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[Bug 268588] Re: Disk I/O is very slow, system freezes for seconds


[Expired for linux (Ubuntu) because there has been no activity for 60

** Changed in: linux (Ubuntu)
       Status: Incomplete => Expired

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  Disk I/O is very slow, system freezes for seconds

Status in “linux” package in Ubuntu:

Bug description:
  For a while (even with previous ubuntu versions as well), speed of
  disk I/O is unacceptable. I thought it is a problem with my machine,
  but I have a quite different machine with the same problem now, and
  also it was quite OK a year (or years?) ago. Even installing a single
  deb package with dpkg lasts for minutes, other processes trying to
  access of disk are totally "dead", a single ls command in a terminal
  can wait for a minute sometimes. Also, sometimes the mouse cursor
  can't be moved for long seconds. There is nothing suspect in kernel
  log which can help. During disk I/O top reports wait state for almost
  all CPU time. Can it be caused by the pata->libata change for example,
  NCQ or something like this? I have no idea how to improve the
  situation. I can provide information of course if I know what I should
  send. Currently these are machines running up-to-date Ubuntu hardy (32
  bit). I can say system is totally unusable even with smaller disk I/O
  load ...  Thanks in advance!

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