IBM Aptiva 2158 Hardware Maintenance Service

Also see for Aptiva 2158: Maintenance and service manual

16The IDE drive items are identified as follows:• IDE Primary Channel Master is attached to IDE connector 1 on the systemboard and is set as the master device. This is the hard disk that comespreinstalled with your computer.• IDE Primary Channel Slave (if installed) is attached to IDE connector 1 onthe system board and is set as the slave device.• IDE Secondary Channel Master (if installed) is attached to IDE connector 2on the system board and is set as the master device.• IDE Secondary Channel Slave (if installed) is attached to IDE connector 2on the system board and is set as the slave device. Normally, a preinstalledCD/DVD-ROM drive is connected here.NOTE: The CD/DVD-ROM drive information does not appear among theseoptions. Click on the System Information option in the Setup main menuto verify the presence of a CD/DVD-ROM drive.Proceed to the following for details on the parameters under each IDE drivesubmenu.Type This item specifies the number of cylinders, heads, and sectors, and thesize of a particular IDE drive. If no information appears opposite theparameters, there is no drive installed in that channel.Hard Disk Block Mode This function enhances disk performance dependingon the hard disk in use. BIOS automatically detects if your hard disk supportsthis feature.Setting to Auto allows data transfer in blocks (multiple sectors) to increase thedata transfer rate. If your system does not boot after setting this parameter toAuto, change the setting to Disabled. The default setting for this parameter isAuto.Advanced PIO Mode The advanced PIO mode feature improves systemperformance by allowing the use of faster hard disk drives. If your hard disksupports this feature, you may set this parameter to Auto (default), Mode 0,Mode 1, Mode 2, Mode 3, or Mode 4 depending on the hard disk requirements.See the documentation that came with the hard disk.If your hard disk does not support this function, set this parameter to Disabled.Hard Disk Size > 528MB This enhanced IDE feature works only under DOSand Windows environments. If set to Auto, which is the default, BIOS allowsyou to use a hard disk with a capacity of more than 528 MB. This is madepossible through the Logical Block Address (LBA) mode translation. You maybe required to set this parameter to Disabled if you use other operatingsystems.