Date: Fri, 11 Aug 1995 12:42:33 -0700 (PDT) From: "Rodney W. Grimes" <rgrimes@gndrsh.aac.dev.com> To: jmb@kryten.Atinc.COM Cc: msmith@atrad.adelaide.edu.au, john@zyqad.co.uk, freebsd-hardware@freebsd.org Subject: Re: Upgrade to my machine Message-ID: <199508111942.MAA04834@gndrsh.aac.dev.com> In-Reply-To: <Pine.3.89.9508111313.E6515-0100000@kryten.atinc.com> from "Jonathan M. Bresler" at Aug 11, 95 01:59:49 pm
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> > On Fri, 11 Aug 1995, Rodney W. Grimes wrote: > > > XX. BAS DEC3053L Dec/Quantum 535MB 3.5"x1", SCSI-II, 5400 RPM, 9.5mS $ 195.00 > > rod, this is a great drive and i am very satisfied with mine ;) > it is also a loud drive. when i hit swap on it, i know immediately. the > seek motor must be a monster! ;) Getting that last .5mS cost a bit in noise. You should be in a room with 10 of those laying out on benches running make worlds on a pile of machines, now that is LOUD. There are not so loud that once you put them in a case you can't stand next to it and have a phone conversation (I know drives that are that LOUD :-)). And if you want it to make noise, just fire up ``find /'', it's much noisier than a little paging :-) > > XX. MER FUJ-1606S Fujitsu M1606S 1.0GB 3.5"x1" 5400RPM 10mS $ 427.00 > > this is also a very nice drive, and its quiet as a mouse. i > have to listen carefully to hear it. (could be the result of years on a > motorcycle) It's not the motorcycle riding :-). Fujitsu is pretty good about quite drives, but boy there Alegro 7200RPM 2G drive is a loud one. It makes the 3053L sound quite in comparison! But it is not seek noise for that drive, it has a horrible spindle noise, and no, this was not a single drive with bad bearings. I went to RMA it and we went through 5 drives, all the same, and then we called Fujitsu, and they gave us the sound level spec for the drive. I was not very happy about it :-(. > > balance the application accross multiple spindls _or_ you had stripping > > technology in the OS you where running. > > talking of stripping, a while back, you, terry and others (if i > remember correctly) discussed disk stripping and spindle syncing a ... See other reply to a reply on this subject from some one else :-) > > IOZONE: auto-test mode Pretty typical numbers, but the numbers I use are always for a freshly newfs disk using the outer tracks (ie, maximal conditions). Your numbers are considerably lower than my 2.4/4.4MB/sec rating for the DSP3053L due to file system fragmentation and the fact your probably running at about the 250MB mark in on the disk (guessed from your numbers :-)). > > bonnie: I really should start to run bonnie under the same conditions as I do Iozone and see if I can correlate the two sets of numbers. > > /* dont jive with the iozone number very well, do they ? comments ? */ Was this under identical conditions? > > disklabels: NOTE: any misconfiguration here is my fault > any recommenations are appreciated Actually, any miss configuration on the DSP3053L is _MY_ fault. That is my standard label, I recognize it! > > type: SCSI > disk: sd1s1 This one you can take the blame for, but it is reasonable. > > > /* sysinstall put all these partitions off cylinder boundaries.....hmmm */ You don't have to worry about cyl boundaries inside the BSD slice. -- Rod Grimes rgrimes@gndrsh.aac.dev.com Accurate Automation Company Reliable computers for FreeBSD
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