What Can You Do with Old Memory?

An anonymous reader asks: "I've just upgraded the RAM in a bunch of laptops and have several gigs of spare PC2700 memory sitting in a desk drawer. I also have another project which requires a large amount of low latency temporary storage. So, I figured this would be a great place to employ a dedicated hardware ramdisk but I am having a problem finding one that doesn't cost an arm and a leg, or preferably an empty unit that works with my spare memory. I have found many discussion forums which talk about building an IDE ramdisk out of commodity RAM, but have not found anyone that has actually done it. Has anyone on Slashdot found such a holy grail? Is anyone currently working on such a project? Do any of you have the engineering experience and interest to design such a device?" What novel purposes have you done with spare RAM that you haven't had the heart to throw away? "Before you ask, my primary server is maxed out on RAM at 2 gigs, and I am still filling up my 1 gig software ramdisk when I end up with an unusually large data set that needs processing. Yes, I am aware that an IDE device would be limited by the IDE interface for throughput, but I am more concerned with latency then throughput, and IDE is common and simple enough to connect to any of my desktop servers without the need for an add in card."

Comments

Re:Donate it to someone who needs it!

[jbn-o]

I concur, please do consider donating the memory. I worked for a local place that refurbished donated computers and used them for a community networking initiative which provided poor people with:

• a gentle introduction to using a computer (many hours of hands-on use with an instructor who can answer questions on-the-spot),
• a computer system (including all the hardware and software they needed to do real tasks),
• and a dialup account at the ISP operated by the organization.

All of this was provided at no cost to the recipient. As I understand the financing, the place is run on a combination of grant money, selling dialup accounts and hosting, and donations. After building and testing a bunch of low-end machines used for these classes, my work there ended. It was a good karma job with good people working there and I would work there again if the need arose.

As a former technician there, I would have been grateful to receive donated RAM for what is today considered old. I'm sure someone's machine would have used it (or some machine that will soon be donated there would use it).

Re:You probably want static ram

[jnik]

SRAM (Static) actually keeps it's state when you power it off
No. SRAM keeps its state as long as it's still powered. DRAM is in a state of continual decay, and must be refreshed on a regular basis.

ramdrive controllers

[winterdrake]

http://www.hyperos2002.com/07042003/products.htm

HyperOs HyperDrive III, 16GB capacity, ATA100, rather pricey.

http://www.cenatek.com/

Cenatek Rocket Drive, various product versions, PCI instead.

FreeCycle

[Solder Fumes]

Freecycle is a neat community giveaway-fest run through localized Yahoo groups. I live in a town of 100,000 and the Freecycle group has 700 members. I've given away old monitors, tables, couches, even a car. I got a nice little dual-proc server. Right now I'm paring down what I have for an upcoming move, but it's a great place to get free stuff. I see bedframes, dressers, computers, bikes, clothes, it makes dumpster-diving obsolete.

Re:You probably want static ram

[lachlan76]

The problem is that the D in DRAM means Dynamic. When you lose power, you lose all the data. SRAM (Static) actually keeps it's state when you power it off, more like a hard drive does

No. There are three main types of RAM:

• SRAM
• DRAM
• NVRAM

SRAM (Static) will keep its state as long as it is powered on.

DRAM (Dynamic) will lose its state, and must be regularly refreshed as long as it is powered on.

NVRAM (Non-volatile) keeps its state even when powered off.