Re: Extremely poor umass transfer rates

From: Mark Rosenstand
Date: Thu Apr 28 2005 - 12:56:49 EST


On Thu, 2005-04-28 at 12:59 -0400, Dave Jones wrote:
> On Thu, Apr 28, 2005 at 06:02:22PM +0200, Mark Rosenstand wrote:
> > I get transfer rates at around 30 kB/s to USB mass storage devices. It
> > applies to both my keyring and my mp3 player. Both are running vfat.
> >
> > I'm running 2.6.12-rc3 for amd64 with patches for inotify and skge. The
> > motherboard is an ASUS K8V-X (VIA K8T800).
> >
> > It worked alright earlier (2.6.10 or 2.6.11, I'll test later if
> > necessary.)
> >
> > Also, if I transfer more than one file at a time the music tracks start
> > overlapping on my mp3 player.
>
> Are you running it on a USB 2.0 capable interface ?

I believe so. How do I verify it?

I've tried to move it to the other on-board hub but without results.

> Is your mp3 player USB2.0 capable ?

I'm not sure. But I do know that it used to be *much* faster than this.
My keyring is USB 2.0 capable and that's slow as well.

> USB1.1 is painfully slow for storage.

Yeah, but I don't think it should be 30 kB/s.

Some more details:


The line that 'hald' puts in fstab looks like this:

/dev/sdb /media/usbdisk vfat \
user,exec,noauto,utf8,noatime,sync,managed 0 0


The relevant parts of my .config:

#
# Miscellaneous USB options
#
CONFIG_USB_DEVICEFS=y
# CONFIG_USB_BANDWIDTH is not set
# CONFIG_USB_DYNAMIC_MINORS is not set
# CONFIG_USB_SUSPEND is not set
# CONFIG_USB_OTG is not set

#
# USB Host Controller Drivers
#
CONFIG_USB_EHCI_HCD=y
# CONFIG_USB_EHCI_SPLIT_ISO is not set
# CONFIG_USB_EHCI_ROOT_HUB_TT is not set
# CONFIG_USB_OHCI_HCD is not set
CONFIG_USB_UHCI_HCD=y
# CONFIG_USB_SL811_HCD is not set

[...]

CONFIG_USB_STORAGE=m


What my dmesg tells me when I attach the device:

usb 2-1: new full speed USB device using uhci_hcd and address 6
scsi6 : SCSI emulation for USB Mass Storage devices
usb-storage: device found at 6
usb-storage: waiting for device to settle before scanning
Vendor: iriver Model: MassStorage Disc Rev:
Type: Direct-Access ANSI SCSI revision: 00
SCSI device sdb: 249857 512-byte hdwr sectors (128 MB)
sdb: Write Protect is off
sdb: Mode Sense: 45 00 00 08
sdb: assuming drive cache: write through
SCSI device sdb: 249857 512-byte hdwr sectors (128 MB)
sdb: Write Protect is off
sdb: Mode Sense: 45 00 00 08
sdb: assuming drive cache: write through
sdb:
Attached scsi removable disk sdb at scsi6, channel 0, id 0, lun 0
usb-storage: device scan complete

Thanks for the advices so far :-)

--
.-. Mark Rosenstand (-.)
oo| cc )
/`'\ (+45) 255 31337 3-n-(
(\_;/) mark@xxxxxxxxxxxxx _(|/`->

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