Hans Petter Selasky wrote: > On Thursday 23 July 2009 04:38:35 Drew Tomlinson wrote: > >> I have a USB 2.0 external drive that's formatted as NTFS under Windows >> XP. I've plugged it into my 8.0 BETA2 install and am copying files to a >> local raid1z zpool with one vdev consisting of 4 drives. I'm trying to >> move about 100 GB of assorted files and have been at it all day. The >> USB drive contains assorted files such as mp3, CD/DVD images, zip, >> documents, etc. I'm guessing most files range between 1 - 4 MB with >> some as large as 4 GB. >> >> Anyway, iostat shows the transfer rate at around 2 - 3 MB per second. >> Is this all I should expect from a USB 2.0 drive? Is there anything I >> can do to speed this up? >> > > Hi, > > Benchmark your device like this: > > dd if=/dev/daX of=/dev/null bs=65536 > > It will give you the correct transferrate number. > Thanks. When using your suggestion, iostat shows rate at almost 34 MB per second which seems reasonable. When copying a large file to /dev/null as suggested by Erich Dollansky, I get right around 10 MB per second. So does that mean that it's the NTFS driver that's causing the slowing? > Maybe there are some utilities in /usr/ports that can read NTFS faster than > the kernel NTFS driver. > Maybe I'll have a look at /usr/ports/sysutils/fusefs-ntfs as suggested by Gary Jennejohn. Thanks, Drew -- Be a Great Magician! Visit The Alchemist's Warehouse http://www.alchemistswarehouse.comReceived on Thu Jul 23 2009 - 20:07:40 UTC
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