pc-card disk thruput low why

[Pat LaVarre <p.lavarre@xxxxxxxx>]

I see only 2 MB/s in the latest Knoppix Linux (i.e. kernel 2.4.24, with
a 2.6.5 released promised soon), when asking `dd` to stream from the PC
Card disk drive of a friend.

Should I expect to see better in another laptop or another Linux?

How do I find settings to check?

I had hoped to see bursts of more like 17 MB/s after seeing `hdparm -I`
speak of 2/120 bytes/ns, as I do in desktop IDE.  Nothing in /proc/ide
tells my newbie eye that I've gone wrong in setup.  I'm told the disk
drive itself, when connected via a Hi-Speed USB adapter, delivers more
like 5 MB/s.

Pat LaVarre

P.S. Is throughput even an appropriate question for kernelnewbies?  If
not for here, then where?  Failed searches include:

http://lxr.linux.no/source/Documentation/ide.txt
http://lxr.linux.no/search?string=card+services
http://groups.google.com/groups?q=linux+pc+card+disk+throughput+low
http://groups.google.com/groups?q=linux+%22pc+card%22+disk+throughput+low
http://marc.theaimsgroup.com/?l=kernelnewbies&s=linux+pc+card+disk



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