zs01+@andrew.cmu.edu (Zalman Stern) (08/11/90)
elm@sprite.Berkeley.EDU (ethan miller) writes: > Yes, IBM's new Lightning drives do spin faster than 3600 RPM. They are > 3.5" drives that spin at 4300+ RPM. They're the drives in the RS6000s. > > ethan A number of people have commented on the high speed drives IBM is using in their new workstations. Here are some numbers from the "IBM RISC System/6000 Hardware Technical Reference, Options and Devices" manual (Order #:SA23-2646-00): Model & Transfer Rate (Mbytes/s) Form Capacity RPM Avg. Seek Time Media One track read 3.5" 120 Meg. 3600 23.0 ms 1.3 1.0 3.5" 320 Meg. 4318 12.5 ms 2.0 1.7 5.25" 355 Meg 3600 17.0 ms 1.9 1.6 5.25" 670 Meg 3600 18.0 ms 1.9 1.6 5.25" 857 Meg 4986 11.2 ms 3.0 2.4 All except the 120 are SCSI drives. The 355 and 670 are made by Maxtor. The 320 (lightning) is an IBM drive and I believe the 857 is made by IBM as well. I'm pretty sure that the 3.5" drives are only used in the desktop (Model 320) machine. A number of the 1 Gigabyte 5.25" drives spin at rates higher than 3600RPM. The highest I've heard of is 5400RPM (for a Hewlett Packard drive if I remember correctly). Sincerely, Zalman Stern | Internet: zs01+@andrew.cmu.edu | Usenet: I'm soooo confused... Information Technology Center, Carnegie Mellon, Pittsburgh, PA 15213-3890 *** Friends don't let friends program in C++ ***