A RAM disk (or RAM drive) is a block of RAM that a computer is using as though it were a disk drive.

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Why does RAM have to be volatile?

If computer RAM was to be non volatile like other persistent storages, then there would be no such thing as bootup time. Then why is it not feasible to have a non volatile ram module? Thank you.
64
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11answers
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Does every OS need RAM?

Is there an OS which can be used without RAM, specifically the kind I can create a bootable pendrive from and use it in the computer? This gets awkward, since booting is essentially loading OS in ...
20
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11answers
5k views

Why would a RAMdisk be used today?

After reading this question I started thinking, "Hey, what happened to those RAM disk utilities we used to run in the ol' DOS days?" I haven't heard about RAM disks for years until today, but why? ...
20
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7answers
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How can I change the amount and size of Linux ramdisks (/dev/ram0 - /dev/ram15)?

Using Linux, when I boot I automatically have 16 16MB ramdisks, however, I would like to create one really large ramdisk to test some software. I found that I can adjust the size of the ramdisks ...
17
votes
2answers
7k views

Can I put /tmp and /var/log in a ramdisk on OS X?

For non-critical Linux systems, I often move things like /tmp and /var/log to tmpfs to save on some disk writing. I've been doing this for a year or so and if I ever need the logs across reboots, I ...
14
votes
12answers
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Is putting the swapfile & temp folder to ramdisk a good idea in Windows 7 64 bit with lots of RAM?

I want my Windows to run as fast as possible. If I have 12GB RAM in Windows 7 64bit, quad core CPU, and all apps fit in memory, will the swap file ever be used for anything? The question is about if ...
13
votes
5answers
22k views

Why not use SSD space as RAM?

I am new to the hardware side of things. I run a few machines which have 400GB+ SSD's and 32GB RAM. I have been thinking about going up to 64GB RAM, however, I was thinking, since SSD's are ...
11
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1answer
11k views

Ramdisk ubuntu 10.04

I'm using Ubuntu 10.04(64bit) for my desktop. The machine has a 5GB RAM. I want to use RAM disk(1G or 2G) but I don't know how can I do this. Is there any opensource product of RAM disk?
11
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2answers
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Want Visual Studio 2010 stop using the drive when there's lots of RAM in Windows 7 64 bit

I will be upgrading my system to use 16GB of DDR3 RAM in a Windows 7 64 bit and Visual Studio 2010 Ultimate. CPU will be 6 cores 3.2Ghz. I do lots of compiles/day and my goal for VS is to show a web ...
8
votes
7answers
7k views

When to use a RAM-Disk?

I know that RAM-Disk are fast, faster than any Disk but they lose their contents on a shutdown of the operating system. The capacity is limited to the RAM. Is there a useful implementation on a new ...
7
votes
1answer
7k views

What to put on RAMDisk on Windows?

I got a lot of RAM installed in my PC recently and I looked into this RAMDisk thing. There are two things I've found from my investigation: You should not mess with Windows native pagefile/memory ...
6
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1answer
3k views

What is the max. capacity of RAM in 32-bit machine? Why it is not 16GB? [closed]

This question is inspired from a question in stackoverflow here To what I know, for 32bit machines, we can have 2^32 combination set of instructions. so for a max capacity of a RAM in 32-bit ...
6
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2answers
5k views

How do I load Ubuntu into RAM and boot from it?

The Problem I have a USB flash drive which, among Windows PE and other things, has an Ubuntu 11.04 system on a virtual (file-based) partition: <drive>/ubuntu/disks/boot.disk mount point ...
6
votes
4answers
4k views

Is it possible to run Windows XP from a RAM disk?

I want to see if there are speed improvements running Windows XP entirely from RAM, as Damn Small Linux (Would it be Damn Small Windows?). I've seen Windows XP running from Live CDs and from Flash ...
5
votes
4answers
1k views

How to treat a new SSD--optimizations and longevity

I was hoping to compile a list of tips/tricks for optimizing and extending the life of SSDs. I just purchased my first SSD and put it in my laptop, and will soon be installing a pair into my desktop ...
5
votes
4answers
665 views

Can I use the unused 1G of 4G on a 32bit machine as a ramdisk?

I have a machine with 4G of RAM, but running 32bit windows 7, so can only see 3G. I have read somwhere recently that that unused 1G can be used as a RamDisk. Is this true? What sort of program allows ...
5
votes
1answer
6k views

Which filesystem to use for ramdisk?

I have 8 GB of RAM and would like to allocate about 1.5 GB for a ramdisk, mainly to use for Chrome and possibly some other things later. This guide says to format NTFS while this guide says to use ...
5
votes
2answers
1k views

Built-in RAM disk solution for Windows XP

I remember that back in the "good old days" of MSDOS a RAM disk driver was bundled with the "OS" and by doing some simple settings it was possible to configure it. Does Microsoft still supply this ...
5
votes
2answers
2k views

Install entire visual studio on ramdisk?

How would i go about installing visual studio 2010 and all of its dependencies entirely on a ramdisk? I have 16GB ram in my computer and a 4GB ramdisk just for visual studio. If i just try to ...
5
votes
2answers
1k views

What is the difference between ramdisk and ramfs?

Kindly tell me the difference between ramdisk and ramfs.
5
votes
2answers
5k views

Is using a Virtual PC on a RAM DISK super fast? (putting the .vhd file in a RAM DISK)

I wonder how or if any one tried to create a RAM DISK, and then put the 2GB (or sometimes 1.2GB) .vhd file into it, and then run the virtual PC using this image. It should be running super fast, as ...
5
votes
2answers
2k views

Best approach to utilize RamDisk for Chrome?

I use a lot of tabs and after a while less recently opened tabs take some time to become responsive, which I guess is because they're being un-cached to HDD as they're not required. So after ...
5
votes
1answer
1k views

Can I create a RAM disk using GPU Memory? [duplicate]

Possible Duplicate: Is it possible to use GPU memory as more main memory? I would like to create a RAM disk/drive using the GPU's RAM/memory. Then use ReadyBoost on Windows to use the disk ...
5
votes
2answers
4k views

How do I deallocate a Linux RAMDISK, e.g. /dev/ram0?

I've been playing with Linux RAMDISKs, as in the block device /dev/ram0. I understand that when I first start writing to one of these devices some RAM is allocated to it. How do I free the memory ...
5
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4answers
2k views

Why do virtual machine files on a ramdisk not run faster than on a physical disk?

I installed a total of 36 GB of memory (4x8 GB + 2x2 GB) onn the host (Windows 7) and I used ImDisk to create a 32 GB ramdisk and formatted it with an NTFS file system. Then I copied the virtual ...
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votes
7answers
7k views

write-through RAM disk, or massive caching of file system?

I have a program that is very heavily hitting the file system, reading and writing randomly to a set of working files. The files total several gigabytes in size, but I can spare the RAM to keep them ...
4
votes
3answers
21k views

4GB to 8GB RAM, what performance increase?

I am wondering whether it is worth upgrading from 4 GB to 8 GB of RAM. I know the question has been asked many times, but I can't transpose that to my case. I'm using Windows 7 64-bit. I did a test ...
4
votes
1answer
2k views

Create ram disk mount to specific folder in OSX

I am using a command like so to create a ram disk: diskutil erasevolume HFS+ "ram disk" `hdiutil attach -nomount ram://307200` This works succesfully, and I get a /Volumes/ram disk mounted on my ...
4
votes
1answer
162 views

No performance increase on I/O intensive operation after symlink to ramdisk

We have a system that transforms a set of several thousand multi-MB files. After every step in the transform, it writes the intermediate file to disk. The concept is similar to a scratch disk. We ...
4
votes
1answer
1k views

Ramdisk size limit in OS X Mountain Lion?

I tried this command to create a ramdisk sudo hdik -nomount ram://4194304 but it failed with the message hdik: attach failed: error 0x6e = 110 It works only if I decrease the size to about 1 GB. ...
4
votes
1answer
195 views

Spin down hard drive while on treadmill (or car or any other shaky environment)

I have a laptop with 8GB of RAM running Windows 7. Is it possible to completely shut off the hard drive while browsing the web? I use Firefox. I figure I would need to do this if I wanted to prevent ...
4
votes
10answers
3k views

Is there such a thing as a persistent ram drive?

I have a laptop with a LAMP setup. The HDD is slow, which causes my unit tests to run slowly. I was wondering whether I could mount the web root the mysql database on some kind of ramdisk. From what ...
4
votes
5answers
831 views

How can I create consistent snapshots of tmpfs?

How can I create consistent snapshots of tmpfs or any RAM disks?
4
votes
2answers
1k views

How can I automatically mount/unmount a ramdisk on a 64-bit Ubuntu server?

My Ubuntu server has 24GB of RAM. I want to automatically create a ramdisk on boot and load files from the /home/user1/ramdisk folder. When the system shuts down, I need to load files from ramdisk ...
3
votes
3answers
3k views

How to determine if a RAMDisk will be benificial and what to put on it?

How much RAM is necessary for a RAMDisk and how does one determine how much to allocate? Also what programs benefit from being put on a RAMDisk since the contents is lost when the machine is powered ...
3
votes
4answers
4k views

Can SSD raid be faster than ramdisk?

So a typical ssd will have a read speed of 250 - 500 mb / second. And a ram will have about 10x than that. My question is: Can 4 ssds with raid-0 be faster than a single ram memory block for some ...
3
votes
2answers
843 views

Will these 2 RAMs play nicely?

EDIT To the Original Question: I did some research and the old computer I discovered is a Dell Dimension 2400. According to the SPEC Sheet the RAM is PC2100 (266-MHz) or PC2700 (333-MHz) DDR SDRAM ...
3
votes
1answer
7k views

Is there any open-source RAMDisk software for Windows? [closed]

Question title is quite clear, no ? I found a bunch of "free for personnal use" ramdisk softwares on alternativesto but absolutely no open-source. So, do you know any one ?
3
votes
2answers
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Can you boot an operating system into RAM disk and how?

I would like to know whether and how you can setup a computer to boot into RAM. I have 16GB of DDR3 1600MHz RAM. Could it be done in Windows? If not, maybe in a light version of Unix? You'd have to ...
3
votes
2answers
1k views

Looking for Windows RAM Disk which mirrors writes to hard disk

I'm looking for a RAM disk (preferably free) which gets its contents from a specified folder on the hard disk and also writes changes made to it back to that folder. Is there such a thing for Windows? ...
3
votes
3answers
4k views

Preloading programs and files into ram? (Windows 7)

Now that I have 12 gigs of ram in my PC I'd like to make the most of it and minimize the disk access of the application/game I'm using while I use it so I'm wondering if there are some ways to preload ...
3
votes
1answer
872 views

How to install Windows on a ramdisk?

Nowadays 32 or even 64 GB of RAM in a PC is becoming accessible for the average Joe. Ideally I would like to be able to copy a fully working Windows 7 installation on DVDs or a Bluray disk and mount ...
2
votes
4answers
368 views

Has someone written (or is aware of) an instruction guide for setting up a RAMDisk and using it for pagefile.sys?

I was talking with a friend the other day about Windows in general and I mentioned that there is, unfortunately no way (that I was aware of) to disable the page file within Windows. Regardless of the ...
2
votes
4answers
2k views

Why doesn't my RAMDisk performance match my HDD's performance?

I've been thinking about using temporary GIT repositories on RAMDisks (using DataRAM's ramdisk) as a kind of object store. I was interested to see whether it was worthwhile, so I ran a simple ...
2
votes
2answers
293 views

Is it possible to create a file system on ram

I'm just wondering is there a technology like this?Transforming a Ram into a file system which makes file manipulation and transfer easier. A ram which can be partitioned. And which can temporarily ...
2
votes
3answers
474 views

which ZFS-like filesystem can optimize volume selection based on file access patterns?

Is there a redundant RAID/ZFS-like filesystem that can optimize the placement of files based on their access patterns? My goal is to build a desktop system that will automatically move files among a ...
2
votes
2answers
2k views

How to create a RAM disk - Fedora 17

How do I create a true RAM disk? I don't want a virtual file system with loop devices, I would like a mountable filesystem that is stored completely in RAM. I am using Fedora 17, linux ...
2
votes
3answers
671 views

OS X: Creating RAMDisk in root

How would I create a RAMDisk on OS X for a read-only filesystem, so that any attempted writes to the drive (which is read-only) are directed to the RAMDisk instead?
2
votes
1answer
1k views

Does it protect SSD by putting Chrome/IE cache into ramdisk?

I have bought a SSD, alloc 1G memory for ramdisk to save temp file of Chrome/IE. Does it reduce the i/o of SSD and enlarge the lifetime of SSD?
2
votes
1answer
131 views

What are the quality metrics for RAM?

I have searched RAM and I found there are given some specification for the same capacity RAM, What are the difference and performance comparison between these? Like RAM1 General Brand ...