Adaptec 1742A User Manual

Contents

The BIOS version and operation mode of the AHA-1740A/1742A/1744 appear at the top of the message, followed by alist of the identified SCSI devices.In the example shown, a SCSI fixed disk was found at SCSI ID 0and installed as drive C. No SCSI fixed disks were found at SCSIID 1. Drive C is also referred to as drive 80h with an interrupt of13, which is the software interrupt for disk I/O. If a second drivewere installed with a SCSI ID of 1, it would be referred to asdrive D or 81h. Drives 82h to 8Fh are not currently supported bythe adapter BIOS, so no search is made for other SCSI IDs (2through 6) as valid disk drives.Caution should be used when using the AHA-1740A/1742A/1744in standard mode, since a check is not made for the type of devicebeing installed. For example, if a SCSI tape drive is installed atSCSI ID 0, the AHA-1740A/1742A/1744 BIOS would install it asdrive C. This would not work, since the adapter BIOS is designedto work with SCSI fixed disks only (or removable media if themedia is not removed while the system is turned on).The adapter BIOS can also install removable media devices asdrive C or drive D. In general, this should not be done. The hostadapter BIOS does not support the removing of media, while thecomputer system is operating. If the media is removed while thecomputer system is operating you may experience data loss. Re-movable media (under DOS) should be installed with AdaptecASPI software.adaptec AHA-1740A/1742A/17446-2