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From: windemut@lisboa.ks.uiuc.edu (Andreas Windemuth)
Newsgroups: comp.sys.next
Subject: Re: Disk transfer rates
Keywords: disk transfer rate
Message-ID: <1991Jun13.183437.20622@ux1.cso.uiuc.edu>
Date: 13 Jun 91 18:34:37 GMT
References: <64618@bbn.BBN.COM>
Sender: usenet@ux1.cso.uiuc.edu (News)
Organization: University of Illinois at Urbana
Lines: 81

In article <64618@bbn.BBN.COM> fwhite@bbn.com (Fred White) writes:
> 
>  I've been able to glean the following measurements of disk speed on
> an 040 NeXT from back issues of comp.sys.next.  I was wondering if
> anyone has the corresponding numbers for the Maxtor 8380S and 8780S
> and the Seagate ST1480?  I'm trying to narrow down what disk to buy.
> Thanks!
> 
> Disk                            Transfer rate (read)
> --------------------		--------------------
> Micropolis 1588-15 		1.2MB/s
> QUANTUM LP105S			926172 bytes/s
> FUJITSU M2263S-512		841499 bytes/s		(SCSI-2 mode)
> FUJITSU M2263S-512		771374 bytes/s
> 
> The benchmark:
> 
> sylvester> sudo disk /dev/rsd0a
> disk name: QUANTUM LP105S 910109405
> 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 17690 ms = 926172 bytes/s
> disk> quit
> 
> Fred White            Bolt, Beranek, and Newman, Inc.
> fwhite@bbn.com	      150 CambridgePark Drive
> 617 873-3536          Cambridge, MA 02140
> 617 873-8202 (fax)

Here is some measurements that I made:

disk name: MAXTOR XT-8380S
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 28712 ms = 570672 bytes/s


disk name: SEAGATE ST1480
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 19826 ms = 826639 bytes/s


disk name: QUANTUM LP105S 910109405
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 17543 ms = 934093 bytes/s

--
		Andreas Windemuth

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