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On Dec 16, 2004, at 10:01 AM, mielikki-ivtv wrote:
Why bother. Software raid easily outperforms any of these raid cards, Its Robust, Mature, Universally Supported, Open Source and highly configurable.
Actually, I can tell you from my own experience that the Promise FastTrack SX 4000 was faster using its hardware RAID than Linux MD soft RAID.
Using the following as a rough benchmark: date ; dd if=/dev/zero of=/mnt/array01/speedtest bs=1M count=1024 ; date
And running on an idle server, of course...
My HighPoint controller has been consistent at 30-32 seconds (about 33MB/sec if my math is right?). The Promise controller using its hardware RAID took 13-14 seconds (73MB/sec). In software RAID (setup as JBOD with Linux MD RAID), the Promise controller takes 49-50 seconds (20MB/sec).
I'm *almost* wondering if it's worth setting the Promise back into hardware mode to use it for video transcoding. I just use it to hold backups now, so I can deal with the Promise quirks without losing any data.
Best regards, Zac Bedell
======================================================
i'm living so far beyond my income that we may almost be said to be
living apart.
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