Monday, January 28, 2008

Windows degraded performance due to PIO IDE channel mode

One day you feel your computer becomes slower. Adding RAM won't help.
There may be many different reasons: one of them is - IDE channel serving your IDE ATA or ATAPI disks is running in PIO mode instead of DMA.
Symptoms: start Process Explorer (made by ex-Sysinternals, nowadays Microsoft guys Russinovitch & Co. ) and monitor CPU usage. If you see, that "Interrupts" pseudo-task is using significant - over 30% - CPU time, follow the MS Knowledge Base article

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