On Sat, 2010-03-06 at 11:05 -0300, Luigi Castro Cardeles wrote: > Hi list, > > > I use fedora 12 on a dell inspiron 1545 laptop. > (2.6.31.12-174.2.22.fc12.x86_64). > i have a external usb hd and i can't make it connect like a usb 2.0 > device. > this device is ntfs format > > > I check if the device is using ehci (dmesg after i plug the device) > [root@localhost ~]# dmesg | grep USB > usb 2-2: new high speed USB device using ehci_hcd and address 2 > > > I check if this device is connected on a usb 2.0 > [root@localhost ~]# lsusb > Bus 008 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub > Bus 002 Device 015: ID 0471:2021 Philips > Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub > > > I mount the device with this options: > /dev/sdc1 on /media/hd_backup type fuseblk > (rw,nosuid,nodev,allow_other,blksize=4096) > > > but when i use cp, mv or rsync, the max speed i get is max 6MB/s (a > lot 800kB/s). > If i use this device on Windows (tested with Vista and Seven), i get > much high transfer rate. > I read about sync and async options, but if i put sync or async on > fstab, it does not alter the transfer rate. > > > Is this the normal upload transfer rate? I am doing something wrong? Try this as an experiment: echo 1024 > /sys/block/sdc/device/max_sectors and repeat your I/O measurement. poc -- users mailing list users@xxxxxxxxxxxxxxxxxxxxxxx To unsubscribe or change subscription options: https://admin.fedoraproject.org/mailman/listinfo/users Guidelines: http://fedoraproject.org/wiki/Mailing_list_guidelines
