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RamDisks?????

post #1 of 7
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I overheard some guys talking about ramdisks and was wondering what it is. Can someone explain what a ramdisk is?
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post #2 of 7
Ramdisk usually used for PXE/netboots/nfsroot clients and doesn't require HD just RAM. You can build a small customized ramdisk in linux
for your clients to use and you can do read and write temporarily because you are using you memory as your disk.


hth
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post #3 of 7
Quote:
Originally Posted by klewlis1 View Post

I overheard some guys talking about ramdisks and was wondering what it is. Can someone explain what a ramdisk is?

I run one, though there isn't much of a point if you have a SSD.

There's a free version of an application called RAMDisk (just google it). It takes a portion of your system memory, allocates it, and then the program allows that portion of memory to be mounted and visible as a system hard disk. I put my browser cache on mine. I think with the freeware version of RAMDisk, you can make a disk as large as 2GB. With the purchased version, I think you can make disks as large as you want.

When you put your computer on hibernate or shut down, the RAMDisk application will dump the info on the allocated system RAM for your RAMDisk onto one of your physical hard drives--much like how hibernate writes the system ram to your hard disk when you hibernate.

I also use this on my work laptop, which only has a regular HDD, for installing my browsers since my HDD is quite slow. It works fine.

But as I said, really not useful if you have a SSD.

edit--with the freeware version limiting the total size to 2GB, there isn't much you can really do with this in terms of large programs.
    
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post #4 of 7
Quote:
Originally Posted by klewlis1 View Post

I overheard some guys talking about ramdisks and was wondering what it is. Can someone explain what a ramdisk is?

It's a virtual hard drive in your system RAM. A ramdisk shows up as a partition, like C: or D: or whatever, and allows you to store data on it. As RAM is volatile, some ramdrive programs store data to your hard drive when you turn off your computer.

Cool... so what, right? Well, RAM is several orders of magnitude faster than your hard drive. If you put, say, a program on it, loading times will be instant. People often use it for cache in photoshop or web browsers, to speed up the program. With symbolic links or junction points, you can find all sorts of creative uses for it, like putting a game on it to decrease load times, or capturing raw, uncompressed video in short bursts.

I believe Ramdisks are used most frequently in servers.
Edited by brucethemoose - 1/19/12 at 7:04pm
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post #5 of 7
Quote:
Originally Posted by guyladouche View Post

There's a free version of an application called RAMDisk (just google it). It takes a portion of your system memory, allocates it, and then the program allows that portion of memory to be mounted and visible as a system hard disk. I put my browser cache on mine. I think with the freeware version of RAMDisk, you can make a disk as large as 2GB. With the purchased version, I think you can make disks as large as you want.

edit--with the freeware version limiting the total size to 2GB, there isn't much you can really do with this in terms of large programs.

ImDisk is free and works great and has no cap, and RAMDisk has a cap of 4GB


Information:
RAMDisk is a program that takes a portion of your system memory and uses it as a disk drive. What is the benefit? In a word: SPEED! An additional feature of a RAMDisk is that it will never wear out. You can access it at maximum bandwidth 24/7/365 without fear of mechanical failure, or fragmentation (a RAMDisk can become fragmented just like any other disk, but it does not take a performance hit like a physical disk does when it becomes fragmented). A RAMDisk operating at maximum bandwidth does not produce excessive heat, noise or vibrations.
Most users use RAMDisk to speed up applications like:
  • Databases
  • Internet Explorer and Firefox cache for faster web surfing
  • Audio and Video editing
  • CAD programs
  • Photoshop Scratch Disk
  • Speeding up CD duplication
  • Games
  • SETI processing
  • TEMP files
  • Swap space
  • Web server cache
  • Custom applications with high I/O, high bandwidth, or high security requirements

I have a guide in the third post here on how to set one up: www.overclock.net/t/1156654/seans-windows-7-install-guide-optimization-for-ssds-hdds


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Edited by Sean Webster - 1/19/12 at 7:11pm
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post #6 of 7
Thread Starter 
Nice,thanks for the info. My ssd died so im waiting for an rma and i only have 1 500gb hd, i been trying to wait for prices to drop before getting another. I might give it a try and see how it compairs to my ssd.
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post #7 of 7
Quote:
Originally Posted by klewlis1 View Post

Nice,thanks for the info. My ssd died so im waiting for an rma and i only have 1 500gb hd, i been trying to wait for prices to drop before getting another. I might give it a try and see how it compairs to my ssd.

I think a RAM disk will be faster than an SSD.

Here's an idea of what you could do with a RAM Disk:
If I need to defragment my hard drive, but also want to play a game, I make a 12GB RAM disk (I have 16GB of RAM, I use ImDisk which has no limit), copy a game over to the RAM disk and launch the game off of that. That way, the hard drive can defragment uninterrupted and the load times are insanely fast.

Of course, if it's a single player game you'll need to copy the saves back over to your hard drive but this is just one of the uses I have for a RAM disk thumb.gif
 
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