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Article #3258

Re: SCSI-Geschwindigkeit am A3000

#3258
From: Joern Plewka
Date: Thu, 01 Feb 1996 21:02
122 lines
6145 bytes
joergk@kinkel.informatik.uni-bremen.de (Joerg Kollmann) -> "SCSI-Geschwindigkeit am A3000"
(26.01.1996)
> Hallo Allerseits,
> 
> vor kurzem schrieb hier jemand, welche Zugriffsgeschwindigkeiten
> er mit DiskSpeed fuer eine IBM DPES am A3000 gemessen hat.
> Dabei kamen im Synchron-Modus Werte zwischen 2.8 und 3.2 MB/s
> heraus, die ich auch nachvollziehen kann. Dann kam noch eine
> Messung mit "no sync Negoation" oder so mit Werten von wesentlich
> ueber 3MB/s. Kann mir mal jemand verraten, was es mit 
> no sync negoation auf sich hat und wie man es einschalten kann?

Auf deutsch: Einige Plattenhersteller sind zu blöd eine Firmware
             zu schreiben, die sagt, daß sie kein SyncNeg beherrscht.
             Auf Grund des wirren Verhaltens gibt es an Platten
             oder Hosts die Möglichkeit zu sagen daß es kein
             SyncNeg für dieses Gerät gibt...wenn Du dem Host SyncNeg
             verbietest war es das für alle Geräte.

             Beim A3000 leisten Battmem und SCSI-Prefs dieses...
             Aber denk` dran es ist ein Fehler der Geräte, die behaupten
             sie können alles und beim ersten Zugriff war es dann nur warme
             Luft...Es ist ein Zusatzfeature des A3000.

Die Platte war ziemlich leer als ich getestet habe...

MKSoft DiskSpeed 4.1  Copyright C 1989-91 MKSoft Development
------------------------------------------------------------
CPU: 68040  OS Version: 40.70  Normal Video DMA
Device:  TEmp:    Buffers: 30
Comments: A3000T-040: IBM DPES 31080

CPU Speed Rating: 3076

Testing directory manipulation speed.
File Create:           99 files/sec  |  CPU Available: 22%
File Open:            130 files/sec  |  CPU Available: 16%
Directory Scan:       191 files/sec  |  CPU Available: 22%
File Delete:          168 files/sec  |  CPU Available: 17%

Seek/Read:            992 seeks/sec  |  CPU Available: 18%

Testing with a 4096 byte, MEMF_FAST, LONG-aligned buffer.
Create file:       821248 bytes/sec  |  CPU Available: 24%
Write to file:     887808 bytes/sec  |  CPU Available: 26%
Read from file:    872448 bytes/sec  |  CPU Available: 27%

Testing with a 16384 byte, MEMF_FAST, LONG-aligned buffer.
Create file:      1920671 bytes/sec  |  CPU Available: 47%
Write to file:    2181120 bytes/sec  |  CPU Available: 53%
Read from file:   2109440 bytes/sec  |  CPU Available: 54%

Testing with a 262144 byte, MEMF_FAST, LONG-aligned buffer.
Create file:      3297203 bytes/sec  |  CPU Available: 77%
Write to file:    3884823 bytes/sec  |  CPU Available: 90%
Read from file:   3819920 bytes/sec  |  CPU Available: 91%

Testing with a 1048576 byte, MEMF_FAST, LONG-aligned buffer.
Create file:      3959300 bytes/sec  |  CPU Available: 91%
Write to file:    4142522 bytes/sec  |  CPU Available: 95%
Read from file:   3888415 bytes/sec  |  CPU Available: 95%

Average CPU Available: 51%  |  CPU Availability index: 1569

----------------------------------------------------------------
Testing with a 4194304 byte, MEMF_FAST, LONG-aligned buffer.
Create file:      4107029 bytes/sec  |  CPU Available: 94%
Write to file:    4178634 bytes/sec  |  CPU Available: 95%
Read from file:   4142522 bytes/sec  |  CPU Available: 96%

Testing with a 8388608 byte, MEMF_FAST, LONG-aligned buffer.
Create file:      4147643 bytes/sec  |  CPU Available: 95%
Write to file:    4189067 bytes/sec  |  CPU Available: 96%
Read from file:   4194304 bytes/sec  |  CPU Available: 96%
---------------------------------------------------------------


MKSoft DiskSpeed 4.1  Copyright C 1989-91 MKSoft Development
------------------------------------------------------------
CPU: 68040  OS Version: 40.70  Normal Video DMA
Device:  Temp:    Buffers: 30
Comments: A3000T-040: IBM DPES 31080 NoSyncNegoation

CPU Speed Rating: 3075

Testing directory manipulation speed.
File Create:          100 files/sec  |  CPU Available: 23%
File Open:            130 files/sec  |  CPU Available: 20%
Directory Scan:       175 files/sec  |  CPU Available: 26%
File Delete:          157 files/sec  |  CPU Available: 23%

Seek/Read:            973 seeks/sec  |  CPU Available: 17%

Testing with a 4096 byte, MEMF_FAST, LONG-aligned buffer.
Create file:       806400 bytes/sec  |  CPU Available: 28%
Write to file:     864768 bytes/sec  |  CPU Available: 30%
Read from file:    855552 bytes/sec  |  CPU Available: 31%

Testing with a 16384 byte, MEMF_FAST, LONG-aligned buffer.
Create file:      1677312 bytes/sec  |  CPU Available: 55%
Write to file:    1889989 bytes/sec  |  CPU Available: 60%
Read from file:   1783808 bytes/sec  |  CPU Available: 62%

Testing with a 262144 byte, MEMF_FAST, LONG-aligned buffer.
Create file:      2595485 bytes/sec  |  CPU Available: 82%
Write to file:    3097472 bytes/sec  |  CPU Available: 92%
Read from file:   2585440 bytes/sec  |  CPU Available: 92%

Testing with a 1048576 byte, MEMF_FAST, LONG-aligned buffer.
Create file:      3057815 bytes/sec  |  CPU Available: 92%
Write to file:    3204694 bytes/sec  |  CPU Available: 96%
Read from file:   2941127 bytes/sec  |  CPU Available: 96%

Average CPU Available: 54%  |  CPU Availability index: 1660



    / no    /                                   / AMIGA /
   / MS+   /   J_Plewka@Amtrash.comlink.de     /   is  /
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/  http://users.informatik.fh-hamburg.de/~plewka_j  /
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From: j_plewka@people-s.people.de (Joern Plewka)
Subject: Re: SCSI-Geschwindigkeit am A3000
Date: 01 Feb 1996 22:02:22 +0100
Path: arc1-ca.pugleaf.net!people-s.people.de!j_plewka
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