Berkeley CSUA MOTD:Entry 26990
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2025/05/25 [General] UID:1000 Activity:popular
5/25    

2003/1/4-5 [Computer/SW/Apps/Media, Computer/HW/Drives] UID:26990 Activity:high
1/4     Is there a reason why a card reader (compact flash or smartmedia)
        would be limited to 1.5Mbps?  Is it a function of the media or
        something to do with the USB connection?  How does an iPod get
        around this limit?
        \_ maximum speed of USB 1.1 is 1.5 Mbps.  Firewire card readers exist.
           As for iPods: 1. they use Firewire, not USB. 2. they use HDDs, not
           flash.  What the heck are you talking about?
           \_ Maximum speed of USB 1.1 is 12 Mbps >> 1.5 Mbps.  I know
              that iPods use firewire; I asked because the hardware I'm
              talking about is a Microdrive (type II CF), which probably
              isn't dissimilar to a normal harddrive.  I'm basically
              wondering if I can achieve a higher throughput with a
              different cardreader (eg, with firewire), or if it will be
              the same because of a limitation in the compact flash spec.
              \_ iPod drives are generally faster than Microdrives but the
                 limiting factor is the limitation of USB. iPod's Firewire
                 connection runs at up to 400Mb/s while USB 1.1 only runs
                 at 12Mb/s (whole order of magnitude diff).
                 \_ I've seen some USB2.0 card readers, and the fastest
                    is 6MBps, which falls well short of the possible max
                    USB2.0 speed of 60MBps, so there's got to be an issue
                    with the card specification as well.
              \_ sorry, I misread (and meant) MBps, not Mbps.  Firewire CF
                 readers are faster, yes.
2025/05/25 [General] UID:1000 Activity:popular
5/25    

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