That is a Toshiba SATA hard drive 160Gb
Model MK1255GSX / MK1655GSX / MK2555GSX / MK3255GSX / MK4055GSX / MK5055GSX Formatted capacity 120GB / 160GB / 250GB / 320GB / 400GB / 500GB Number of platters 1 / 1 / 1 / 2 / 2 / 2 Number of heads 1 / 2 / 2 / 4 / 4 / 4 Sector Size 512Bytes Average Latency Time 5.55msec Interface SATA (SATA Specification Rev. 2.6) Interface transfer rate to Host 3.0GB/sec Buffer 8MB Rotational speed 5,400rpm Average seek time 12msec Power Supply +5V(+/-5%) Spin-up (Max.) 4.5W Read/Write (Typ.) 1.4W Stand-by (Typ.) 0.18W Sleep (Typ.) 0.13W External dimensions (WxDxH; mm) 69.85 x 100 x 9.5 Weight (max.) 98g Temperature - Operating 5 to 55˚ C Acoustics - Idle 19 dBA / 19 dBA / 19 dBA / 25 dBA / 25 dBA / 25 dBA Acoustics - Seek 20 dBA / 20 dBA / 20 dBA / 25 dBA / 25 dBA / 25 dBA
Therefore, it is NOW clear from your post of the regsitry key and my check with the Toshiba site that the DMA/PIO is nothing to do with this drive.
The web is peppered with reports of the Acer Aspire One including the D250 having the problems you mention with the audio and even the Acer Support forum
deals with such matters.
The DMA/PIO setting is COMPLETELY unconnected with this hard drive.
The problem it therefore appears is either, the install of the drivers or, more seriously something connected with the original BSOD and the reason for the reinstall.
To complicate the issue further TOSHIBA are one of the few manufacturers that do not provide a checking utility for their hard drives. Therefore we are restricted to the Windows chkdsk and generic utilities.
In connection with that please WHEN we have made some progress with the SFC, there is a way to negate the need for the CD, please download and run this
to further check the hard drive
Edited by Macboatmaster, 13 September 2011 - 10:40 AM.