Acer Aspire T320 Aspire T320 Service Guide - Page 37
Parameter, Description, Option, IDE Secondary Master PIO
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OnChip IDE Device Parameter IDE Secondary Master PIO IDE Secondary Slave PIO IDE Secondary Master UDMA IDE Secondary Slave UDMA Description Setting these items to "Auto" activates the HDD speed auto-detect function. The PIO mode specifies the data transfer rate of the HDD. For example, mode 0 data transfer rate is 3.3MB/s, mode 1 is 5.2 MB/s, mode 2 is 8.3MB/s, mode 3 is 11.1 MB/s and mode 4 is 16.6MB/s. If your hard disk performance becomes unstable, you may manually try the slower mode. These items allow you to set the Ultra DMA 33/66/100 mode supported by the hard disk drive connected to your primary and secondary IDE connectors. Auto Mode 0 Mode 1 Mode 2 Mode 3 Mode 4 Option 30 Chapter 2