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For some reason Windows 8's Task Manager reports spikes of 99% disk activity for hours at a time. Looking at the entries in that column, however, data doesn't seem to be getting written any more quickly than when the disk activity is around 25-50% (which it seem to idle at most of the time).
Furthermore, when these 99% disk activity spikes are happening, the average response time reported in the Performance tab becomes 4000-6000ms.
Is there a good way to find out what is causing the disk activity? I've tried using Process Explorer, but I said above, the rate at which data is reportedly being written doesn't seem to correspond (Dropbox and Google Chrome are constantly the top two, but the spikes are not dependent on their being open).
Thanks in advance for any help. It gets very annoying when the computer stutters to a halt.
If the disk itself has an internal (read) error then these kinds of things can happen. Can you check SMART data and post the result of that here? – Hennes – 2012-10-28T22:37:51.790
1Resource Monitor has some more details about the disk activity of processes. – Louis – 2012-10-28T22:38:14.193
@Hennes: CrystalDiskInfo says there is a current Read Error Rate of 117 - would this explain the problem? – Jonathan Chan – 2012-10-28T22:39:33.910
@Louis: thanks - what should I be looking for in Resource Monitor, though? – Jonathan Chan – 2012-10-28T22:40:40.710
I am not familiar enough with CrystalDiskInfo to know what means with that. But if that value increases than I would check if my backups are up to date. – Hennes – 2012-10-28T22:41:27.417
@JonathanChan I'd try sorting by Total B/Sec, descending, and seeing which programs are making the disk so busy. – Louis – 2012-10-28T22:43:34.310
Louis, disk activity has (almost) nothing to do with throughput. – Joey – 2012-10-28T22:45:43.263
@Joey, It's like the only relevant column. – Louis – 2012-10-28T22:57:45.277
@JonathanChan I wonder if it is the indexing service. Disable "Windows Search" and stop the service from running in Windows Services, see if the disk activity stops. – Moab – 2012-10-28T23:20:21.643