Adaptec 1520B User Guide - Page 9

Exiting SCSISelect To exit SCSISelect, press Esc until a message prompts you to exit (if you changed any host adapter settings, you are prompted to save the changes before you exit). At the prompt, select Yes to exit, then press any key to reboot the computer. Any changes you made in SCSISelect take effect after the computer boots. (If you are running SCSISelect from the floppy, be sure to eject the floppy before you re-boot.) Using the SCSI Disk Utilities To access the SCSI disk utilities, select the SCSI Disk Utilities option from the menu that appears after starting SCSISelect. Once the option is selected, SCSISelect immediately scans the SCSI bus (to determine the devices installed) and displays a list of all SCSI IDs and the devices assigned to each ID. When you select a specific ID and device, a small menu appears, displaying the options Format Disk and Verify Disk Media. s Format Disk-This utility allows you to perform a low-level format on a hard disk drive. Each hard disk drive must be low-level formatted before you can use your operating system's partitioning and file preparation utilities, such as MS-DOS fdisk and format. Most SCSI disk devices are preformatted at the factory and do not need to be formatted again. The Adaptec Format Disk utility is compatible with the vast majority of SCSI disk drives. Caution: A low-level format destroys all data on the drive. Be sure to back up your data before performing this operation. You cannot abort a low-level format once it is started. s Verify Disk Media-This utility allows you to scan the media of a hard disk drive for defects. If the utility finds bad blocks on the media, it prompts you to reassign them; if you select yes, those blocks are no longer used. You can press Esc at any time to abort the utility. SCSISelect Settings Basic Host Adapter Settings The following settings are the SCSISelect settings most likely to require any modification. s Host Adapter Interrupt (IRQ) Channel-This option sets the host adapter's IRQ. Each add-in card installed in your system, including the host adapter, must have a unique IRQ. In Plug and Play systems, the IRQ is set automatically. In non-Plug and Play systems you must set the IRQ manually. s Host Adapter SCSI ID- This option sets the host adapter's SCSI ID. We recommend that you set the host adapter to SCSI ID 7, which gives the host adapter the highest priority on the SCSI bus. s SCSI Parity Checking-This option determines whether the host adapter verifies the accuracy of data transfer on the SCSI bus. You should disable SCSI Parity Checking on the host adapter and all SCSI devices if any SCSI device connected to the host adapter does not support SCSI parity; otherwise, set it to Enabled. Most SCSI devices do support SCSI parity. If you are not sure whether a device supports SCSI parity, consult the documentation for the device. s Host Adapter SCSI Termination-This option sets termination on the host adapter. You can set it to Enabled, Disabled, or Automatic. Automatic works like this: - If the host adapter detects that a cable is connected to either its internal or external SCSI connector, then it enables its terminators (the host adapter is at the end of the SCSI bus). - If the host adapter detects that a cable is connected to both its internal and external SCSI connector, then it disables its terminators (the host adapter lies between the ends of the SCSI bus). We recommend that you set the host adapter to Automatic termination. AHA-1520B Installation Guide Part Number: 511162-00, Rev. A Page 9 of 16 Print Spec Number: 495339-00 Current Date: 5/30/96 Last Modified: May 30, 1996 3:43 pm File Location: n:\mario\1520b_ig.nec\1520b_ig.frm ECN Date: 6/11/95 AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA 9