On 5/26/2025 3:20 PM, Chris M. Thomasson wrote:That's a hard one. Perhaps a special ISA for the bridge, but then again, it might be the same ISA as multiple multi-core chips on the HDD.On 5/26/2025 2:15 PM, Stephen Fuld wrote:Which, user programmable or same ISA?On 5/26/2025 1:04 PM, Chris M. Thomasson wrote:>On 5/26/2025 1:00 PM, Chris M. Thomasson wrote:>On 5/26/2025 6:06 AM, Michael S wrote:>On Mon, 26 May 2025 06:46:01 GMT>
anton@mips.complang.tuwien.ac.at (Anton Ertl) wrote:
>antispam@fricas.org (Waldek Hebisch) writes:>Discs probably are less competitive than>
motherboards,
I expect them to be just as competetive as motherboards, at least in
the past. The fact that there are only 2-3 surviving HDD
manufacturers indicates intense competition in the past, possible less
today.
>but I would expect adding 256 MB to lead to 1>
dollar or more increase of cost.
What makes you think so. The DRAM chips on DDR4 DIMMs today hold
512MB (x8->4GB DIMM) up to 2GB (x16->32GB DIMM). There are 2GB DDR3
DIMMs (using 256MB chips), but they do not cost less than 4GB DDR3
DIMMs. Choosing a DRAM cache of 256MB rather than 512MB is unlikely
to save even one cent.
>
- anton
You are projecting computer memory prices on very different market.
The memory used for HD cache is likely an individual memory chip or two
chips and likely several generation older than devices used in computer
DIMMs. I would expect something like x16 DDR3. Looking for price of
such devices on Mauser I see following figures:
1 Gbit - $2.10
2 Gbit - $2.60
4 Gbit - $2.90
So, even assuming that disk manufacturer pays 1.5x to 2x less than what
we see on Mauser, there exists measurable difference between 128, 256
and 512 MB. The difference is smaller than suggested by Waldek but much
bigger than suggested by yourself.
I wonder if a HDD can have several multi-core processors on them, where adding a new drive means you get not only more storage, but more CPU's in the system like a NUMA machine? For some reason, the AI's have a lot of "fun" when I talk to it about such things... ;^) lol.
>
Or even, have some ram on there, say a couple of gigs. So, adding a new drive gives you more storage, more memory, and more cpus?
The CPU on the drive is not user programmable, and is almost certainly not the same ISA as the "main" CPU in the system.
>
>
Can it be?
No disk vendor would allow user programmability as it would void any warranty, possibly corrupt data, etc. As for same ISA, many years ago, one vendor used an 80186, but today, any current X86 would be overkill and too expensive for the job.Ahh, well, then the same company that made the CPU's, GPU's, would be the same company that made these "special" HDD's? Pie in the sky, version 42... ;^) lol. Sorry.
Almost akin to the SPU on playstation. Except, each SPU ha aLOL!!! However, this had, iirc, PPC for motherboard and a special vector language for the SPU's?hard drive, many cpus, cores, threads, with dram and al that fun shit? Or too wacky? Or stupid in a sense? Well, how stupid on a scale from 0 to 1? ;^)No comment. :-)
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