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- Newsgroups: comp.sys.ibm.pc.hardware
- Path: sparky!uunet!zaphod.mps.ohio-state.edu!saimiri.primate.wisc.edu!doug.cae.wisc.edu!keiths
- From: keiths@cae.wisc.edu (Keith Scidmore)
- Subject: Fast hard drives - seek isn't everything.
- Organization: College of Engineering, Univ. of Wisconsin--Madison
- Date: 17 Dec 92 09:26:40 CST
- Message-ID: <1992Dec17.092641.24824@doug.cae.wisc.edu>
- Lines: 46
-
-
- 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. 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. 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. 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.
-
- Keith R. Scidmore
-
-