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- Newsgroups: comp.sys.ibm.pc.hardware
- Path: sparky!uunet!sunnup!beemer
- From: beemer@sunnup.MAGDATA.COM (Oscar the Grouch)
- Subject: Fast hard drives - seek isn't everything.
- Message-ID: <BzGu6r.811@sunnup.MAGDATA.COM>
- Organization: Magnetic Data MN.
- Date: Fri, 18 Dec 1992 17:35:14 GMT
- Lines: 83
-
- In article <1992Dec17.092641.24824@doug.cae.wisc.edu> keiths@cae.wisc.edu (Keith Scidmore) writes:
- >
- >I asked Hard Drives Intl for their fastest IDE drive (thinking I would
- >let Zeos keep the Seagate 3283A 245MB drive that came with my system
- >and upgrade immediately).
- >HDI sent me a $1000 FJ2624A 510MB Fujitsu IDE drive.x
-
-
- So they sent you what you asked for the disk with the fastest published specs.
-
- >It turned out to be slower than the Seagate on
- >all the benchmarks and programs I tested even though it had about
- >an 8 ms seek time to the Seagate's 11 ms. The following explains
- >how this was determined and why the Seagate was faster on both
- >the benchmarks and on real programs.
- >
- >I started by testing the drives using PCTools, Norton Utilities,
- >Checkit, and Core. They all showed that the 245MB was *much* faster on
- >transfers but slower on average seeks. Thinking that the larger buffer on
- >the Seagate was just making the Seagate *look* faster, to these benchmarks,
- >I ran some *real* programs and timed the results. The tests were made
- >under DR-DOS 6 and under OS/2 2.0 HPFS. I tested things like OS2 2.0,
- >Windows 3.1,and WIN-OS2 start up times, Xtree manipulations of large (10MB)
- >sections of my file structure, and several editors and word processors
- >working with large files. My disks were all clean (not badly fragmented).
- >
- >Results:
- >
- >The Seagate was 10-20% faster than the Fujitsu on all my program test. The
- >reason is that the Fujitsu drive was about 18% faster on seek times but the
- >Seagate was about 50% faster in transferring the data. I returned the
- >Fujitsu to HDI.
- >
- >There were two things I learned.
-
- So who paid for your learning experience. Sounds like HDI did.
-
- >First, transfer speed is significant in
- >choosing a drive. The Fujitsu's 8 ms average seek time (measured) didn't
- >make it faster. The Fujitsu should have had the additional advantage in that
- >the software on the larger disk takes less of a percentage of the platters
- >and the seeks should have been a smaller percentage of the total stroke.
- >
- >Second, HDI doesn't always know what they are talking about.
-
- What they told you was what you asked for the published stats.
-
- >They were inaccurate in telling me the stats of both drives. My tests
- >showed that the Seagate Drive on my Zeos 486-66 VLB machine ran faster
- >in transferring data than HDI said it *could* by 50%. This was true even
- >on the Core benchmark that they suggested I use. Unless you have a
- >really fragmented disk I think the Seagate is the better bet.
- >
- >The bad news is that the Seagate drive is in such demand that HDI can't
- >get them. I'll just have to live with the one 245MB that came with my
- >Zeos system for now.
- So let me guess, after installing the disk, beating hell out of it with
- your testing program, and using it for some unmentioned period of time
- you returned it for a full refund. Not; because the drive was defective.
- Not because it did not meet the published specs. but because it did not
- live up to your expectations. Now that it has been returned what do you
- expect HDI to do with it. They can no longer sell it as a new drive, that
- would be unethical. They could probably sell it as a used drive but that
- is not their business. So what they do is take a loss on the drive and dump
- it through a broker. This loss gets distributed across the product line as
- a price increase, and we all pay more for components in the future. I for
- one am unwilling to finance your education. I work for a Disk company and
- get tired of seeing this happen time and again. We have plenty of the Seagate
- 245s in stock but would not offer one to you. You would probably beat hell
- out of it and then send it back because you did not like the color. I am
- sure you would not appreciate someone doing this to something you sold them
- but you seem to feel you have some special privledge that makes it ok for
- you to do this. I cannot understand this kind of attitude.
-
- >
- >Keith R. Scidmore
- >
- Tom Neveras
- --
- Tom Neveras twn@sunnup.MAGDATA.COM
- Magnetic Data
- 6754 Shady Oak Road
- Eden Prairie MN. 55344
-