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stlpaul is offline stlpaul
2009-12-25 , 21:40
Posts: 1,141 | Thanked: 781 times | Joined on Dec 2009 @ Magical Unicorn Land
#1
Hi, I just got N900 a few days ago and I'm really disappointed at the slow write speeds. It's writing about 800kb/sec over USB, and less than half of that speed if I use sftp over wifi. That's almost as bad as my N95 over bluetooth!

Is it just really this slow or is something wrong? I'm quite disappointed. It'll take forever to fill 32gb this way.

UPDATE: it seems the CFQ i/o scheduler was the culprit in my case. Read later posts in thread for details.
Last edited by stlpaul; 2010-01-05 at 05:09. Reason: solved
 
mysticrokks is offline mysticrokks
2009-12-25 , 21:46
Posts: 589 | Thanked: 54 times | Joined on Dec 2009 @ london
#2
erm thats slow-- not sure why-- i really didnt notice it being slow.. maybe your flash memory is fried
 
stlpaul is offline stlpaul
2009-12-25 , 21:53
Posts: 1,141 | Thanked: 781 times | Joined on Dec 2009 @ Magical Unicorn Land
#3
It takes like 20 minutes to transfer 1 gig. It's painful.
 
mysticrokks is offline mysticrokks
2009-12-25 , 21:56
Posts: 589 | Thanked: 54 times | Joined on Dec 2009 @ london
#4
Originally Posted by stlpaul View Post
It takes like 20 minutes to transfer 1 gig. It's painful.

thats not normal mate.. you have problem with your phone-- sounds like your flash as its slow on usb and wifi
 
reviver is offline reviver
2009-12-25 , 21:56
Posts: 65 | Thanked: 43 times | Joined on Dec 2009
#5
Did a little test for you by copying 500 Mb file over USB from my raid array to N900 in mass memory mode.

Internal mem around 17500 Kb/sec
Mem card (cant remember its details) 11000 Kb/sec
 
stlpaul is offline stlpaul
2009-12-25 , 22:04
Posts: 1,141 | Thanked: 781 times | Joined on Dec 2009 @ Magical Unicorn Land
#6
Hmm, that seems more like the kind of speed I would expect. Did you mount with the "sync" option? If not, did you sync to be sure it's not just being cached in the background? Or copy enough data to exhaust the disk cache buffers on your PC.

Here's my info from lsusb -v, everything seems normal to me.

Code:
Bus 002 Device 010: 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     0x0040  1x 64 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     0x0040  1x 64 bytes          
        bInterval               0                       
  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     0x0040  1x 64 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     0x0040  1x 64 bytes          
        bInterval               0                       
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)
 
stlpaul is offline stlpaul
2009-12-25 , 22:21
Posts: 1,141 | Thanked: 781 times | Joined on Dec 2009 @ Magical Unicorn Land
#7
Hmm, it seems my read speeds are very slow, too. About 1.3MB/sec reading from phone to PC over USB...

On my USB MicroSD card reader I get 20MB/sec and over 30 on a USB hard drive so I know my USB port is working.
 
reviver is offline reviver
2009-12-25 , 22:23
Posts: 65 | Thanked: 43 times | Joined on Dec 2009
#8
Sorry, tested with XP machine so no mount options etc. On the other hand I think that means it doesn't buffer much anything.

Can't really currently test with Linux. I never have had any problems with the speed when transferring larger mp3 collections etc.
 
stlpaul is offline stlpaul
2009-12-25 , 22:30
Posts: 1,141 | Thanked: 781 times | Joined on Dec 2009 @ Magical Unicorn Land
#9
I just found another thread where a couple others have similar speeds (http://talk.maemo.org/showthread.php?t=37738)... Hmm. I'll have to experiment more with other ports later. Now it's Christmas party time. Thanks for your help. I'll update if I discover anything new.
 
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Jack6428 is offline Jack6428
2009-12-25 , 23:14
Posts: 635 | Thanked: 282 times | Joined on Sep 2009 @ Black Mesa Research Facility
#10
Originally Posted by stlpaul View Post
It takes like 20 minutes to transfer 1 gig. It's painful.
20 minutes ? It takes just 58 seconds with my N900....definately a problem at your end mate! I guess you don't have USB 2.0 ?
 
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