Re: Extremely poor umass transfer rates

[Tomasz Torcz]

On Thu, Apr 28, 2005 at 07:55:40PM +0200, Mark Rosenstand wrote:
> The line that 'hald' puts in fstab looks like this:
> 
> 	/dev/sdb /media/usbdisk vfat \
> 		user,exec,noauto,utf8,noatime,sync,managed 0 0

 Are you sure it's correct? I can't even mount with those options:

#v+
# mount /dev/sdb1 /mnt/other -t vfat -o user,exec,noauto,utf8,noatime,sync,managed 
mount: wrong fs type, bad option, bad superblock on /dev/sdb1
       missing codepage or other error
       In some cases useful info is found in syslog - try
       dmesg | tail  or so

# dmesg | tail -2 
usb-storage: device scan complete
FAT: Unrecognized mount option "managed" or missing value
#v-

 Omitting "managed" seems to work. But it's slooow:

# dd if=/dev/zero  bs=1M count=100 | pv > /mnt/other/100MB
1,17MB 0:00:28 [41,7kB/s] [      <=>                ]

It stays at about 40 kB/s during all transfer. 
Reading is as fast as it should be = about 18 MB/s (after umount, mount
again, to clear cache). 

 My device is Kingston USB memory stick with USB 2.0, connected to USB
2.0 controller of nForce2 motherboard.

 Here's dmesg after plugin:

#v+
usb 1-6: new high speed USB device using ehci_hcd and address 3
Initializing USB Mass Storage driver...
scsi2 : SCSI emulation for USB Mass Storage devices
usbcore: registered new driver usb-storage
USB Mass Storage support registered.
usb-storage: device found at 3
usb-storage: waiting for device to settle before scanning
  Vendor: Kingston  Model: DataTraveler II+  Rev: 1.13
  Type:   Direct-Access                      ANSI SCSI revision: 00
SCSI device sdb: 502784 512-byte hdwr sectors (257 MB)
sdb: Write Protect is off
sdb: Mode Sense: 23 00 00 00
sdb: assuming drive cache: write through
SCSI device sdb: 502784 512-byte hdwr sectors (257 MB)
sdb: Write Protect is off
sdb: Mode Sense: 23 00 00 00
sdb: assuming drive cache: write through
 sdb: sdb1
Attached scsi removable disk sdb at scsi2, channel 0, id 0, lun 0
usb-storage: device scan complete
FAT: Unrecognized mount option "managed" or missing value
#v-

 .config attached

-- 
Tomasz Torcz                 "God, root, what's the difference?"
zdzichu@xxxxxxxxxxxxxxxxx         "God is more forgiving."

Attachment: config.gz
Description: application/gunzip