On Tue, 28 Nov 2006, Jon Senior wrote: > I tried querying this on the alt.os.linux.slackware NG but got no > assistance and this strikes me as a likely place to find answers. Sorry > if it's out of place. > > I have an IBM T23 laptop which has a no-name PCMCIA USB2 card providing > four USB ports. lspci shows the card to be using the Via VT82xxx chipset > and gives the revision number of the USB 2.0 part to be 63. Devices are > detected by the system and report to be connecting at High-Speed. I have > recompiled the kernel using modules for the USB drivers and removing all > but EHCI and this has no effect so it's not a driver conflict. The > problem is one of speed (or lack thereof!). hdparm -t reports between > 750 Kbits/s 1 Mbit/s depending on it's mood (or so it appears). I have > tested three different devices all of which use different chipsets. Two > cheap USB2 HDD cases and an iRiver H340. None of them attains a transfer > rate like those I can get with Windows (as best as I can tell), and > connecting the devices to one of the original USB 1.1 ports demonstrates > that they are no faster with USB2 than with 1.1. > > I will gladly provide dmesg / logs etc if they will help track this > down. Is it just me, or does no-one get fast transfer rates? Kernels > tested include 2.6.17.4 and 2.6.18.2.
You should get transfers a lot faster than that. Have you checked the system log for any sort of error messages? And most importantly, are the drives mounted with the "-o sync" option? That slows everything down tremendously. Alan Stern ------------------------------------------------------------------------- Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT & business topics through brief surveys - and earn cash http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV _______________________________________________ Linux-usb-users@lists.sourceforge.net To unsubscribe, use the last form field at: https://lists.sourceforge.net/lists/listinfo/linux-usb-users
