andy@BRL.MIL ("Ronald D. Anderson", IBD) (06/14/91)
ajp2o@crocus.medicine.rochester.edu (Anthony J. Persechini) writes: | O.K. I looked in the system administrator's guide under "disk and cartridge | tape devices" and find no discussion of cartridge tape devices. So | perhaps some kind soul can give me a hand. I recently installed | a new WREN 380 meg disk, which seemed to want to be in the | bottom slot of my 4D20G (under 3.3.1). This necessitated moving the tape drive | to the upper one. I now cannot figure out how to get it working. | It appears that the machine cannot find it; shouldn't it | have found it automatically on boot up? Perhaps the problem | is the way the tape drive is jumpered. Any suggestions, especially | from those who have dealt with this problem would be | appreciated greatly. when the field engineer put our scsi tape drive in the top slot, he had to file down the button that defines the drive number (a small plastic finger on the rear upper part of the tape drive chassis). seems that the tower chassis doesn't have quite enough room for the drive to be pushed in, and this little finger gets squeezed during the process. since this button is a two-position (?) switch for defining the tape address, once it gets set to the wrong mode then the tape drive is unrecognizable to the sgi o/s. try removing the drive to see whether this address switch is still in the original mode as when you inserted it into the tower. -andy@brl (no long descriptive narrative)
olson@anchor.esd.sgi.com (Dave Olson) (06/15/91)
In <9106140830.aa01622@IBD.BRL.MIL> andy@BRL.MIL ("Ronald D. Anderson", IBD) writes: | when the field engineer put our scsi tape drive in the top slot, he had to | file down the button that defines the drive number (a small plastic finger | on the rear upper part of the tape drive chassis). seems that the tower | chassis doesn't have quite enough room for the drive to be pushed in, and | this little finger gets squeezed during the process. since this button | is a two-position (?) switch for defining the tape address, once it gets | set to the wrong mode then the tape drive is unrecognizable to the sgi o/s. | try removing the drive to see whether this address switch is still in the | original mode as when you inserted it into the tower. Sorry, but this doesn't make any sense. The jumper blocks that set the ID are recessed, and do not extend past then end of the drive, for all the supported drives (some, like the 8mm drives have dip switches, but they don't extend past the drive chassis either). I think the plastic fingers you are talking about are simply the guide bars; I'm surprised to hear of this, but it has NOTHING to do with the drive ID. (There are little tiny fingers on the switch mentioned below, but no way could they not fit, unless someone badly bent some sheet metal.) Some of the newer drives shipped out do indeed have a switch on the sheetmetal we attach to the drive, and these unfortunately can be changed all too easily when inserting the drive, but are not in a position where they would prevent the drive from being inserted.