Results 1 to 2 of 2

Thread: Installing ubuntu on USB 3.0 External SSD

  1. #1
    Join Date
    Oct 2012
    Beans
    1

    Lightbulb Installing ubuntu on USB 3.0 External SSD

    As we know, Solid state drives are much quicker compared to normal HDDS when it comes to transer of data.

    If i were to install a ubuntu on a usb 3.0 External ssd, then boot it from my boot menu in my bios, would I be able to take advantage of the fast speeds that SSD can provide?

    I mean, the SSD is connected through the usb 3.0 connection - which is a minor bottleneck - but in theory, i should be able to get significantly greater speeds then if i were to install it on my HDD?

  2. #2
    Join Date
    Jun 2009
    Location
    Chicago Suburbs
    Beans
    Hidden!
    Distro
    Ubuntu 14.04 Trusty Tahr

    Re: Installing ubuntu on USB 3.0 External SSD

    Depending on SATA2 or SATA3 hard drive will be faster. And some discuss theory and others mention a more practical number so I do not have total consistency in my notes.

    SATA II - 3.0 Gbit/s
    SATA revision 3.0 (SATA 6 Gbit/s)

    Mb/s or MB/s? USB 2.0 tops out at 480Mbps, which is about 50MB/sec.

    http://en.wikipedia.org/wiki/USB2
    The theoretical maximum data rate in USB 2.0 is 480 Mbit/s (60 MB/s) per controller
    http://en.wikipedia.org/wiki/USB3#USB_3.0
    SuperSpeed (USB 3.0) rate of 4800 Mbit/s (~572 MB/s).
    But speeds are more limited by devices at each end.

    My SSD is a low cost OEM version, I have seen newer ones rated twice mine.

    SSD speed
    fred@fred-Precise:~$ sudo hdparm -t /dev/sdd4
    /dev/sdd4:
    Timing buffered disk reads: 626 MB in 3.01 seconds = 208.20 MB/sec
    Older 160GB rotating drive:
    /dev/sdb4:
    Timing buffered disk reads: 212 MB in 3.01 seconds = 70.46 MB/sec
    For info on UEFI boot install & repair:
    http://ubuntuforums.org/showthread.php?t=2147295
    Please use Thread Tools above first post to close thread when/if answered completely.







Tags for this Thread

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •