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Article #21045Re: The IPI fast peripheral interface
From: Jeremy West
Date: Thu, 04 May 1989 12:11
Date: Thu, 04 May 1989 12:11
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In article <128@melba.oz>, gnb@melba.bby.oz (Gregory N. Bond) writes: > > > The new Sun servers (SPARCservers?) use IPI disks for the high end > boxes, according to the product launch here yesterday. This would > indicate that they are faster even than SMD disks on the VME bus. > > How does Sun do the IPI host adapter? > Sun has its own design of IPI controller on a 9U VME card. It has an on-board 68020 and 1 Mb of read-ahead cache and has some good optimisation algorithms. It can take faster disks than are currently available and does fast burst accesses on the VME bus. Throughput is about twice as good as SMD, cabling is simpler, up to 8 drives per controller and 4 controllers per system with 1 Gb (formatted) drives to give max of 32 Gb on SPARCserver390 systems. Price is similar to SMD. Adrian Cockcroft Sun Cambridge UK TSE sun!sunuk!acockcroft (Borrowing Jerry West's account at Mountain View to get at USENET)
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arc1-ca.pugleaf.net!utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!tut.cis.ohio-state.edu!ucbvax!pasteur!ames!sun-barr!male!pitstop!jwestReferences:
<12478@reed.UUCP> <128@melba.oz>Show Full Headers
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Path: arc1-ca.pugleaf.net!utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!tut.cis.ohio-state.edu!ucbvax!pasteur!ames!sun-barr!male!pitstop!jwest From: jwest@pitstop.West.Sun.COM (Jeremy West) Newsgroups: comp.arch Subject: Re: The IPI fast peripheral interface Summary: Sun's own controller Message-ID: <655@pitstop.West.Sun.COM> Date: 4 May 89 12:11:44 GMT References: <12478@reed.UUCP> <128@melba.oz> Organization: Sun Microsystems, Mt. View, CA Lines: 23