27 Feb
2002
27 Feb
'02
6:49 a.m.
On 2002.02.27 18:06 John Allain wrote:
Nice intro Glossary, but no entry on SDI. That's
been troubling
me lately... Why were there both DSSI and SDI drives around
at the same time and how did the SE know which to use?
SE?
DSSI and SDI are two very different things. DSSI and CI are physical
transports for SCA (Systems Communication Architecture) and differ only
in the hardware. In fact the SHAC DSSI adapter is mostly a CI adapter on
a chip. MSCP is a subpart of SCA. SCA defines much more than disk and
tape IO...
SDI is only a (more or less dumb) high speed serial disk interface.
You may read: http://minnie.tuhs.org/Quasijarus/vaxhw/mscp_clu.html
--
tsch??,
Jochen
Homepage: http://www.unixag-kl.fh-kl.de/~jkunz/