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Windows 7: Latency issues on E-SATA drive, caused by SCSIPORT.SYS driver??

15 Nov 2011   #1

Windows 7 Home Premium x64
Latency issues on E-SATA drive, caused by SCSIPORT.SYS driver??

I have a problem with intermittent, brief freezes and sound looping, lasting about a second, which I have pinned down to latency issues caused by drivers used by a Freecom E-SATA drive and/or the JMicron controller on my Asus P8P67 motherboard that it's connected to. It's very annoying when listening to music, streamed audio or video, and when gaming. According to LatencyMon software, the cause is the SCSIPORT.SYS driver. I've tried updating all the motherboard drivers to no avail, but have confirmed this disk is the problem since it doesn't occur when I disconnect this drive, or when I connect it via USB instead of E-SATA. The problem occurs once or twice an hour even when the disk is idle, and since mainly the disk is only in use for about 30 minutes per day doing an incremental backup, I wondered what Windows processes are communicating with the drive when it's idle, and whether there is any possibility to switch these off? I expect this is a long shot and I may be barking up the wrong tree, but if anyone has any suggestions I'd be very interested to hear them, or any alternative solutions. It's not a major issue now since I have found a workaround, but I'd like to take advantage of the speed of E-SATA if possible. Thanks!

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 Latency issues on E-SATA drive, caused by SCSIPORT.SYS driver??

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