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Date:      Wed, 24 Oct 2001 11:58:57 +0100
From:      "Lawrence Farr" <freebsd-isp@epcdirect.co.uk>
To:        <mike@sentex.net>
Cc:        <freebsd-isp@freebsd.org>
Subject:   RE: 3Ware Escalade vs. Adaptec 2400A - test results
Message-ID:  <002501c15c7a$e15cded0$c806a8c0@lfarr>
In-Reply-To: <001c01c15ba1$74cf9cf0$c806a8c0@lfarr>

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Here are the results of a quick test of the Adaptec 2400A vs 3Ware 7xxx
Series.

I have 4 x Western Digital WD100BB 100Gb Drives connected to an Adaptec
2400A controller
with 32Mb of cache setup as a Raid5 volume. 
Using a simple script to generate a 1Gb file and read it back, I filled
the disk completely.

From the logs it generated:

64Kb Stripe size:

Pass 6 - 1048576 kb written in 89 seconds, at 11781 kb/Sec
Pass 6 - 1048576 kb read in 35 seconds, at 29959 kb/Sec
Pass 7 - 1048576 kb written in 88 seconds, at 11915 kb/Sec
Pass 7 - 1048576 kb read in 36 seconds, at 29127 kb/Sec

256Kb Stripe size:

Pass 6 - 1048576 kb written in 84 seconds, at 12483 kb/Sec
Pass 6 - 1048576 kb read in 42 seconds, at 24966 kb/Sec
Pass 7 - 1048576 kb written in 84 seconds, at 12483 kb/Sec
Pass 7 - 1048576 kb read in 43 seconds, at 24385 kb/Sec

And the 3Ware in Raid5 using 8 disks, 64k Stripe size:

Pass 23 - 1048576 kb written in 115 seconds, at 9118 kb/Sec
Pass 23 - 1048576 kb read in 15 seconds, at 69905 kb/Sec
Pass 24 - 1048576 kb written in 116 seconds, at 9039 kb/Sec
Pass 24 - 1048576 kb read in 15 seconds, at 69905 kb/Sec

Not really a straight comparison as the 3Ware has more spindles, but
that's as quick as it goes.

Iozone reckons:

File size set to 10240 KB
	Time Resolution = 0.000005 seconds.
	Processor cache size set to 1024 Kbytes.
	Processor cache line size set to 32 bytes.
	File stride size set to 17 * record size.
                                                            random
random    bkwd  record  stride                                   
              KB  reclen   write rewrite    read    reread    read
write    read rewrite    read   fwrite frewrite   fread  freread
           10240       4   17051   12833   201499   201916  168562
6888  182840  310519  171512    16444    17486  171286   171409

It's a damn shame about 3Ware. 

Lawrence Farr
EPC Direct Limited mailto:lawrence@epcdirect.co.uk
T:01179666123 F:01179666111 M:07970780901  



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