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- Newsgroups: comp.sys.sgi
- Path: sparky!uunet!ukma!asuvax!ncar!csn!seismobros!seismobros!geomagic
- From: geomagic@seismo.do.usbr.gov (Dan O'Connell)
- Subject: Exebyte 8500 config on a Crimson
- Message-ID: <1992Nov10.172707.29397@seismo.do.usbr.gov>
- Sender: geomagic@seismo.do.usbr.gov (Dan O'Connell)
- Organization: Seismotectonics Group, U.S. Bureau of Reclamation.
- Date: Tue, 10 Nov 1992 17:26:57 GMT
- Lines: 26
-
- We installed an Exebyte 8500 on a Crimson running 4.0.5C. It has
- a Peripheral Visions compression board with a front door display
- panel. We have make all the various devices for it; tps1d4, tps1d4.8200,
- tps1d4.8500, tps1d4nr, tps1d4nr.8200, tps1d4nr.8500, etc.
- When we write to using tar, we never get a transfer rate exceeding
- 120 Kbytes/sec. We have tried both 8500 and 8200 modes, with and without
- compression. We get about 180 Kbytes/sec writting to our 4mm DAT drive.
-
- We expected to get 300-400 Kbytes/sec transfer rates with the Exebyte
- in 8500 mode. Is there something obvious we should look for that would
- explain the poor Exebyte performance?
-
- Here is the info returned by mt
-
- mt -t /dev/rmt/tps1d4 status
- Controller: SCSI
- Device: EXABYTE: EXB-8500-85Qanx00446
- Status: 0x200
- Drive type: 8mm cartridge
- Media : Not READY
-
- Thanks for any info.
- --
- Dan O'Connell
- geomagic@seismo.do.usbr.gov
- Seismotectonics Group, U.S. Bureau of Reclamation
-