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What are the specifics of SCSI under A/UX?

April 26, 2017SCSI specifics UX

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What are the specifics of SCSI under A/UX?

3 Answers

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SCSI under A/UX is SCSI-1/CCS and not SCSI-2. However, A/UX can use most SCSI-2 devices. Problems will arise on some SCSI-2 disks if their Error Correction Mode Pages are incorrect (See above). A/UX supports SCSI connect/disconnect which results in more efficient use of the SCSI bus. Finally, A/UX provides asynchronous I/O as well.

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SCSI under A/UX is SCSI-1/CCS and not SCSI-2. However, A/UX can use most SCSI-2 devices. Problems will arise on some SCSI-2 disks if their Error Correction Mode Pages are incorrect (See Q&A D.04). A/UX supports SCSI connect/disconnect which results in more efficient use of the SCSI bus. Finally, A/UX provides asynchronous I/O as well.

0

Posted

SCSI under A/UX is SCSI-1/CCS and not SCSI-2. However, A/UX can use most SCSI-2 devices. Problems will arise on some SCSI-2 disks if their Error Correction Mode Pages are incorrect (See Q&A D.04). A/UX supports SCSI connect/disconnect which results in more efficient use of the SCSI bus. Finally, A/UX provides asynchronous I/O as well. D.21) I can’t get my LaserJet 4M to work reliably. Help! Bad news… for some reason, if the LaserJet is connected _directly_ to a Q700 running A/UX via AppleTalk then it won’t work. If you have a router or something similar between the two it’ll work like a hose. It looks like it’s most probably a 4M ROM bug and I hear that HP is “working” on a fix.