[Bug 392204] Re: Huge CPU usage by mount.ntfs process

[W. Donks]

I was almost constantly getting ~95% CPU spikes from the mount.ntfs
process, according to 'top'. Disk fragmentation or big files (some files
as large as 16GB) were not causing the issue. Defragmentation of the
disk, using a Windows workstation, didn't change anything performance
wise whatsoever.

What fixed it for me was physically mounting the hard drive to a Windows
workstation and using CHKDSK. The disk wasn't damaged or anything but
apparently ntfs-3g causes 'free space marked as allocated' in both the
Master File Table (MFT) and volume bitmap. Once this is fixed the huge
spikes are gone. At least for me.

Hopefully this info can shed some light into the CPU spikes and help
some others who are having the same problem.

** Attachment added: "chkdsk.png"
   https://bugs.launchpad.net/ubuntu/+source/ntfs-3g/+bug/392204/+attachment/3586004/+files/chkdsk.png

-- 
You received this bug notification because you are a member of Ubuntu
Foundations Bugs, which is subscribed to ntfs-3g in Ubuntu.
https://bugs.launchpad.net/bugs/392204

Title:
  Huge CPU usage by mount.ntfs process

Status in NTFS-3G:
  New
Status in “ntfs-3g” package in Ubuntu:
  Confirmed

Bug description:
  While copying files from one ntfs partition to second ntfs partition
  process 'mount.ntfs' use 42 - 49% procesor resources (probably 100% on
  one core). Second 'mount.ntfs' process use 5% procesor time. (used
  'conky' for inspection)

  / and /home on first sata disk (ext4)
  file source on the second sata (ntfs)
  file target on third sata hdd (ntfs)

  Ubuntu 9.10 Alpha 1 (up-to-date)

  Athlon 2xCore
  nvidia 570 chipset

  ProblemType: Bug
  Architecture: i386
  Date: Thu Jun 25 19:11:54 2009
  DistroRelease: Ubuntu 9.10
  ExecutablePath: /usr/bin/nautilus
  NonfreeKernelModules: nvidia
  Package: nautilus 1:2.27.2-0ubuntu1
  ProcEnviron:
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  ProcVersionSignature: Ubuntu 2.6.30-9.10-generic
  SourcePackage: nautilus
  Uname: Linux 2.6.30-9-generic i686

To manage notifications about this bug go to:
https://bugs.launchpad.net/ntfs-3g/+bug/392204/+subscriptions