Messages in this thread | | | Date | Thu, 28 Apr 2005 20:26:55 +0200 | From | Tomasz Torcz <> | Subject | Re: Extremely poor umass transfer rates |
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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@irc.-nie.spam-.pl "God is more forgiving."
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