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Non-stop backup blocking IO

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Has anybody else noticed that Non-stop backup blocks IO in the first few minutes after a boot?

When I start windows, when Non-stop backup starts up my IO on my computer goes through the floor, and bottlenecks at 4MB/s. Making the computer *sloooow* while NSB does whatever it is it's doing.

If I turn of NSB I get 90MB/s and my computer works as you would expect... fast.

Anybody else have a similar problem? What's so hard about the application working transparently in the background? Without effecting the user?

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@pro-logic

Yes I have reported on many occasions that ATIH's I/O is set at normal and in W7 Resource monitor you can see that system disk I/O is 100% until NSB completes (says its started). In my case anything up to 20-30 minutes. Don't hold your breath on this one its been two years since I reported this!

It might be designed not to hog CPU but it certainly hogs disk.

Maybe the design is to do poor I/O management so that the CPU is not saturated ha. ha.

Yeah, annoyingly Windows 7 (and Vista) comes with IO priorities, where you can set the IO priority to 'low' if you use an application like Process Explorer, however even if I do this it's still really slow. I suspect that NSB actually blocks, in the true sense of the word, any attempt by applications to access the disk until it's done, which is why while NSB is doing it's thing IO is only 5MB/s and not 90MB/s.

Might I also suggest that ATIH and NSB use the USN Journal instead of hitting the entire HDD? I realise most suggestions on this forum go to /dev/null/ but I don't want to open a pay per incident to file a bug.