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carbonated
n00b
Joined: 17 Nov 2004
Posts: 11
Location: Denmark
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 Posted: Thu Jun 23, 2005 1:57 pm Post subject: PowerBook G4 usb1.1 - what speed to expect? |
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I have just found out that my PowerBook only supports usb1.1 -ohci- (it's a 17" 1Gz),
so no wonder i've been unable to activate usb2.0 -ehci-.
I get ~700KB/s writespeed to a cruzer-mini-key, is that really all i can hope for??
A little info
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GentooG4 ~ # lspci -v
0001:10:18.0 USB Controller: Apple Computer Inc. KeyLargo/Intrepid USB (prog-if10 [OHCI])
Flags: bus master, medium devsel, latency 16, IRQ 27
Memory at a0002000 (32-bit, non-prefetchable)
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GentooG4 ~ # dmesg
usb 1-1: new full speed USB device using ohci_hcd and address 3
scsi1 : SCSI emulation for USB Mass Storage devices
usb-storage: device found at 3
usb-storage: waiting for device to settle before scanning
Vendor: SanDisk Model: Cruzer Mini Rev: 0.2
Type: Direct-Access ANSI SCSI revision: 02
SCSI device sda: 2001888 512-byte hdwr sectors (1025 MB)
sda: assuming Write Enabled
sda: assuming drive cache: write through
SCSI device sda: 2001888 512-byte hdwr sectors (1025 MB)
sda: assuming Write Enabled
sda: assuming drive cache: write through
/dev/scsi/host1/bus0/target0/lun0: p1
Attached scsi removable disk sda at scsi1, channel 0, id 0, lun 0
usb-storage: device scan complete
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GentooG4 ~ # lsmod
sd_mod 17232 0
usb_storage 37568 0
scsi_mod 105408 2 sd_mod,usb_storage
ohci_hcd 26280 0
usbcore 140112 3 usb_storage,ohci_hcd
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quatsch
Tux's lil' helper
Joined: 24 Apr 2005
Posts: 104
Location: New York, NY
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| Posted: Thu Jun 23, 2005 5:12 pm Post subject: |
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| writing to those usb sticks is very very slow whether or not u have usb2 support. Reading is faster. I can get up to about 10MB/sec if I read very large amounts of data (for small files, it's very slow). with usb1.1, under ideal circumstances, you'd get 11Mbit/sec which is about 1.25MB/sec. You'll never get this fast so 700KB/sec seems pretty good to me. |
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