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Partition Magic - Changed cluster size, drive won't boot.

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by pablito9 1 view

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I used Partition Magic to change the cluster size on my boot partition (C:) from 4k to 16k. Drive will now not boot, but computer boots with a windows xp boot disk. I have done this on other computers and they either booted right up after the change, or booted after I ran chkdsk /f. I have run chkdsk several times. When I try to boot from the hard disk, I get a "Disk Read Error." This happened before, and I used Partition Magic to reset the cluster size to 4k, and the drive booted. The only difference between my computer and the other computers is that my computer has a SATA-II drive (supported by the MB bios with no additional drivers needed) but the other computers have ordinary IDE drives.

3 replies

by gdf01

I have a large external hard drive and thought I'd get some performance improvement by changing cluster size.
All I got was a drive that won't mount, thanks to PM8.
I was able to use the browse utility under PM and move the data to a second external hard drive - slooooow process - and then reformt.
It's Acronis or Perfect Disk for me from now on!

by runfree0

Go into boot mode (power up whilst pressing: f11, or "del" etc.) and change sata drive from ancpi or such like to IDE. This also occurs when you plug a usb drive into a usb port when on low power,it will crash your computer completely!

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