jh@tut.fi (Juha Heinanen) (07/27/90)
In article <10253@brazos.Rice.edu> ballen@csd4.csd.uwm.edu (Bruce Allen) writes:
- Internal SCSI 3-1/2" hard drive capacity of 207MB to allow local storage
of SunOS, applications, and data.
- Ethernet, 2 serial, SCSI-2, and Audio I/O ports for networking and
peripheral connections without using SBus slots
SCSI-2. Why nothing was mentioned about it in the announcement when
differences to Sparcstation 1+ were listed? Or is this not a real SCSI-2
port? What about the internat disk. Is it also SCSI-2? How does the IO
performance compare to SCSI-1 in Sparcstation 1? Where to buy SCSI-2
drives and how much do they cost?
Juha Heinanen, Tampere Univ. of Technology, Finland
jh@tut.fi (Internet), tut!jh (UUCP), jh@tut (Bitnet)colin@cs.utexas.edu (Colin Plumb) (07/31/90)
In article <10321@brazos.Rice.edu> jh@tut.fi (Juha Heinanen) writes: > >In article <10253@brazos.Rice.edu> ballen@csd4.csd.uwm.edu (Bruce Allen) writes: > > - Ethernet, 2 serial, SCSI-2, and Audio I/O ports for networking and > peripheral connections without using SBus slots > > SCSI-2. Why nothing was mentioned about it in the announcement when > differences to Sparcstation 1+ were listed? Or is this not a real SCSI-2 > port? What about the internat disk. Is it also SCSI-2? How does the IO > performance compare to SCSI-1 in Sparcstation 1? Where to buy SCSI-2 > drives and how much do they cost? The SCSI-2 standard added some high-speed features (an optional second cable for 16-bit and 32-bit transfers and negotiation protocols, and a fast SCSI negotiation protocol), but SCSI-2 is mostly a refinement of SCSI-1 with a lot more required commands, better error reporting, etc. Generally speaking, something that's SCSI-2 compliant is also SCSI-1 compliant. (There are a few exceptions, like the "ANSI stanadrd supported" field of the Inquiry reply, that something that's *really* picky might choke on.) SCSI-2, though, mostly addresses the same issues the SCSI-1 CCS did; the original SCSI-1 standard has about three mandatory commands and zillions of optional ones. Many manufacturers have been tracking the SCSI-2 standard; expect most new drives to support it. -Colin