cdold@starfish.Convergent.COM (Clarence Dold) (02/18/89)
I just got a SCSI Micropolis 380MB 5.25" drive, which prompted me to check some raw transfer rates on two UNIX systems that we have. I transferred 7.6 MB from disk to null on active systems. #time dd if=/dev/rdsk/c0d0s2 of=/dev/null bs=128k count=60 System Interface Disk Seconds Rate 12.5MHz 68020 ST506 Hitachi DK511-8 20.2 380 KBpS 25 MHz 68020 ST506 Hitachi DK511-8 19.0 404 KBpS X-SMD NorTel 8412 11.11 691 KBpS SCSI Micropolis 1578 8.9 862 KBpS Copying point to point on the same disk. #time dd if=/dev/rdsk/c0d0s2 of=junk bs=128k count=60 25 MHz 68020 SCSI Micropolis 1578 26.8 573 KBpS (total) -- Clarence A Dold - cdold@starfish.Convergent.COM (408) 434-2083 ...pyramid!ctnews!professo!dold MailStop 18-011 P.O.Box 6685, San Jose, CA 95150-6685