Is there anybody, who knows a PC card for USB2.0 port working with PowerBook G4 Titanium? Also, how often I have to use an external power supply to use a PC card for USB 2.0?
Yes, I have the Belkin model that immediately preceeded that one. No drivers requried and although the Power Supply is included you don't need it for many devices.
A while back you posted about the problems you had using the
ADS Tech USB 2.0 Cardbus card. I'm now in a similar situation.
Did you have any luck resolving your issue? Or find another card that worked?
I just got an ADS Tech USB Turbo 2.0 so as to be able to plug a video iPod into a TiBook (667 MhZ, 512 MB RAM, OS 10.4.2), and have had similar
problems. The iPod is recognized about 20% of the time only, and even then,
it often stops being recognized; iTunes and the Finder freeze; and I get
kernel panics. No regular pattern to all this, except that things don't work,
and I know the TiBook, iPod, and cable are all fine.
ADS Tech support has so far not been able to offer a solution.
Although it seems that this card would work, it does not either. I have this card, as well as a keyspan USB 2 card.
i have used both in my TiBook. Both with the power supply attached to the cards.
If I attach my usb 2 drive to either card, the drive mounts at first, but will then unmount itself.
(Running Tiger on the TiBook, so the support for it should be in the OS)
i just got the belkin usb 2.0 pc card too and it doesnt seem to be running at full speed when i attach my digicam to it. other than plugging in the card and the ac adapter, is there anything else i need to do to get the full usb 2.0 speed?
so it seems that usb2.0 is working ok with my external drive, but im still wondering why my camera which is usb2.0 wont transfer files at the higher speed. i have a panasonic lumix dmc-fx01 digicam
Hi, tibookg4. The rate of data transfer from your camera may be limited by the capabilities/design of the camera itself, not the USB2 adapter card. I think this is especially likely if you get noticeably higher transfer rates from a hard drive than you do from the camera; that indicates that the card isn't a bottleneck. If the camera simply can't push data as fast as you'd like, there won't be anything you can do about it, short of replacing the camera.
Afterthought: The camera may only be equipped with USB 1.1, which allows data transfer only about 1/30 as fast as USB 2 in real life. The slowest device involved in a data transfer always controls the maximum transfer rate.
i checked the specs and it said that the camera has usb2.0 full speed. does anyone know why the camera wouldnt connect at full speed even though it is usb2.0 capable?
Any other USB devices that are connected at the same time as the camera can slow things down, particularly if they're in use. This is a major drawback of USB, as compared to FireWire. Just as a cable internet connection's transfer rate slows down when everyone else in the neighborhood is using theirs, a heavily-populated USB bus slows down when, for example, you have a keyboard, mouse, printer, external HD and camera all working at once. The external HD will have by far the greatest impact - and will most noticeably affect the camera. So disconnect the hard drive and whatever else you can when you're downloading from the camera, if possible.
The other thing is that while the camera may be designed to transfer data much faster than USB 1.1 if it's connected to a USB 2 bus, it may still not be capable of doing so at USB 2's maximum theoretical speed - which is seldom achieved in real life by any device.
USB 2 has been greatly over-hyped. Under most real-world circumstances, FireWire 400 (let alone FireWire 800) is faster and more reliable than USB 2.
Out of curiousity, I took a couple of times. With my 256MB memory stick in the native USB port on the PB, it took 330s to move a folder of 200 pictures, totalling 115MB, from the PB to the memory stick. I moved the memory stick to the USB port on the PCMCIA card and the same set of files took 192s. Copying a single large file (148MB) was of course faster, at 270s on USB1.1, and 102s on the USB2 port.
Hi, Austin. Interesting results. You don't say whether your flash drive itself is USB 2 or USB 1.1, though, and that would be useful to know.
If it's USB 2, then your results clearly demonstrate that in the real world, USB 2 is seldom all those dozens of times faster than USB 1.1 that you heard about in the hype for USB 2: your transfers were less than twice as fast in one case and less than three times faster in another, when using a USB 2 port. It may be that the flash drive's transfer speed is inherently limited by the chips used in it to less than USB 2's theoretical maximum, in much the same way I suggested that tibookG4's camera may be inherently limited.
i usually have the external drive connected to the firewire port(usb2&firewire compatible), and it usually isnt on so it should have no affect on the speed anyway. the camera is the only hardware attached to the usb2.0 card. i also have the ac adapater attached so power should not be an issue.
when i connected my drive to the usb2.0, it seemed as fast if not faster than being connected to the firewire port. i'll have to do a test later and check that out.
I'll just chime in as I have the same hardware and agree that USB2 is well overhyped. I've bearly used the card since I posted above as Firewire is far far better.
