
@ 2009-12-26 22:54 Paul Hartman
2009-12-27 1:00 ` Hung Dang
0 siblings, 1 reply; 8+ messages in thread
From: Paul Hartman @ 2009-12-26 22:54 UTC (permalink / raw
To: gentoo-user
Hi,
I got a Nokia N900 linux internet tablet/phone a few days ago, and
when I connect it in USB Mass Storage mode to a Windows Vista computer
I can write at 17MB/sec, but when I connect it to my Gentoo box my
writes are really slow, between 500-900kb/sec depending on if I mount
in "sync" mode or not. As far as I know it should be just a totally
standard/generic mass storage device. (there were no drivers or
software install needed in windows, it just worked)
Other USB devices plugged into the same port go full speed, and AFAIK
everything appears as if it should be high speed USB 2.0. Has anyone
seen something like this before? I'm not sure what the deal is. It
takes 20 minutes to copy 1 gigabyte from Linux and takes just under 1
minute to do the same in Windows.
I'm not sure about debugging USB or what the options are. Everything
I've used previously has worked without any hassle.
lsusb -vv output for this device:
Bus 001 Device 031: ID 0421:01c7 Nokia Mobile Phones
Device Descriptor:
bLength 18
bDescriptorType 1
bcdUSB 2.00
bDeviceClass 0 (Defined at Interface level)
bDeviceSubClass 0
bDeviceProtocol 0
bMaxPacketSize0 64
idVendor 0x0421 Nokia Mobile Phones
idProduct 0x01c7
bcdDevice 3.16
iManufacturer 1 Nokia
iProduct 2 N900 (Storage Mode)
iSerial 3 (censored)
bNumConfigurations 2
Configuration Descriptor:
bLength 9
bDescriptorType 2
wTotalLength 32
bNumInterfaces 1
bConfigurationValue 1
iConfiguration 4 Max power
bmAttributes 0x80
(Bus Powered)
MaxPower 500mA
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 0
bAlternateSetting 0
bNumEndpoints 2
bInterfaceClass 8 Mass Storage
bInterfaceSubClass 6 SCSI
bInterfaceProtocol 80 Bulk (Zip)
iInterface 6 Mass Storage
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x81 EP 1 IN
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0200 1x 512 bytes
bInterval 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x01 EP 1 OUT
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0200 1x 512 bytes
bInterval 1
Configuration Descriptor:
bLength 9
bDescriptorType 2
wTotalLength 32
bNumInterfaces 1
bConfigurationValue 2
iConfiguration 5 Self-powered
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 6 Mass Storage
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x81 EP 1 IN
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0200 1x 512 bytes
bInterval 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x01 EP 1 OUT
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0200 1x 512 bytes
bInterval 1
Device Qualifier (for other device speed):
bLength 10
bDescriptorType 6
bcdUSB 2.00
bDeviceClass 0 (Defined at Interface level)
bDeviceSubClass 0
bDeviceProtocol 0
bMaxPacketSize0 64
bNumConfigurations 2
Device Status: 0x0000
(Bus Powered)
dmesg output when it is plugged in:
[2920730.031010] usb 1-4: new high speed USB device using ehci_hcd and
address 31
[2920730.146451] usb 1-4: New USB device found, idVendor=0421, idProduct=01c7
[2920730.146455] usb 1-4: New USB device strings: Mfr=1, Product=2,
SerialNumber=3
[2920730.146458] usb 1-4: Product: N900 (Storage Mode)
[2920730.146460] usb 1-4: Manufacturer: Nokia
[2920730.146462] usb 1-4: SerialNumber: (censored)
[2920730.146540] usb 1-4: configuration #1 chosen from 2 choices
[2920730.148268] scsi27 : SCSI emulation for USB Mass Storage devices
[2920730.148342] usb-storage: device found at 31
[2920730.148345] usb-storage: waiting for device to settle before scanning
[2920735.150436] scsi 27:0:0:0: Direct-Access Nokia N900
031 PQ: 0 ANSI: 2
[2920735.150567] sd 27:0:0:0: Attached scsi generic sg7 type 0
[2920735.155882] sd 27:0:0:0: [sdg] Attached SCSI removable disk
[2920735.156449] usb-storage: device scan complete
[2920741.306353] sd 27:0:0:0: [sdg] 56631296 512-byte logical blocks:
(28.9 GB/27.0 GiB)
[2920741.306721] sd 27:0:0:0: [sdg] Assuming drive cache: write through
[2920741.307970] sd 27:0:0:0: [sdg] Assuming drive cache: write through
[2920741.307972] sdg:
And I mounted with these options:
/dev/sdg /mnt/usb vfat
user,sync,umask=1000,rw,noauto,check=relaxed 0 0
thanks
paul
^ permalink raw reply [flat|nested] 8+ messages in thread
* Re: [gentoo-user] USB mass storage device slow in Gentoo, fast in Windows...?
2009-12-26 22:54 [gentoo-user] USB mass storage device slow in Gentoo, fast in Windows...? Paul Hartman
@ 2009-12-27 1:00 ` Hung Dang
2009-12-27 3:18 ` Paul Hartman
0 siblings, 1 reply; 8+ messages in thread
From: Hung Dang @ 2009-12-27 1:00 UTC (permalink / raw
To: gentoo-user
Have you received a lot of debugging messages at the output of dmesg
when copying files?
Hung
On 12/26/09 15:54, Paul Hartman wrote:
> Hi,
>
> I got a Nokia N900 linux internet tablet/phone a few days ago, and
> when I connect it in USB Mass Storage mode to a Windows Vista computer
> I can write at 17MB/sec, but when I connect it to my Gentoo box my
> writes are really slow, between 500-900kb/sec depending on if I mount
> in "sync" mode or not. As far as I know it should be just a totally
> standard/generic mass storage device. (there were no drivers or
> software install needed in windows, it just worked)
>
> Other USB devices plugged into the same port go full speed, and AFAIK
> everything appears as if it should be high speed USB 2.0. Has anyone
> seen something like this before? I'm not sure what the deal is. It
> takes 20 minutes to copy 1 gigabyte from Linux and takes just under 1
> minute to do the same in Windows.
>
> I'm not sure about debugging USB or what the options are. Everything
> I've used previously has worked without any hassle.
>
> lsusb -vv output for this device:
>
> Bus 001 Device 031: ID 0421:01c7 Nokia Mobile Phones
> Device Descriptor:
> bLength 18
> bDescriptorType 1
> bcdUSB 2.00
> bDeviceClass 0 (Defined at Interface level)
> bDeviceSubClass 0
> bDeviceProtocol 0
> bMaxPacketSize0 64
> idVendor 0x0421 Nokia Mobile Phones
> idProduct 0x01c7
> bcdDevice 3.16
> iManufacturer 1 Nokia
> iProduct 2 N900 (Storage Mode)
> iSerial 3 (censored)
> bNumConfigurations 2
> Configuration Descriptor:
> bLength 9
> bDescriptorType 2
> wTotalLength 32
> bNumInterfaces 1
> bConfigurationValue 1
> iConfiguration 4 Max power
> bmAttributes 0x80
> (Bus Powered)
> MaxPower 500mA
> Interface Descriptor:
> bLength 9
> bDescriptorType 4
> bInterfaceNumber 0
> bAlternateSetting 0
> bNumEndpoints 2
> bInterfaceClass 8 Mass Storage
> bInterfaceSubClass 6 SCSI
> bInterfaceProtocol 80 Bulk (Zip)
> iInterface 6 Mass Storage
> Endpoint Descriptor:
> bLength 7
> bDescriptorType 5
> bEndpointAddress 0x81 EP 1 IN
> bmAttributes 2
> Transfer Type Bulk
> Synch Type None
> Usage Type Data
> wMaxPacketSize 0x0200 1x 512 bytes
> bInterval 0
> Endpoint Descriptor:
> bLength 7
> bDescriptorType 5
> bEndpointAddress 0x01 EP 1 OUT
> bmAttributes 2
> Transfer Type Bulk
> Synch Type None
> Usage Type Data
> wMaxPacketSize 0x0200 1x 512 bytes
> bInterval 1
> Configuration Descriptor:
> bLength 9
> bDescriptorType 2
> wTotalLength 32
> bNumInterfaces 1
> bConfigurationValue 2
> iConfiguration 5 Self-powered
> 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 6 Mass Storage
> Endpoint Descriptor:
> bLength 7
> bDescriptorType 5
> bEndpointAddress 0x81 EP 1 IN
> bmAttributes 2
> Transfer Type Bulk
> Synch Type None
> Usage Type Data
> wMaxPacketSize 0x0200 1x 512 bytes
> bInterval 0
> Endpoint Descriptor:
> bLength 7
> bDescriptorType 5
> bEndpointAddress 0x01 EP 1 OUT
> bmAttributes 2
> Transfer Type Bulk
> Synch Type None
> Usage Type Data
> wMaxPacketSize 0x0200 1x 512 bytes
> bInterval 1
> Device Qualifier (for other device speed):
> bLength 10
> bDescriptorType 6
> bcdUSB 2.00
> bDeviceClass 0 (Defined at Interface level)
> bDeviceSubClass 0
> bDeviceProtocol 0
> bMaxPacketSize0 64
> bNumConfigurations 2
> Device Status: 0x0000
> (Bus Powered)
>
>
>
> dmesg output when it is plugged in:
>
> [2920730.031010] usb 1-4: new high speed USB device using ehci_hcd and
> address 31
> [2920730.146451] usb 1-4: New USB device found, idVendor=0421, idProduct=01c7
> [2920730.146455] usb 1-4: New USB device strings: Mfr=1, Product=2,
> SerialNumber=3
> [2920730.146458] usb 1-4: Product: N900 (Storage Mode)
> [2920730.146460] usb 1-4: Manufacturer: Nokia
> [2920730.146462] usb 1-4: SerialNumber: (censored)
> [2920730.146540] usb 1-4: configuration #1 chosen from 2 choices
> [2920730.148268] scsi27 : SCSI emulation for USB Mass Storage devices
> [2920730.148342] usb-storage: device found at 31
> [2920730.148345] usb-storage: waiting for device to settle before scanning
> [2920735.150436] scsi 27:0:0:0: Direct-Access Nokia N900
> 031 PQ: 0 ANSI: 2
> [2920735.150567] sd 27:0:0:0: Attached scsi generic sg7 type 0
> [2920735.155882] sd 27:0:0:0: [sdg] Attached SCSI removable disk
> [2920735.156449] usb-storage: device scan complete
> [2920741.306353] sd 27:0:0:0: [sdg] 56631296 512-byte logical blocks:
> (28.9 GB/27.0 GiB)
> [2920741.306721] sd 27:0:0:0: [sdg] Assuming drive cache: write through
> [2920741.307970] sd 27:0:0:0: [sdg] Assuming drive cache: write through
> [2920741.307972] sdg:
>
>
> And I mounted with these options:
> /dev/sdg /mnt/usb vfat
> user,sync,umask=1000,rw,noauto,check=relaxed 0 0
>
>
> thanks
> paul
>
>
^ permalink raw reply [flat|nested] 8+ messages in thread
* Re: [gentoo-user] USB mass storage device slow in Gentoo, fast in Windows...?
2009-12-27 1:00 ` Hung Dang
@ 2009-12-27 3:18 ` Paul Hartman
2009-12-27 6:01 ` Michael Holmes
0 siblings, 1 reply; 8+ messages in thread
From: Paul Hartman @ 2009-12-27 3:18 UTC (permalink / raw
To: gentoo-user
On Sat, Dec 26, 2009 at 7:00 PM, Hung Dang <hungptit@gmail.com> wrote:
> On 12/26/09 15:54, Paul Hartman wrote:
>> Hi,
>>
>> I got a Nokia N900 linux internet tablet/phone a few days ago, and
>> when I connect it in USB Mass Storage mode to a Windows Vista computer
>> I can write at 17MB/sec, but when I connect it to my Gentoo box my
>> writes are really slow, between 500-900kb/sec depending on if I mount
>> in "sync" mode or not. As far as I know it should be just a totally
>> standard/generic mass storage device. (there were no drivers or
>> software install needed in windows, it just worked)
>>
>> Other USB devices plugged into the same port go full speed, and AFAIK
>> everything appears as if it should be high speed USB 2.0. Has anyone
>> seen something like this before? I'm not sure what the deal is. It
>> takes 20 minutes to copy 1 gigabyte from Linux and takes just under 1
>> minute to do the same in Windows.
>>
>> I'm not sure about debugging USB or what the options are. Everything
>> I've used previously has worked without any hassle.
> Have you received a lot of debugging messages at the output of dmesg
> when copying files?
>
> Hung
No errors, no strange messages at all, it seems normal (only slow). I
have other USB devices like SD card reader, external HDD, and they
perform at full speed when plugged into the same port, so it's weird
to me.
Thanks
Paul
^ permalink raw reply [flat|nested] 8+ messages in thread
* Re: [gentoo-user] USB mass storage device slow in Gentoo, fast in Windows...?
2009-12-27 3:18 ` Paul Hartman
@ 2009-12-27 6:01 ` Michael Holmes
2009-12-27 18:10 ` Paul Hartman
0 siblings, 1 reply; 8+ messages in thread
From: Michael Holmes @ 2009-12-27 6:01 UTC (permalink / raw
To: gentoo-user
2009/12/27 Paul Hartman <paul.hartman+gentoo@gmail.com>:
> On Sat, Dec 26, 2009 at 7:00 PM, Hung Dang <hungptit@gmail.com> wrote:
>> On 12/26/09 15:54, Paul Hartman wrote:
>>> Hi,
>>>
>>> I got a Nokia N900 linux internet tablet/phone a few days ago, and
>>> when I connect it in USB Mass Storage mode to a Windows Vista computer
>>> I can write at 17MB/sec, but when I connect it to my Gentoo box my
>>> writes are really slow, between 500-900kb/sec depending on if I mount
>>> in "sync" mode or not. As far as I know it should be just a totally
>>> standard/generic mass storage device. (there were no drivers or
>>> software install needed in windows, it just worked)
>>>
>>> Other USB devices plugged into the same port go full speed, and AFAIK
>>> everything appears as if it should be high speed USB 2.0. Has anyone
>>> seen something like this before? I'm not sure what the deal is. It
>>> takes 20 minutes to copy 1 gigabyte from Linux and takes just under 1
>>> minute to do the same in Windows.
>>>
>>> I'm not sure about debugging USB or what the options are. Everything
>>> I've used previously has worked without any hassle.
>> Have you received a lot of debugging messages at the output of dmesg
>> when copying files?
>>
>> Hung
>
> No errors, no strange messages at all, it seems normal (only slow). I
> have other USB devices like SD card reader, external HDD, and they
> perform at full speed when plugged into the same port, so it's weird
> to me.
>
> Thanks
> Paul
>
>
This isn't that helpful, but in Windows I get good thoroughputs in
mass storage mode, but compartively weak ones in sync mode. But this
shouldn't be the problem because as far as I know, there are no
ync-mode drivers for good old Linux (which is ironic if you consider
it).
^ permalink raw reply [flat|nested] 8+ messages in thread
* Re: [gentoo-user] USB mass storage device slow in Gentoo, fast in Windows...?
2009-12-27 6:01 ` Michael Holmes
@ 2009-12-27 18:10 ` Paul Hartman
2009-12-27 19:46 ` Paul Hartman
0 siblings, 1 reply; 8+ messages in thread
From: Paul Hartman @ 2009-12-27 18:10 UTC (permalink / raw
To: gentoo-user
On Sun, Dec 27, 2009 at 12:01 AM, Michael Holmes
<holmesmich@googlemail.com> wrote:
> 2009/12/27 Paul Hartman <paul.hartman+gentoo@gmail.com>:
>> On Sat, Dec 26, 2009 at 7:00 PM, Hung Dang <hungptit@gmail.com> wrote:
>>> On 12/26/09 15:54, Paul Hartman wrote:
>>>> Hi,
>>>>
>>>> I got a Nokia N900 linux internet tablet/phone a few days ago, and
>>>> when I connect it in USB Mass Storage mode to a Windows Vista computer
>>>> I can write at 17MB/sec, but when I connect it to my Gentoo box my
>>>> writes are really slow, between 500-900kb/sec depending on if I mount
>>>> in "sync" mode or not. As far as I know it should be just a totally
>>>> standard/generic mass storage device. (there were no drivers or
>>>> software install needed in windows, it just worked)
>>>>
>>>> Other USB devices plugged into the same port go full speed, and AFAIK
>>>> everything appears as if it should be high speed USB 2.0. Has anyone
>>>> seen something like this before? I'm not sure what the deal is. It
>>>> takes 20 minutes to copy 1 gigabyte from Linux and takes just under 1
>>>> minute to do the same in Windows.
>>>>
>>>> I'm not sure about debugging USB or what the options are. Everything
>>>> I've used previously has worked without any hassle.
>>> Have you received a lot of debugging messages at the output of dmesg
>>> when copying files?
>>>
>>> Hung
>>
>> No errors, no strange messages at all, it seems normal (only slow). I
>> have other USB devices like SD card reader, external HDD, and they
>> perform at full speed when plugged into the same port, so it's weird
>> to me.
>>
>> Thanks
>> Paul
>>
>>
>
> This isn't that helpful, but in Windows I get good thoroughputs in
> mass storage mode, but compartively weak ones in sync mode. But this
> shouldn't be the problem because as far as I know, there are no
> ync-mode drivers for good old Linux (which is ironic if you consider
> it).
When I said "sync" mode I mean mounting the device in mass storage
mode with with "-o sync" (as opposed to the default cached/async
mode), which I believe is the default in Windows Vista & Win7 (because
most windows users cannot be bothered to unmount before pulling the
plug).
Thanks
^ permalink raw reply [flat|nested] 8+ messages in thread
* Re: [gentoo-user] USB mass storage device slow in Gentoo, fast in Windows...?
2009-12-27 18:10 ` Paul Hartman
@ 2009-12-27 19:46 ` Paul Hartman
2009-12-27 19:57 ` Paul Hartman
0 siblings, 1 reply; 8+ messages in thread
From: Paul Hartman @ 2009-12-27 19:46 UTC (permalink / raw
To: gentoo-user
On Sun, Dec 27, 2009 at 12:10 PM, Paul Hartman
<paul.hartman+gentoo@gmail.com> wrote:
> On Sun, Dec 27, 2009 at 12:01 AM, Michael Holmes
> <holmesmich@googlemail.com> wrote:
>> 2009/12/27 Paul Hartman <paul.hartman+gentoo@gmail.com>:
>>> On Sat, Dec 26, 2009 at 7:00 PM, Hung Dang <hungptit@gmail.com> wrote:
>>>> On 12/26/09 15:54, Paul Hartman wrote:
>>>>> Hi,
>>>>>
>>>>> I got a Nokia N900 linux internet tablet/phone a few days ago, and
>>>>> when I connect it in USB Mass Storage mode to a Windows Vista computer
>>>>> I can write at 17MB/sec, but when I connect it to my Gentoo box my
>>>>> writes are really slow, between 500-900kb/sec depending on if I mount
>>>>> in "sync" mode or not. As far as I know it should be just a totally
>>>>> standard/generic mass storage device. (there were no drivers or
>>>>> software install needed in windows, it just worked)
>>>>>
>>>>> Other USB devices plugged into the same port go full speed, and AFAIK
>>>>> everything appears as if it should be high speed USB 2.0. Has anyone
>>>>> seen something like this before? I'm not sure what the deal is. It
>>>>> takes 20 minutes to copy 1 gigabyte from Linux and takes just under 1
>>>>> minute to do the same in Windows.
>>>>>
>>>>> I'm not sure about debugging USB or what the options are. Everything
>>>>> I've used previously has worked without any hassle.
>>>> Have you received a lot of debugging messages at the output of dmesg
>>>> when copying files?
>>>>
>>>> Hung
>>>
>>> No errors, no strange messages at all, it seems normal (only slow). I
>>> have other USB devices like SD card reader, external HDD, and they
>>> perform at full speed when plugged into the same port, so it's weird
>>> to me.
>>>
>>> Thanks
>>> Paul
>>>
>>>
>>
>> This isn't that helpful, but in Windows I get good thoroughputs in
>> mass storage mode, but compartively weak ones in sync mode. But this
>> shouldn't be the problem because as far as I know, there are no
>> ync-mode drivers for good old Linux (which is ironic if you consider
>> it).
>
> When I said "sync" mode I mean mounting the device in mass storage
> mode with with "-o sync" (as opposed to the default cached/async
> mode), which I believe is the default in Windows Vista & Win7 (because
> most windows users cannot be bothered to unmount before pulling the
> plug).
>
> Thanks
Well, after a bit more plugging/unplugging of all my USB devices into
various ports in different orders, it seems to be going fast now. I
hate USB :)
Thanks for the help
^ permalink raw reply [flat|nested] 8+ messages in thread
* Re: [gentoo-user] USB mass storage device slow in Gentoo, fast in Windows...?
2009-12-27 19:46 ` Paul Hartman
@ 2009-12-27 19:57 ` Paul Hartman
2009-12-27 20:58 ` Paul Hartman
0 siblings, 1 reply; 8+ messages in thread
From: Paul Hartman @ 2009-12-27 19:57 UTC (permalink / raw
To: gentoo-user
On Sun, Dec 27, 2009 at 1:46 PM, Paul Hartman
<paul.hartman+gentoo@gmail.com> wrote:
> On Sun, Dec 27, 2009 at 12:10 PM, Paul Hartman
> <paul.hartman+gentoo@gmail.com> wrote:
>> On Sun, Dec 27, 2009 at 12:01 AM, Michael Holmes
>> <holmesmich@googlemail.com> wrote:
>>> 2009/12/27 Paul Hartman <paul.hartman+gentoo@gmail.com>:
>>>> On Sat, Dec 26, 2009 at 7:00 PM, Hung Dang <hungptit@gmail.com> wrote:
>>>>> On 12/26/09 15:54, Paul Hartman wrote:
>>>>>> Hi,
>>>>>>
>>>>>> I got a Nokia N900 linux internet tablet/phone a few days ago, and
>>>>>> when I connect it in USB Mass Storage mode to a Windows Vista computer
>>>>>> I can write at 17MB/sec, but when I connect it to my Gentoo box my
>>>>>> writes are really slow, between 500-900kb/sec depending on if I mount
>>>>>> in "sync" mode or not. As far as I know it should be just a totally
>>>>>> standard/generic mass storage device. (there were no drivers or
>>>>>> software install needed in windows, it just worked)
>>>>>>
>>>>>> Other USB devices plugged into the same port go full speed, and AFAIK
>>>>>> everything appears as if it should be high speed USB 2.0. Has anyone
>>>>>> seen something like this before? I'm not sure what the deal is. It
>>>>>> takes 20 minutes to copy 1 gigabyte from Linux and takes just under 1
>>>>>> minute to do the same in Windows.
>>>>>>
>>>>>> I'm not sure about debugging USB or what the options are. Everything
>>>>>> I've used previously has worked without any hassle.
>>>>> Have you received a lot of debugging messages at the output of dmesg
>>>>> when copying files?
>>>>>
>>>>> Hung
>>>>
>>>> No errors, no strange messages at all, it seems normal (only slow). I
>>>> have other USB devices like SD card reader, external HDD, and they
>>>> perform at full speed when plugged into the same port, so it's weird
>>>> to me.
>>>>
>>>> Thanks
>>>> Paul
>>>>
>>>>
>>>
>>> This isn't that helpful, but in Windows I get good thoroughputs in
>>> mass storage mode, but compartively weak ones in sync mode. But this
>>> shouldn't be the problem because as far as I know, there are no
>>> ync-mode drivers for good old Linux (which is ironic if you consider
>>> it).
>>
>> When I said "sync" mode I mean mounting the device in mass storage
>> mode with with "-o sync" (as opposed to the default cached/async
>> mode), which I believe is the default in Windows Vista & Win7 (because
>> most windows users cannot be bothered to unmount before pulling the
>> plug).
>>
>> Thanks
>
> Well, after a bit more plugging/unplugging of all my USB devices into
> various ports in different orders, it seems to be going fast now. I
> hate USB :)
>
> Thanks for the help
Maybe I spoke too soon. It seems what's happening is when I write a
large amount of data, there are several "pdflush" threads at near 100%
i/o wait. I'm thinking it's writing multiple streams over USB which is
causing the massive slow-down.
I'm using 2.6.31, and I see in 2.6.32 there is something called
"Per-backing-device based writeback" which may help me here... I'll
try the new kernel and report back :)
^ permalink raw reply [flat|nested] 8+ messages in thread
* Re: [gentoo-user] USB mass storage device slow in Gentoo, fast in Windows...?
2009-12-27 19:57 ` Paul Hartman
@ 2009-12-27 20:58 ` Paul Hartman
0 siblings, 0 replies; 8+ messages in thread
From: Paul Hartman @ 2009-12-27 20:58 UTC (permalink / raw
To: gentoo-user
On Sun, Dec 27, 2009 at 1:57 PM, Paul Hartman
<paul.hartman+gentoo@gmail.com> wrote:
> On Sun, Dec 27, 2009 at 1:46 PM, Paul Hartman
> <paul.hartman+gentoo@gmail.com> wrote:
>> On Sun, Dec 27, 2009 at 12:10 PM, Paul Hartman
>> <paul.hartman+gentoo@gmail.com> wrote:
>>> On Sun, Dec 27, 2009 at 12:01 AM, Michael Holmes
>>> <holmesmich@googlemail.com> wrote:
>>>> 2009/12/27 Paul Hartman <paul.hartman+gentoo@gmail.com>:
>>>>> On Sat, Dec 26, 2009 at 7:00 PM, Hung Dang <hungptit@gmail.com> wrote:
>>>>>> On 12/26/09 15:54, Paul Hartman wrote:
>>>>>>> Hi,
>>>>>>>
>>>>>>> I got a Nokia N900 linux internet tablet/phone a few days ago, and
>>>>>>> when I connect it in USB Mass Storage mode to a Windows Vista computer
>>>>>>> I can write at 17MB/sec, but when I connect it to my Gentoo box my
>>>>>>> writes are really slow, between 500-900kb/sec depending on if I mount
>>>>>>> in "sync" mode or not. As far as I know it should be just a totally
>>>>>>> standard/generic mass storage device. (there were no drivers or
>>>>>>> software install needed in windows, it just worked)
>>>>>>>
>>>>>>> Other USB devices plugged into the same port go full speed, and AFAIK
>>>>>>> everything appears as if it should be high speed USB 2.0. Has anyone
>>>>>>> seen something like this before? I'm not sure what the deal is. It
>>>>>>> takes 20 minutes to copy 1 gigabyte from Linux and takes just under 1
>>>>>>> minute to do the same in Windows.
>>>>>>>
>>>>>>> I'm not sure about debugging USB or what the options are. Everything
>>>>>>> I've used previously has worked without any hassle.
>>>>>> Have you received a lot of debugging messages at the output of dmesg
>>>>>> when copying files?
>>>>>>
>>>>>> Hung
>>>>>
>>>>> No errors, no strange messages at all, it seems normal (only slow). I
>>>>> have other USB devices like SD card reader, external HDD, and they
>>>>> perform at full speed when plugged into the same port, so it's weird
>>>>> to me.
>>>>>
>>>>> Thanks
>>>>> Paul
>>>>>
>>>>>
>>>>
>>>> This isn't that helpful, but in Windows I get good thoroughputs in
>>>> mass storage mode, but compartively weak ones in sync mode. But this
>>>> shouldn't be the problem because as far as I know, there are no
>>>> ync-mode drivers for good old Linux (which is ironic if you consider
>>>> it).
>>>
>>> When I said "sync" mode I mean mounting the device in mass storage
>>> mode with with "-o sync" (as opposed to the default cached/async
>>> mode), which I believe is the default in Windows Vista & Win7 (because
>>> most windows users cannot be bothered to unmount before pulling the
>>> plug).
>>>
>>> Thanks
>>
>> Well, after a bit more plugging/unplugging of all my USB devices into
>> various ports in different orders, it seems to be going fast now. I
>> hate USB :)
>>
>> Thanks for the help
>
> Maybe I spoke too soon. It seems what's happening is when I write a
> large amount of data, there are several "pdflush" threads at near 100%
> i/o wait. I'm thinking it's writing multiple streams over USB which is
> causing the massive slow-down.
>
> I'm using 2.6.31, and I see in 2.6.32 there is something called
> "Per-backing-device based writeback" which may help me here... I'll
> try the new kernel and report back :)
There is a slight improvement but it's still very slow (less than
2MB/sec). It seems the problem happens if I try to copy more than 1
file to the device. If I copy/sync/copy/sync/copy/sync etc it goes
faster, but that's extremely annoying!
^ permalink raw reply [flat|nested] 8+ messages in thread
end of thread, other threads:[~2009-12-27 22:08 UTC | newest]
Thread overview: 8+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2009-12-26 22:54 [gentoo-user] USB mass storage device slow in Gentoo, fast in Windows...? Paul Hartman
2009-12-27 1:00 ` Hung Dang
2009-12-27 3:18 ` Paul Hartman
2009-12-27 6:01 ` Michael Holmes
2009-12-27 18:10 ` Paul Hartman
2009-12-27 19:46 ` Paul Hartman
2009-12-27 19:57 ` Paul Hartman
2009-12-27 20:58 ` Paul Hartman
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox