Advertisement
If you have a new account but are having problems posting or verifying your account, please email us on hello@boards.ie for help. Thanks :)
Hello all! Please ensure that you are posting a new thread or question in the appropriate forum. The Feedback forum is overwhelmed with questions that are having to be moved elsewhere. If you need help to verify your account contact hello@boards.ie
Hi all! We have been experiencing an issue on site where threads have been missing the latest postings. The platform host Vanilla are working on this issue. A workaround that has been used by some is to navigate back from 1 to 10+ pages to re-sync the thread and this will then show the latest posts. Thanks, Mike.
Hi there,
There is an issue with role permissions that is being worked on at the moment.
If you are having trouble with access or permissions on regional forums please post here to get access: https://www.boards.ie/discussion/2058365403/you-do-not-have-permission-for-that#latest

Inconsistent file copying speeds across USB devices.

  • 14-01-2011 9:02pm
    #1
    BrokenArrows
    Registered Users, Registered Users 2 Posts: 7,498 ✭✭✭


    Over the past few days on multiple pcs i have had to copy a large amount of data from computer harddrives to a usb harddrive.

    I cant understand why the speeds vary so much on the same pcs with the same harddrive.

    eg. I start to copy a 12GB file. and the speed starts at 30MB/s and might drop to 5MB/s. If i cancel the transfer and start again it might maintain a constant 20MB/s or it might transfer slower or faster.
    The computers are not performing any other task other than copying.

    This happens on multiple pcs and multiple USB harddrives.

    Any idea how to improve consistency?


Comments

  • #2
    Khannie
    Registered Users, Registered Users 2 Posts: 37,485 ✭✭✭✭Khannie


    The consistency isn't an issue with the drive. The OS buffers the write in memory somewhat (this is the fast bit, but it's not actually writing at that speed). When that buffer is filled it is forced to actually wait on the disk to flush (this is where you're seeing the drop off). There's no way around this that I'm aware of. On linux you can force a disk flush with the "sync" command. Not sure if there's an equivalent on windows.


Advertisement