phil@rice.edu (William LeFebvre) (05/20/89)
Eduardo Krell says: > I'm using a SUN SMD-4 (the 7053) with a CDC 9720-1230 drive and I've never > had any problems, so the SMD-4 does handle 3 MB/s transfer rates. I know > the documentation for the SMD-4 says that it will only support up to 2.4 > transfer rates, but I called SUN technical support and they said it really > does support 3.0 transfer rates. I guess the most convincing argument is > the fact that it works fine. I got this bit of information from someone "in the know": Well, you got lucky. Sun purchases the XD7053 from Xylogics without specifying that they be suitable for 3.0. Some of the ones they get will not run that fast, although most of them will. The bottom line is that you _ARE_ taking a chance unless you get one certified for 3.0. This information was given to me by people at SUN who are in a position to know this, and had more to loose by giving me the information than they had to gain.
mooney@xylogics.com (Jim Mooney) (05/27/89)
In article <3322@kalliope.rice.edu> phil@rice.edu (William LeFebvre) writes: >X-Sun-Spots-Digest: Volume 7, Issue 303, message 7 of 12 >> I'm using a SUN SMD-4 (the 7053) with a CDC 9720-1230 drive and I've never >> had any problems, so the SMD-4 does handle 3 MB/s transfer rates. I know >> the documentation for the SMD-4 says that it will only support up to 2.4 >> transfer rates, but I called SUN technical support and they said it really >> does support 3.0 transfer rates. > >I got this bit of information from someone "in the know": >Well, you got lucky. Sun purchases the XD7053 from Xylogics without >specifying that they be suitable for 3.0. Some of the ones they get will >not run that fast, although most of them will. As a person "IN THE KNOW" let me help clarify this issue. There are two version of the SMD4 (7053). The initial shipments were spec'd to support a maximum rate of 2.4MB/S. All shipments are now spec'd at, and are supporting, 3.0MB/S transfer rates. There is an easier way to tell what your controller supports than trying a drive. On the back of each controller there are two white stickers. One is a serial number and the other is the model number. Models that support 2.4 are: 7053-101, 7053-102, 7053-103, and 7053-104. Models which support 3.0 are 7053-105 and anything to follow. James Mooney, Sr. Applications Engineer, Xylogics,Inc. mooney@Xylogics.COM