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From: gwe@cbdkc1.UUCP ( George Erhart x4021 CB 3D288 RNB )
Newsgroups: net.micro.mac
Subject: Re: Another Set of Disk Benchmarks
Message-ID: <1362@cbdkc1.UUCP>
Date: Sat, 29-Mar-86 10:55:07 EST
Article-I.D.: cbdkc1.1362
Posted: Sat Mar 29 10:55:07 1986
Date-Received: Sun, 30-Mar-86 10:41:53 EST
References: <8603252311.AA07791@kim.berkeley.edu>
Reply-To: gwe@dkc1.UUCP ( George Erhart x4021 CB 3D288 RNB )
Organization: AT&T Bell Laboratories, Columbus
Lines: 42

In article <8603252311.AA07791@kim.berkeley.edu> hamachi@KIM.BERKELEY.EDU (Gordon Hamachi) writes:
>Here are more measurements using Brecher disk benchmark on a Mac+
>with Apple's internal 800K floppy drive.  HFS and MFS volumes seem
>to perform differently.
>
>Of course, your mileage may differ...
>
>>The benchmark consists of three parts:
>>(1) 100 reads of 32KB of data from the start of the volume;
>>(2) 100 writes of 32KB of data to the start of the volume;
>>(3) 40 iterations of:  read one 512-byte block from an offset of 1MB, followed
>>                       by read of one 512-byte block from start of volume;
>>( times are in ticks, i.e., sixtieths of a second):
>> 
>>                             Data transfer time         Access Time
>>                             ------------------
>>                              Reads     Writes
>> 
> Apple Internal 800K drive (1)  8719      11543               (7)
> Apple Internal 800K drive (2)  8324      11540               (7)
> Apple Internal 800K drive (3)  8032      10902               (7)
> Apple Internal 800K drive (4)  7844      10908               (7)
>>Tecmar MacDrive           (5)  6017       6719               401
>>DataFrame 20                   1344       2233               487
>>HyperDrive                (6)  1586       1600               563
>>MicahDrive 20 AT                507        508               528
> 400K RAM Disk                   192        192               (7)
  1.5 Meg RamDisk           (8)   137        137                 5
>> 
>Notes: (1) Disk cache disabled, 400K MFS Volume
>       (2) 96K disk cache, 400K MFS Volume
>       (3) Disk cache disabled, 800K HFS Volume
>       (4) 256K disk cache, 800K HFS Volume
>       (5) 10MB Fixed
>       (6) original 10MB unit with old controller and version 5.1 software
>       (7) Volume to small to complete this test
        (8) Levco Monster Mac using The Assimilation Process Ram Disk (64k ROMS)

The access time test ran okay on my Mac because I could run a >1 Meg Ram disk.
-- 
George Erhart at AT&T Bell Laboratories Columbus, Ohio 
614-860-4021 {ihnp4,cbosgd}!cbdkc1!gwe