is@athena.cs.uga.edu (Bob Stearns) (02/19/91)
A friend of mine bought one of these Archive 2150S tape drives and it came without documentaion (bless mailorder). We now need to change the LUN for this drive. If you have the documentation and can describe the various jumpers and their functions, please either E-mail me or reply here. I read this newsgroup religiously, but I suspect that this information is sufficiently arcane that most of the group could care less about it.
norcott@databs.enet.dec.com (Bill Norcott) (02/20/91)
In article <1991Feb19.151132.1080@athena.cs.uga.edu>, is@athena.cs.uga.edu (Bob Stearns) writes... >A friend of mine bought one of these Archive 2150S tape drives and it came >without documentaion (bless mailorder). We now need to change the LUN for >this drive. If you have the documentation and can describe the various >jumpers and their functions, please either E-mail me or reply here. I read >this newsgroup religiously, but I suspect that this information is sufficiently > ------------------------------- >arcane that most of the group could care less about it. >------ Happy to be able to supply some arcane knowledge. The information here is from the Archive Corp. "Theory of Operation and Maintenance Manual". Order from Archive Corp 1650 Sunflower Ave Costa Mesa, CA (714) 641-1230 I have a photocopy of a few pages from the manual, and the info seems to be accurate. I think the manual costs $35. The jumpers for the Archive Viper 2150S streaming tape drive are located on the left side of the drive (as seen from the back), just under the power connector. The power connector is the standard female type connector which accepts a four pin plug from the power supply. The view from the rear of the drive is something like this: ------------------------------------------------- | | | PPPPPP TTTTTTTT TTTTTTTT TTTTTTTT | | JJJJ SSSSSSSSSSSSSSSSSSSSSSSSSS | ------------------------------------------------- P = power connector J = jumpers S = 50 pin SCSI interface connector T = terminator resistors (3, 8-oin inline resistors) The terminator resistors only need to be installed if the tape drive is placed at the end of the SCSI cable. If the tape is in the middle (with the controller at one end and a terminated drive at the other), the terminator resistors must not be installed. If your Archive drive was an OEM pull-out like mine was, it probably did not even come with terminators! No problem, just install it in the middle. The jumper block consists of six columns with three rows of pins in each column. The leftmost two columns select "operation mode", the middle two are "buffer disconnect size" and the rightmost two are "SCSI ID". buffer disconnect size (16K) ------------------------- | . | . | . | . | . | . | | . | . | . | . | . | . | | . | . | . | . | . | . | ------------------------- operation SCSI mode ID The default setting is this: ------------------------- | . | . | .---. | . | . | .---. indicated jumper installed | . | . | . | . | . | . | | . | . | .---. | . | . | ------------------------- The pin definitions of the three regions are as follows: -------- --------- -------- | . | . | Serial | . | . | CF2 | . | . | ID2 | . | . | Diagnostic | . | . | CF1 | . | . | ID1 | . | . | Parity ena. | . | . | CF0 | . | . | ID0 -------- --------- -------- Operation mode Buffer disconnect SCSI ID size They give a table for SCSI ID selection. The default is ID # 0, and you will more than likely have to change this since 0 will want to be your boot disk. Your SCSI controller is likely to be ID 7 A typical ID for a tape drive is 2, but you can make it whatever you want from 1-6, mine is set at 5 ID number 0 1 2 3 4 5 6 7 Jumper ID2 X X X X ID1 X X X X ID0 X X X X X = jumper installed across the 2 pins "The buffer disconnect size sets the maximum number of bytes that can be sent over the SCSI bus during a single data transfer phase". "Disconnect size setting of 16K is minumum for using the Copy command" Buffer size 2K 4K 6K 8K 12K 16K 24K 32K Jumper CF2 X X X X CF1 X X X X CF0 X X X X Parity enable is the only one of the "operation mode" jumpers which you MIGHT want to set, and in any case would want to match the setting on your controller. I don't know much about this feature for SCSI, so I left it alone. I hope this information is useful to you, I have gotten my drive installed in my 386 PC clone with an Adaptec 1542B controller, and it seems to see the drive. However, I do not yet have a SCSI tape controller driver for the Adaptec, nor the backup software for DOS. Regards, Bill Norcott Object Based Systems, Digital Equipment Corporation