A thought about limited Transfer Rates.

[cdpage]

I realise this is not realy a CPU related issue, But it covers more then one Area, and most ppl in the CPU threads seem to have a Greater understanding. So i thought i might post this thought/question/idea here.

ATA(100), UltraATA(133), and SATA(150) have been talked about a lot lately. For the most part about how they are all basicly as fast as the next because the unit its trafering Data from can not go that fast.

So here is my thought. (i'll use a ROM as the example)

If a CD/DVD ROM can only read X amount of data so fast, the ROM still can not send 150Mb/s to the CPU.

However, RAM is MUCH faster, 400Mhz+.

Would it not be feasable to have a 'buffer' of sorts that can take a Whole CD/DVD and Cache it to an aloted portion of RAM?

I realize that that might not make much a differance when the CD/DVD is Just placed in the machine... but im sure that that would Help Loads for any recalled information.



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[Ned_Flanders]

Firstly you would need at least a Gig or RAM, (600+ MB for the cd, and rest for system operation). Most people have around 256mb in their machines.
Also it would take takes to cache an entire CD to the RAM.

No offence, but it is the worst idea I have heard in along time lol

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[peteroy]

Fastest memory on your computer is the on die cache on the cpu.

If only you could put on the CPU at least 1gb of memory

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[etp777]

Had an old cdrom network server that went from cd, to a 9gig scsi drive to be cached, and then from that cached most accessed stuff into ram. Been done.

 

[Guest]

also knopix does something like that.

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[thaloc]

RAM is expensive when compared to CD-ROM's, but I think lots of people (I for example rip their CDs into images on HDD and use CD-emulation software (like Daemon Tools) to access them. HDD space is cheap, and HDD's are way faster than CD/DVD-ROMS and produce less noise. And you don't have to swap CD disks if you want to play different game...

 

[Guest]

Exactly what I do I got a good 40gig of images on my storage HD...80gig is getting low for storage tough.

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[cdpage]

thanks for laughing at me... BTW i think its safe to say that 512 is standard now... with XP an all. and anyone with anything less... well such 'bad ideas' wounldn't apply to them anyhow.

I realize that you would need enough RAM for a full CD (700MG) or even as much as 4-8 GB RAM should it be done with DVD's

i know of image burning CDs to the HD, but this is not exactly what i ment.

I was looking for something like what PeteRoy said, 'On the Die Cache'... but more likely somewhere else on the board as thats not possible...yet.


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[Ned_Flanders]

lol, sorry I did not mean to sound as harsh as that. I admit it is a good idea in theory, but not in practice!

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[ChipDeath]

You can get PCI cards that take OLD PC100/PC133 SDRAM, and show up as a Hard disk. They had like 6 or 8 slots, and could support a few Gb I think. Not as fast as L1 cache, but massively faster than a hard disk, and probably useful if you have loads of old SDRAM kicking around.

I remember reading an article about them a while ago, but can't remember where (might have been here, or perhaps linked to in the forums...)..

Although I'd rather run the OS & Swapfile off it than use it for caching CDs. (it could be externally powered so wouldn't lose data when the pc was off)..

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[cdpage]

Yea i heard about those things and thats basiclly the idea i was getting at. To use it for your HD, ROM, or even programs. altho i was thinking of a more on board solition, using a PCI PCI-Ex or AGP type slot would i suppose be the next best thing.

As for Ram laying around... ya theres tons of that, at least in the 100, 133 range We might as weel use them for something.

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