Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!swrinde!elroy.jpl.nasa.gov!sdd.hp.com!news.cs.indiana.edu!stung@greatwhite.cs.indiana.edu
From: stung@greatwhite.cs.indiana.edu (Sho-Huan Simon Tung)
Newsgroups: comp.sys.next
Subject: Re: Build an external disk as boot disk with 2.0
Message-ID: <1991Feb9.152316.22061@news.cs.indiana.edu>
Date: 9 Feb 91 20:22:59 GMT
References: <1991Feb7.225634.28188@news.cs.indiana.edu> <16112@milton.u.washington.edu>
Organization: Computer Science, Indiana University, Bloomington.
Lines: 38

In article <16112@milton.u.washington.edu> wjs@milton.u.washington.edu (William Jon Shipley) writes:
>Note to 040 users: This drive may turn out to be a REAL win, besides
>the fact that it formats to 710 MB (with 1024 byte blocks) and costs
>~$1410 and has a five year warranty.  According to the drive manual,
>jumpers 1-2 allow you to set the drive in SCSI-2 mode, enabling
>synchronous transfer at up to 4.8 MB/s.  (This is the same transfer rate
>advertised in NeXT's blurb on the NeXTstation SCSI port, so I assume
>the NeXT can handle it as well.)
>
>Kind of beats the pant off of the 700 KB/s it runs normally, and the
>900 KB/s Wrens get.
>
>I haven't, unfortunately, gotten my station yet, so I haven't been able
>to test this.  When I do, I'll post the new and improved jumper settings
>for 040 folks.
>

I have tried to put back the jumpers I removed from CNH2 and it works.
However, I only get a small improvement on the transfer rate compared
to the 771374 bytes/s posted by Izumi with an 030. May be it is because that
my drive was build with asynchronous transfer mode on or may be the cable
is too long. Anyone knows the reason?

Here is the data:
localhost# disk /dev/rsd0a
disk name: FUJITSU M2263S-512
disk type: fixed_rw_scsi
Disk utility

disk> read
starting block? 0
# sectors per transfer? 16
number of transfers? 1000
sector increment? 16
16384000 bytes in 19477 ms = 841499 bytes/s
disk> quit

Simon