On 1/16/06, Iain Buchanan <[EMAIL PROTECTED]> wrote: > On Mon, 2006-01-16 at 06:40 -0700, Richard Fish wrote: > > On 1/15/06, Iain Buchanan <[EMAIL PROTECTED]> wrote: > > > Hi all, > > > $ sudo hdparm -tT /dev/sdd > > > > > > /dev/sdd: > > > Timing cached reads: 3640 MB in 2.00 seconds = 1820.28 MB/sec > > > Timing buffered disk reads: 30 MB in 3.13 seconds = 9.60 MB/sec > > > > > > 9.6 is pretty slow! I should be able to get at least double that... > > actually, I should be able to get 4x that...
No, you won't. The max I've ever seen any USB drive run at is about 30MB/sec, even when the same drive installed internally will run at 65MB/sec. My best 2.5" case and drive will pump about 25MB/sec. > > Please post the dmesg output from plugging in the drive. > > Note, there are 4 LUNS on this device, the first 3 are card readers ,so > they show with no media (no drive or partitions), the fourth (sdd) is > the ide drive. Ok, I've never used one of these combination devices. I'm a little concerned, because the maximum throughput of most media readers is about 10MB/sec...so hoping this is not a limitation of the chipset. > relevant dmesg: Looks normal... > sdd: sdd1 sdd2 sdd3 sdd4 < sdd5 sdd6 sdd7 sdd8 sdd9 sdd10 sdd11 > Damn, and I thought I made a lot of volumes.... ;-> > $ zgrep USB /proc/config.gz | grep -v "^#" > CONFIG_USB_IRDA=m > CONFIG_BT_HCIUSB=m > CONFIG_BT_HCIUSB_SCO=y > CONFIG_BT_HCIBFUSB=m > CONFIG_USB_ARCH_HAS_HCD=y > CONFIG_USB_ARCH_HAS_OHCI=y > CONFIG_USB=m > CONFIG_USB_DEVICEFS=y > CONFIG_USB_EHCI_HCD=m > CONFIG_USB_UHCI_HCD=m > CONFIG_USB_PRINTER=m > CONFIG_USB_STORAGE=m I think you need to turn on some of the options under USB Mass Storage support. Particularly CONFIG_USB_STORAGE_FREECOM=y but I don't think there is any harm in turning all of them on...it is very likely that one of these will give you the best performance. -Richard -- gentoo-user@gentoo.org mailing list
