Re: SCSI drive replacement using SD?

On 2014-11-04 00:17, Justin wrote:
> I think it’s important to maintain perspective on the difference
> between the nominal performance limits of the bus and the real world
> performance of the system the bus is included in.  SCSI should’ve
> done 5MB/s but most of those 68k macs couldn’t do that

That's my experience as well and my first comment on that was exactly 
that it might be because of the limits of the Macs they tested it with. 
Amigas with good SCSI almost always did better in terms of performance.

> In that 9600 I currently use two 7.2k RPM Barracuda drives in
> software RAID on an Adaptec 2940UW card (a PC one that I bought for
> nothing and flashed the PowerDomain firmware into for a tiny fraction
> of the price). I’m always worried that these or the drives in my
> Amiga are going to crap the bed, and they are really annoyingly loud
> to leave on all the time anyway, so I do not leave these machines hot
> with the drives spinning.

I always used those little programs to turn them off during work. The 
drawback was than whenever I wanted to save something I had to wait for 
the drive to spin-up.

> Anyway, I’ll be very interested to see how
> the system “feels” in terms of boot time and latency booting from
> this thing.

My Amigas boot significantly faster from either the 
WarpEngine->ACARD->CF or FastATA->CF. It is not that kind of difference 
you may see when switching your laptop from 5400rpm HDD to a Samsung 840 
PRO SSD but it is still visible. Once it's booted the difference is not 
that important - Amigas didn't have to access harddisk because you moved 
a mouse pointer (as in today's systems) so it's not that much visible 
anymore but still - it's silent and without the need to wait for spin-up.

> Maybe I’m officially old, I used to have a ton of fans
> crammed into my PC’s and they all sounded like jet engines,

That's why I switched to water cooling when I was using PCs - couldn't 
stand that noise.

> FWIW for those who got errors, the site told me the thing was out of
> stock but let me place an order anyway.

I'll try again in a day or two.

-- 
SD!

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