>Mark Scheck wrote:
>> I moved 4.1 GB from my OpenSolaris laptop to a Kingston 8GB USB stick. Took
>> 3 1/2 hours the same
tranfer is 10-15 minutes on Linux and Windows. I looked it up and it seems the
its way OpenSolaris
/Solaris uses PCFS. Has anyone come up with a work around?
>>
>You may have the problem on PCFS which will try to zero every block
>before write down data
>and lose performance accordingly. But more details would be helpful,
>like the version of OpenSolaris
>and what's kind of 4.1GB data you tried in above case.
One if the things I have seen is that "pcfs" reads and writes each cluster
individually.
I recently bought a "Lexar Professional USB 2.0 reader" for CF and SDLC;
the Solaris box (Atom 230) can read from a modern UDMA capable CF card
at around 27MB/s. (That would cost around 2.5 minute to read the whole
card, 4GB; pretty much the same amount of data about)
But reading the same card though pcfs is MUCH slower; and the
same card only delivers 5MB/s through pcfs.
If I read the card with dd using a small block size, its performance
also becomes a lot less.
So pcfs needs a bit work, both in writing and reading (bigger blocks).
Test how quick the USB key is using dd with a 1MB block size.
What I think is that the following might be quicker:
- read the whole USB image (you need to do this once)
- mount the image using lofi
- copy the data
- unmount
- dd the image back to the flash drive.
While you still use pcfs, it might be quicker, depending on how much
memory you have.
Casper
