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Thread: Very Slow (1mb/s) USB transfer speeds

  1. #11
    Join Date
    May 2007
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    236
    Distro
    Ubuntu

    Re: Very Slow (1mb/s) USB transfer speeds

    Quote Originally Posted by matt_symes View Post
    Hi

    I was hoping for more information from dmesg than given. Did you have the drive plugged in when booting up the LiveCD ?

    Try these steps

    1. Umount/unplug the external drive.
    2. Plug the drive back in. Wait for 5 seconds.
    3. Type
    Code:
    dmesg | tail -n20
    4. Post that back here.

    That should give us all the messages about the drive when it is discovered.

    Kind regards
    Code:
    [ 4236.015116] scsi 7:0:0:0: Direct-Access     WD       My Passport 071A 2019 PQ: 0 ANSI: 4
    [ 4236.017430] scsi 7:0:0:1: CD-ROM            WD       Virtual CD 071A  2019 PQ: 0 ANSI: 4
    [ 4236.019633] scsi 7:0:0:2: Enclosure         WD       SES Device       2019 PQ: 0 ANSI: 4
    [ 4236.021951] sd 7:0:0:0: Attached scsi generic sg2 type 0
    [ 4236.028463] sd 7:0:0:0: [sdb] 976717824 512-byte logical blocks: (500 GB/465 GiB)
    [ 4236.030655] sd 7:0:0:0: [sdb] Write Protect is off
    [ 4236.030673] sd 7:0:0:0: [sdb] Mode Sense: 2b 00 10 08
    [ 4236.034892] sd 7:0:0:0: [sdb] No Caching mode page present
    [ 4236.034908] sd 7:0:0:0: [sdb] Assuming drive cache: write through
    [ 4236.037033] sr1: scsi3-mmc drive: 51x/51x caddy
    [ 4236.037555] sr 7:0:0:1: Attached scsi CD-ROM sr1
    [ 4236.037848] sr 7:0:0:1: Attached scsi generic sg3 type 5
    [ 4236.038100] ses 7:0:0:2: Attached Enclosure device
    [ 4236.038277] ses 7:0:0:2: Attached scsi generic sg4 type 13
    [ 4236.048413] sd 7:0:0:0: [sdb] No Caching mode page present
    [ 4236.048427] sd 7:0:0:0: [sdb] Assuming drive cache: write through
    [ 4236.084423]  sdb: sdb1
    [ 4236.102315] sd 7:0:0:0: [sdb] No Caching mode page present
    [ 4236.102330] sd 7:0:0:0: [sdb] Assuming drive cache: write through
    [ 4236.102341] sd 7:0:0:0: [sdb] Attached SCSI disk
    yeah I had it plugged in during boot, the same messages were in the previous just further up, i had to do a dmesg for 200 lines and I saw the same stuff.

    there's all this too if you need it, probably not but here it is anyways, from hdparm

    Code:
    Code:
    /dev/sdb:
     readahead     = 256 (on)
    /dev/sdb:
     look-ahead    =  1 (on)
    /dev/sdb:
     geometry      = 60797/255/63, sectors = 976717824, start = 0
    DCO Revision: 0x0002
    The following features can be selectively disabled via DCO:
    	Transfer modes:
    		 udma0 udma1 udma2 udma3 udma4 udma5 udma6
    	Real max sectors: 976773168
    	ATA command/feature sets:
    		 security AAM HPA
    	SATA command/feature sets:
    		 NCQ interface_power_management SSP
    --------------------------------
    --------------------------------
    
    /dev/sdb:
    
    ATA device, with non-removable media
    	Model Number:       WDC WD5000BMVV-11GNWS0                  
    	Firmware Revision:  01.01A01
    	Transport:          Serial, SATA 1.0a, SATA II Extensions, SATA Rev 2.5, SATA Rev 2.6
    Standards:
    	Supported: 8 7 6 5 
    	Likely used: 8
    Configuration:
    	Logical		max	current
    	cylinders	16383	16383
    	heads		16	16
    	sectors/track	63	63
    	--
    	CHS current addressable sectors:   16514064
    	LBA    user addressable sectors:  268435455
    	LBA48  user addressable sectors:  976773168
    	Logical  Sector size:                   512 bytes
    	Physical Sector size:                  4096 bytes
    	Logical Sector-0 offset:                  0 bytes
    	device size with M = 1024*1024:      476940 MBytes
    	device size with M = 1000*1000:      500107 MBytes (500 GB)
    	cache/buffer size  = 8192 KBytes
    	Nominal Media Rotation Rate: 5400
    Capabilities:
    	LBA, IORDY(can be disabled)
    	Queue depth: 32
    	Standby timer values: spec'd by Standard, with device specific minimum
    	R/W multiple sector transfer: Max = 16	Current = 0
    	Advanced power management level: 128
    	Recommended acoustic management value: 128, current value: 254
    	DMA: *mdma0 mdma1 mdma2 udma0 udma1 udma2 udma3 udma4 udma5 udma6 
    	     Cycle time: min=120ns recommended=120ns
    	PIO: pio0 pio1 pio2 pio3 pio4 
    	     Cycle time: no flow control=120ns  IORDY flow control=120ns
    Commands/features:
    	Enabled	Supported:
    	   *	SMART feature set
    	    	Security Mode feature set
    	   *	Power Management feature set
    	   *	Write cache
    	   *	Look-ahead
    	   *	Host Protected Area feature set
    	   *	WRITE_BUFFER command
    	   *	READ_BUFFER command
    	   *	NOP cmd
    	   *	DOWNLOAD_MICROCODE
    	   *	Advanced Power Management feature set
    	    	SET_MAX security extension
    	   *	Automatic Acoustic Management feature set
    	   *	48-bit Address feature set
    	   *	Device Configuration Overlay feature set
    	   *	Mandatory FLUSH_CACHE
    	   *	FLUSH_CACHE_EXT
    	   *	SMART error logging
    	   *	SMART self-test
    	   *	General Purpose Logging feature set
    	   *	64-bit World wide name
    	   *	IDLE_IMMEDIATE with UNLOAD
    	   *	{READ,WRITE}_DMA_EXT_GPL commands
    	   *	Segmented DOWNLOAD_MICROCODE
    	   *	Gen1 signaling speed (1.5Gb/s)
    	   *	Gen2 signaling speed (3.0Gb/s)
    	   *	Native Command Queueing (NCQ)
    	   *	Host-initiated interface power management
    	   *	Phy event counters
    	   *	Idle-Unload when NCQ is active
    	   *	NCQ priority information
    	    	DMA Setup Auto-Activate optimization
    	    	Device-initiated interface power management
    	   *	Software settings preservation
    	   *	SMART Command Transport (SCT) feature set
    	   *	SCT Features Control (AC4)
    	   *	SCT Data Tables (AC5)
    	    	unknown 206[12] (vendor specific)
    	    	unknown 206[13] (vendor specific)
    	    	unknown 206[14] (vendor specific)
    Security: 
    	Master password revision code = 65534
    		supported
    	not	enabled
    	not	locked
    	not	frozen
    	not	expired: security count
    		supported: enhanced erase
    	138min for SECURITY ERASE UNIT. 138min for ENHANCED SECURITY ERASE UNIT.
    Logical Unit WWN Device Identifier: 50014ee6ab1da18a
    	NAA		: 5
    	IEEE OUI	: 0014ee
    	Unique ID	: 6ab1da18a
    Checksum: correct

  2. #12
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    Re: Very Slow (1mb/s) USB transfer speeds

    Quote Originally Posted by diasf View Post
    Same behaviour on another pc?
    What about another drive on the same pc?
    +1

    Just to make sure that it is not related to the pc: You wrote about a windows box and an ubuntu box, please try if it behaves slowly also on the other pc!

  3. #13
    Join Date
    May 2007
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    Re: Very Slow (1mb/s) USB transfer speeds

    Quote Originally Posted by Olle Wiklund View Post
    +1

    Just to make sure that it is not related to the pc: You wrote about a windows box and an ubuntu box, please try if it behaves slowly also on the other pc!
    yeah it does, I've tried to get it working right on both the PC and my notebook, I found something interesting though.

    initial read test using hdparm at 37GB offset

    hdparm -t --offset 37 /dev/sdb
    /dev/sdb:
    Timing buffered disk reads (offset 37 GB): 6 MB in 4.98 seconds = 1.21 MB/

    /dev/sdb:
    Timing buffered disk reads (offset 37 GB): 2 MB in 3.65 seconds = 561.03 kB/sec
    ----------------------------------------------


    Test while performing a SMART self test in the Linux Disk Utility

    /dev/sdb:
    Timing buffered disk reads (offset 37 GB): 80 MB in 3.05 seconds = 26.26 MB/sec
    /dev/sdb:
    Timing buffered disk reads (offset 37 GB): 80 MB in 3.02 seconds = 26.45 MB/sec
    ----------------------------------------------

    after smart self test finishes
    /dev/sdb:
    Timing buffered disk reads (offset 37 GB): 6 MB in 3.90 seconds = 1.54 MB/sec


    so while the Disk Utility is doing the smart test, speeds are normal and once it's done, speeds drop. I've tested it via file transfer also instead of just the hdparm and file transfers go fast during the Smart self check, but once smart is finished checking or canceled speeds drop to 1.5MB/s

    ----------------------------------------------

    I've actually been doing that a bit and it's not consistent. It's very erratic, it's as if something in the drive is switching from USB 1.1 to 2.0 or something.
    Last edited by davethewave83; October 10th, 2011 at 11:34 AM.

  4. #14
    Join Date
    May 2010
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    Tewkesbury uk
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    Distro
    Ubuntu Development Release

    Re: Very Slow (1mb/s) USB transfer speeds

    Hi

    You dmesg output looks like it's being installed and recognised correctly.

    yeah it does, I've tried to get it working right on both the PC and my notebook,
    and

    so while the Disk Utility is doing the smart test, speeds are normal and once it's done, speeds drop.
    That would tend to suggest it not a power supply issue from the usb power bus.

    You wrote about a windows box and an ubuntu box,
    That would tend to suggest it's not an OS problem.

    Hmm. Not sure

    I have a Western Digital passport 1T. I have never bothered checking the timings on it. When i get some time i will and i will post back.

    Kind regards
    Last edited by matt_symes; October 10th, 2011 at 11:47 AM.
    If you believe everything you read, you better not read. ~ Japanese Proverb

    If you don't read the newspaper, you're uninformed. If you read the newspaper, you're mis-informed. - Mark Twain

  5. #15
    Join Date
    May 2007
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    Re: Very Slow (1mb/s) USB transfer speeds

    Quote Originally Posted by matt_symes View Post
    Hi

    You dmesg output looks like it's being installed and recognised correctly.

    and

    That would tend to suggest it not a power supply issue from the usb power bus.

    That would tend to suggest it's not an OS problem.

    Hmm. Not sure

    I have a Western Digital passport 1T. I have never bothered checking the timings on it. When i get some time i will and i will post back.

    Kind regards
    it's ok I'll try to get western digital to replace it once more. they seem to be resisting the idea this time. They were really nice the first time. They must think I'm toying with them

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