Adaptec 2920C User Guide - Page 11

Common Problems and Solutions s Boot From SCSI Disk Fails-If you are booting from a SCSI hard disk drive, make sure the Drives setting in your computer's Setup program that corresponds to the drive is set to None or No Drives Installed, as required for SCSI hard disk drives. s Changed Values Not Loaded-If you changed any values on the host adapter in a Setup program or on a SCSI device, did you turn the power off and on to ensure that the new values are loaded? s Computer Will Not Boot from a SCSI Disk Drive- If you have a combination of SCSI and non-SCSI disk drives, then the non-SCSI disk drive is always the boot device. If the system has only SCSI disk drives, do the following: 1 Make sure the drive type in your computer's CMOS setup is set to No Drives Installed. 2 Make sure the boot hard disk SCSI ID corre- sponds to the Boot SCSI ID setting under SCSISelect settings (see page 8). The SCSI ID is normally set with jumpers or switches on the drive. 3 If this does not solve the problem, back up all data on the SCSI hard disk and perform a low-level format with the SCSISelect Format Disk option. See the MS-DOS documentation for instructions on partitioning the disk after formatting. s Format/Verify Disk Device Utility Startup Fails-If you tried to use the Format/Verify utility on a disk device and got an Unexpected SCSI Command Failure pop-up box with error information, the utility probably encountered a problem with the disk device or the media and therefore cannot run. You can probably determine from the Sense Key information (e.g., 06h - Unit Attention) both the cause of the problem and its solution. Listed below are some of the more common Sense Key values and their meanings: 02h - Not ready-The media is not ready to format. Be sure that media is inserted in the drive and that the media is spun up. 03h - Medium error-The disk media may be defective. If it is a removable-media drive, try using a different disk media. If it is a hard disk drive, the disk may be physically damaged. 04h - Hardware error-The disk drive may be defective. Consult the hardware documentation and contact the manufacturer. 06h - Unit attention-The removable media may be write-protected. Disable write protection and run the utility again. s BIOS Initialization Fails-If the host adapter BIOS is enabled but fails to initialize, the system may display one of the following error messages followed by a BIOS Installation Failure message. - Device connected, but not ready. The host adapter received no answer when it requested data from an installed SCSI device. Run the SCSISelect utility and enable the Send Start Unit Command for the device. If the message still appears, follow the drive manufacturer's instructions to make sure the drive is set to spin up when the power is switched ON. - Start unit request failed. The BIOS was unable to send a Start Unit Command to the device. Run the SCSISelect utility and disable the Send Start Unit Command for the device. - Time-out failure during... An unexpected time-out occurred. Check the SCSI bus termination. Then disconnect the SCSI peripheral cables from the host adapter and start the computer. If the computer successfully restarts, check the SCSI bus termination and cable connections. One of the devices on the SCSI bus may be defective. Reconnect one device at a time to isolate the problem. 11