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External USB Drive Copying very slow

 
Muhammad Farhan Nasir
Regular Advisor

External USB Drive Copying very slow

I have rx2660 and HP-UX 11.23 OS installed.
USB drive mount on HP-UX /usb mount point. but when i start copying on USB drive it's Copying very slow, 1GB in half hours.
5 REPLIES
Matti_Kurkela
Honored Contributor

Re: External USB Drive Copying very slow

Only HP-UX 11.31 has USB 2.0-capable drivers available:

https://h20392.www2.hp.com/portal/swdepot/displayProductInfo.do?productNumber=USB2

HP-UX 11.23 supports only USB 1.1, which is much slower: the maximum theoretical data rate is only 12 Mbits/s, or about 1.43 MB/s.

In practice, since the USB protocol is far from 100% efficient, the sustained long-term data rate can be even less than that: Wikipedia says the maximum effective transfer speed for USB 1.1 is about 7 Mbits/s, or about 880 KB/s.

Originally the USB drivers for HP-UX were designed to allow the use of USB keyboards and mice only, so the USB 1.1 driver implementation might not be as efficient as possible.

MK
MK
Muhammad Farhan Nasir
Regular Advisor

Re: External USB Drive Copying very slow

Said driver is up-ux11.3 i need 11.23,
please give another link
Torsten.
Acclaimed Contributor

Re: External USB Drive Copying very slow

Did you read the comment above?

11.23 can do USB 1.1 only.


Try to copy the DVD on your PC, than use FTP or whatever to transfer.

Hope this helps!
Regards
Torsten.

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those who understand binary, and those who don't.

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Muhammad Farhan Nasir
Regular Advisor

Re: External USB Drive Copying very slow

rx2660 USB is 2.0 A compateble 1.1,

can i check on rx6600 server?
Torsten.
Acclaimed Contributor

Re: External USB Drive Copying very slow

It's the same there, but the driver does only version 1.1 speed with 11.23.

There is a new USB 2.0 driver in 11.31.

Hope this helps!
Regards
Torsten.

__________________________________________________
There are only 10 types of people in the world -
those who understand binary, and those who don't.

__________________________________________________
No support by private messages. Please ask the forum!

If you feel this was helpful please click the KUDOS! thumb below!