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[Néher Márton <neher.marton@xxxxxxxxx>]

I am using Ubuntu 14.04, and the problem is still present.

And I think this issue may start to gain relevance, since USB 3.0
attached SSDs are starting to appear, and BTRFS to check this parameter
for applying SSD mount option.

For me, the situation is what I described above, usb3 attached ssd, with
my system booting from it, and it is still considered to be rotational.

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https://bugs.launchpad.net/bugs/499237

Title:
  Doesn't detect usb flash drive as SSD

Status in The Linux Kernel:
  New
Status in “linux” package in Ubuntu:
  Incomplete

Bug description:
  I installed Ubuntu 9.10 on a 4G usb flash drive, performed updates as
  of 19 Dec 2009, and installed bootchart.

  The bootchart showed ureadahead as blocking the boot sequence while it
  did the readahead (Spinning drive style) instead of doing readahead in
  the background as I was expecting for a SSD.

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