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- Path: sparky!uunet!munnari.oz.au!nutmeg!hoffmann
- Newsgroups: comp.sys.amiga.hardware
- Subject: Re: Hard disk throughput speed ?
- Message-ID: <1992Sep9.214811.3744@darwin.ntu.edu.au>
- From: hoffmann@nutmeg.ntu.edu.au (Arthur Hoffmann)
- Date: 9 Sep 92 21:48:11 +0900
- Sender: hoffmann@nutmeg (Arthur Hoffmann)
- References: <1992Sep8.171338.2492@Rapnet.Sanders.Lockheed.Com> <copes.716015341@marsh>
- Distribution: world
- Organization: Information Technology, Northern Territory University
- Nntp-Posting-Host: nutmeg.ntu.edu.au
- Lines: 39
-
- In article <copes.716015341@marsh>, copes@cs.curtin.edu.au (Simon Cope) writes:
- > msnider@Rapnet.Sanders.Lockheed.Com (Marc A. Snider x0193) writes:
- >
- > >What kind of throughput can I expect from a stock A3000? How about the
- > >numbers for a GVP combo accelerator (do they make an '040 based combo)
- > >using their scsi interface and an aftermarket drive? Finally, what is
- > >the fastest throughput possible today on an A3000 and by what means?
- >
- > >Thanks,
- > >M. Snider
- > >msnider@rapnet.sanders.lockheed.com
- >
- > My A3000 25/50 with 6 megs fastram runs around 850K/sec to 1M/sec depending
- > on disk usage and fragmentation. Thats set up with 100 buffers and the stock
- > Quantum 52LPS drive. Sling in a Quantum 240LPS and you can expect around
- > 1.3-1.6 M/sec, sustainable. GVP's 040 for the A3000 doesn't have a scsi
- > controller onboard, even if it did it would be slower than the standard one
- > unless it was a FAST scsi-II controller.
- > Dave Haynie said they have a Maxtor Magic drive in the C= software department
- > that runs 3.9M/sec through the filesystem and 4.2M/sec direct to the driver.
- > I don't know what particular drive this is. Perhaps Dave could post the
- > model no. for us :-)
- > The A3000 scsi controller is probably the fastest scsi controller you'll find
- > on anything under $10000.
- >
- > --
- > copes@cs.curtin.edu.au
-
-
- Hi,
- I wonder how you get such high speeds I am using an A3000 and a Quantum LPS105
- HD, but I only get a diskspeed (reading) of 820k/sec, and I have 16M FastRam and
- have allocated 1600 buffers for the drive. I measured that with Diskspeed V4.2.
- Why does Diskspeed hang my machine when it does it's byte allignmenttest at a
- 4096 byte buffer??? After a reboot then, the disk has a checksum error.
-
- Arthur.
- Arthur Hoffmann
- hoffmann@pandanus.ntu.edu.au
-