🚀 go-pugleaf

In article <1992Nov9.203919.9793@nntpd.lkg.dec.com>, cassidy@esd55.enet.dec.com (Charlie Cassidy) writes:
|> 
|> We are showing the following products at COMDEX next week.  We also
|> announced today the EF5x family of DSSI SSDs for Digital's VAX and ALPHA AXP 
|> systems.  Please contact me or visit us at the Digital's OEM booth on the Comdex


I guess this seems like an excessively "Commercial" posting for
this newsgroup.  I think it belongs on biz.dec.announce, or
comp.newprod, etc.  Since it is here, however, I have a few
questions:


|> The ESP500 Models 510 and 530 provide up to 100 times faster
|> access to data and up to 10 times greater transaction throughput
|> than magnetic disks.  The near-instantaneous access time of
|> 0.25ms is achieved by eliminating the latency associated with
|> magnetic disk rotation and head seek.  Not only do ESP500 SSD
|> perform at semiconductor speed, they are predictable as well,
|> because the constraint of data locality associated with magnetic
|> media does not affect SSDs.


What is the transfer rate?  May I assume that it is 10MB/sec?

What is the measured latency through a real SCSI-2 controller?

For example, what is the latency I can expect on a DECsystem 5500?

Measured the way DEC usually measures these things, how many QIO's/sec
can the device handle at the usual delay points?  Can the existing
controllers, such as the one on the DECsystem 5500, saturate it?


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