Bug 115913

Summary: USB MASS STORAGE very slow upload (sync enabled)
Product: [openSUSE] SUSE LINUX 10.0 Reporter: Ladislav Michnovic <lmichnovic>
Component: KernelAssignee: Hubert Mantel <mantel>
Status: RESOLVED FIXED QA Contact: E-mail List <qa-bugs>
Severity: Major    
Priority: P5 - None    
Version: Beta 4 Plus   
Target Milestone: ---   
Hardware: Other   
OS: All   
Whiteboard:
Found By: Other Services Priority:
Business Priority: Blocker: ---
Marketing QA Status: --- IT Deployment: ---

Description Ladislav Michnovic 2005-09-08 16:46:53 UTC
I experienced slow down uploading data into USB MASS STORAGE against SL 9.3.
It's aprox about 70KBps. Syncing is enabled by default. Disabling syncing
manualy helps a lot. On SL 9.3 it was about 600KBps. 
Tried with two devices, I have now only one by hand.

dmesg:

usb 2-1: new full speed USB device using uhci_hcd and address 2
Initializing USB Mass Storage driver...
scsi0 : SCSI emulation for USB Mass Storage devices
usb-storage: device found at 2
usb-storage: waiting for device to settle before scanning
usbcore: registered new driver usb-storage
USB Mass Storage support registered.
  Vendor: USB       Model: BAR               Rev: 2.00
  Type:   Direct-Access                      ANSI SCSI revision: 02
sda: Unit Not Ready, sense:
: Current: sense key: Unit Attention
    Additional sense: Not ready to ready change, medium may have changed
sda : READ CAPACITY failed.
sda : status=1, message=00, host=0, driver=08
sd: Current: sense key: Unit Attention
    Additional sense: Not ready to ready change, medium may have changed
sda: test WP failed, assume Write Enabled
sda: assuming drive cache: write through
sda: Unit Not Ready, sense:
: Current: sense key: Unit Attention
    Additional sense: Not ready to ready change, medium may have changed
SCSI device sda: 511744 512-byte hdwr sectors (262 MB)
sda: Write Protect is off
sda: Mode Sense: 03 00 00 00
sda: assuming drive cache: write through
SCSI device sda: 511744 512-byte hdwr sectors (262 MB)
sda: Write Protect is off
sda: Mode Sense: 03 00 00 00
sda: assuming drive cache: write through
 sda: sda1
Attached scsi removable disk sda at scsi0, channel 0, id 0, lun 0
Attached scsi generic sg0 at scsi0, channel 0, id 0, lun 0,  type 0
usb-storage: device scan complete
Comment 1 Ladislav Michnovic 2005-09-08 17:25:35 UTC
Sorry, duplicate of 115858. I've just reloaded the page and bugzilla understantd
it as new submition of bug.