Korg pa3x usb maximum capacity

Discussion relating to the Korg Pa3X Arranger.

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neverkorgagain
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Post by neverkorgagain »

What is maximum write/read speed that pa3x supports?

And also does anyone tested that usb flash memory whats inside keyboard?
I was planing to change it for some with bigger capacity in few days... just to be shure to buy optimal for r/w capability....
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AntonySharmman
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Post by AntonySharmman »

Pa3X uses USB2 protocol that like USB1 is semi-duplex and also used in HD port (HD converter board to USB2)
the same is valid for internal flash drive of 61 keybed in HD role (the shipped is slow).
Theoretically reading speed should be at around 30Mb/sec (480 Mbit/s standard protocol) and writing speed just
the half , but when measured with monolithic files & HD , it was about 20 Mb/sec maximum (too slow).
Common old USB2 thumb drives never exceeded 8 Mb/sec and the maximum calculated speed I've got , using
an USB2/3 128Gb Sundisk extreme , was 22/18 Mb/sec reading/writing speed !
Also note that transfer speed is seriously determined by number & size of files !

hope this helps
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Keyboards : Steinway-D, Kronos X, Pa5X 76, Pa4X 76, Montage M7 , Roland-XV88, Emu3,Emax II, Synclavier II , Yamaha DX Series, ΟΒ-8V

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neverkorgagain
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Post by neverkorgagain »

Tommorow i gonna swap internal usb flash (korg hdd disk) and do a measure for both usb drives.... factory one and the new one.....
somebody told me that keyboard loads quite faster if u change usb stick for faster one....
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AntonySharmman
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Post by AntonySharmman »

neverkorgagain wrote:somebody told me that keyboard loads quite faster if u change usb stick for faster one....
Correct , already mentioned () :wink:
Music Conductor - Sound Engineer & Developer - Automotive SMPS/RF R&D - Electronics Engineer
Keyboards : Steinway-D, Kronos X, Pa5X 76, Pa4X 76, Montage M7 , Roland-XV88, Emu3,Emax II, Synclavier II , Yamaha DX Series, ΟΒ-8V

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neverkorgagain
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Post by neverkorgagain »

I skipped that lesson at class :lol:

Well, the results are next..... korg has installed some 2gb usb stick....

measured with 3 different programs.....

korg 2gb smi usb --- just 17 MB/ sec

so i found some old 4gb usb that is also on usb 2.0 protocol but read speed is over 30 MB/ per sec..... and instaling in my pa3 this moment :D

i just wonder on what limit korg set up adressing per block in pa3x.....
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