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- Newsgroups: comp.arch.storage
- Path: sparky!uunet!stanford.edu!ames!pioneer.arc.nasa.gov!lamaster
- From: lamaster@pioneer.arc.nasa.gov (Hugh LaMaster)
- Subject: Re: Query: Solid State SCSI Systems
- Message-ID: <1992Nov10.021022.14711@news.arc.nasa.gov>
- Sender: usenet@news.arc.nasa.gov
- Organization: NASA Ames Research Center, Moffett Field, CA
- References: <1992Oct13.181846.27503@news.th-darmstadt.de> <1992Nov9.203919.9793@nntpd.lkg.dec.com>
- Date: Tue, 10 Nov 1992 02:10:22 GMT
- Lines: 39
-
- 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?
-
-
- --
- Hugh LaMaster, M/S 233-9, UUCP: ames!lamaster
- NASA Ames Research Center Internet: lamaster@ames.arc.nasa.gov
- Moffett Field, CA 94035-1000 Or: lamaster@george.arc.nasa.gov
- Phone: 415/604-1056 #include <usenet/std_disclaimer.h>
-