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- Newsgroups: comp.arch
- Path: sparky!uunet!spool.mu.edu!darwin.sura.net!jvnc.net!nuscc!ntuix!eoahmad
- From: eoahmad@ntuix.ntu.ac.sg (Othman Ahmad)
- Subject: IDE faster than SCSI-2
- Message-ID: <1992Nov5.094712.19056@ntuix.ntu.ac.sg>
- Organization: Nanyang Technological University - Singapore
- X-Newsreader: TIN [version 1.1 PL6]
- Date: Thu, 5 Nov 1992 09:47:12 GMT
- Lines: 57
-
- [ Article crossposted from comp.unix.bsd,comp.os.linux ]
- [ Author was Othman Ahmad (eoahmad@ntuix.ntu.ac.sg) ]
- [ Posted on Thu, 5 Nov 1992 08:07:16 GMT ]
-
- I posted an iozone benchmark using my 386/25Mhz machine which shows that
- it is slightly slower than a SCSI-2 hard-disk. Now with a 486/33, IDE is
- definitely faster than a EISA SCSI-2 486/50MHZ hard-disk.
- Iozone uses normal unix system calls for writing to disks, after all,
- that is how we write C programs.
- I may try to run a more sophisticated file system tester called
- bi? later on.
-
-
- JUlian's machine
- is a 50MHz EISA 486 with a 1.3GB drive attached via a Bustek 742a SCSI2
- adapter. It has 16MB of ram. Part of the disk (about 200MB is taken up
- by mach2.6 and is unavailable to 386bsd.
-
- I checked the load on this machine, it is very light. There is only another
- user apart from I.
-
- iozone 1
-
- Writing the 1 Megabyte file, 'iozone.tmp'...1.766667 seconds
- Reading the file...1.983333 seconds
-
- IOZONE performance measurements:
- 593534 bytes/second for writing the file
- 528694 bytes/second for reading the file
-
- Running on 486/33 with 256Kbyte RAM cache, maxtor 200Mbyte IDE hard-disk,
- 8Mbyte main RAM.
-
- Whereas the IDE runs XFree86 and open look window manager.
- I only use 1 megabyte for test file size.
-
- IOZONE performance measurements:
- 873813 bytes/second for writing the file
- 452623 bytes/second for reading the file
-
- Both machine uses 386bsd 0.1 heavily patched, so the timing measurements
- are consistent with each other.
-
-
- --
- Othman bin Ahmad, School of EEE,
- Nanyang Technological University, Singapore 2263.
- Internet Email: eoahmad@ntuix.ntu.ac.sg
- Bitnet Email: eoahmad@ntuvax.bitnet
-
-
- --
- Othman bin Ahmad, School of EEE,
- Nanyang Technological University, Singapore 2263.
- Internet Email: eoahmad@ntuix.ntu.ac.sg
- Bitnet Email: eoahmad@ntuvax.bitnet
-
-