Tyan Computer GX21 Primary / Secondary Master/ Slave PIO, Primary / Secondary Master/ Slave UDMA

Models: GX21 B5102

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Primary / Secondary Master/ Slave PIO

The four IDE PIO (Programmed Input / Output) fields let you set a PIO mode (0-4) for each of the four IDE devices that the onboard IDE interface supports. Modes 0 through 4 provide successively increased performance. In Auto mode, the sys- tem automatically determines the best mode for each device. The choices are:

Auto / Mode 0 / Mode 1 / Mode 2 / Mode 3 /

Mode 4

Primary / Secondary Master/ Slave UDMA

This option allows you to select the mode of operation for the Ultra DMA/33 implementation. This is possible only if your IDE hard drive supports UDMA and the operating environ- ment includes a DMA driver (Windows 95 OSR2 or a third- party IDE bus master driver). UDMA (Ultra DMA) is advanced technology that provides for even faster throughput, up to

33.3MB/s in UDMA mode 2 and 66.7 MB/s in UDMA mode 4, twice to four times that of EIDE, for much lower prices than SCSI. Many new computers come with large UDMA drives and UDMA interfaces, and it's possible to add a UDMA inter- face card (such as the Promise Ultra33 or Ultra66) to an existing system to boost speed, even on older non-UDMA drives. If your hard drive and your system software both sup- port Ultra DMA/33, select Auto to enable BIOS support. The choices are:

Auto / Disabled

On-Chip Serial ATA

The integrated peripheral controller contains a S-ATA inter- face with support for two S-ATA channels. Serial ATA is a point-to-point connection and allows multiple ports to be aggregated to a single controller typically located either on the motherboard or an add-in RAID card. Through back- planes and external enclosures, Serial ATA can be deployed in high-capacity server and networked-storage environments. Serial ATA technology can deliver 1.5 Gbps (150 MB/sec) to each drive within a disk drive array. Select “Enabled” to acti- vate each channel separately. The choices are:

Enhanced Mode / S-ATA Only

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Tyan Computer GX21 Primary / Secondary Master/ Slave PIO, Auto / Mode 0 / Mode 1 / Mode 2 / Mode Mode, Auto / Disabled