How do I make and mount a ramdisk from a root shell?

In news:3F9882D4.E8C2336D@ozemail.com.au,
M. K. <mkup@ozemail.com.au> rambled:

> How do I make and mount a ramdisk from a root shell?

You look it up on google you lazy bastard, do your own work.

Billy

M. K. wrote:

> How do I make and mount a ramdisk from a root shell?

man 4 ram
http://www.linuxfocus.org/English/No...rticle124.html

--
Old Man

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On Fri, 24 Oct 2003 11:39:33 +1000, M. K. <mkup@ozemail.com.au> wrote:
> How do I make and mount a ramdisk from a root shell?

I just use /dev/shm, myself.

--
Rob | If not safe,
Email and Jabber: | one can never be free.
athlonrob at axpr dot net |
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AthlonRob wrote:

> I just use /dev/shm, myself.

Wow!

mount -t tmpfs tmpfs /dev/shm

How easy is that! And I had no clue it existed. This is why I read this
group. Thanks.

--
Old Man

Let's review, shall we?

-----------------------------------------

LINUX:

mount -t tmpfs tmpfs /dev/shm

-----------------------------------------

WINDOWS 2000:

Download Ramdisk.exe from
http://download.microsoft.com/downlo...01/1/NT5/EN-US
/Ramdisk.exe and hope that it doesn't have a security flaw or fatal bug
- no source, so you don't know what's in it.

Extract the contents to a "folder."

Open up Control Panel

Select Add New Hardware

Select Other Device

Select Have Disk

Select the .inf file in the "folder" you extracted ramdisk.exe to.

Back up your registry

Use regedit to go to
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Servic es\Ramdisk\Parameters

Edit DiskSize key to the size you want.

Edit DriveLetter key to the drive letter you want.

Use regedit to go to
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Servic es\AFD

Edit ImagePath key to match the drive letter you chose

Use regedit to go to
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Servic es\Tcpip

Edit ImagePath key to match the drive letter you chose

make a batch file named tcp.bat containing:

copy c:\winnt\System32\DRIVERS\tcpip.sys Z:\
copy c:\winnt\System32\DRIVERS\afd.sys Z:\
net start afd
net start tcpip
net start dhcp
ipconfig
pause

(Use the drive letter you chose before)

Save as tcp.bat in your startup folder.

(Windows will probably save it as tcp.bat.txt and hide the .txt
from you. Fix this)

Reboot with Zone Alarm or other firewall disabled. Note that
Windows 2000 will take an extra three minutes or so to boot
and that you may see erropr messages that (we hope) will go
away later when you set up the snapin.

VerIfy that the ramdisk works. Troubleshoot as needed.

remove the ipconfig and pause lines from tcp.bat

rename tcp.bat to tcp.cmd

move tcp.cmd from your startup folder to your root folder.

Run the Microsoft Manangement Console.

Press CTRL+M

Select Add/Remove Snap-In

Select Add to add tcp.cmd as a snapin.

Select Select Local Computer Policy

Select Computer Configuration

Select Windows Settings

Select Scripts

Select Startup/Shutdown

Select Startup

Select Startup Properties

Select Add a Script

Type in the path to tcp.cmd

Click OK twice.

Reboot, test, and troubleshoot any programs that tank when
a drive letter is added or removed.

-----------------------------------------

Aren't you glad that Windows is easy to use, not like that
hard-to-use Linux?


(Disclaimer: I got the above procedure from
http://dslnuts.com/ramdisk.shtml, but was not brave enough
to try it on my fragile Windows 2000 installation. Don't
blame me if you hose Windows.)



--
Guy Macon, Electronics Engineer & Project Manager for hire.
Remember Doc Brown from the _Back to the Future_ movies? Do you
have an "impossible" engineering project that only someone like
Doc Brown can solve? My resume is at http://www.guymacon.com/

Cool. You can even do stuff like "mount -t tmpfs tmpfs /tmp"

Old Man wrote:

> AthlonRob wrote:
>
> > I just use /dev/shm, myself.
>
> Wow!
>
> mount -t tmpfs tmpfs /dev/shm
>
> How easy is that! And I had no clue it existed. This is why I read this
> group. Thanks.
>
> --
> Old Man

On Sat, 25 Oct 2003 11:27:19 +1000, M. K. <mkup@ozemail.com.au> wrote:
>
>
> Cool. You can even do stuff like "mount -t tmpfs tmpfs /tmp"
>
> Old Man wrote:
>
>> AthlonRob wrote:
>>
>> > I just use /dev/shm, myself.
>>
>> Wow!
>>
>> mount -t tmpfs tmpfs /dev/shm
>>
>> How easy is that! And I had no clue it existed. This is why I read this
>> group. Thanks.
>>
>> --
>> Old Man
>

ramdisks are pretty simple


dd if=/dev/zero of=/dev/ram0 count=foo bs=foo
mke2fs /dev/ram0
mkdir ~/ram # arbitrary choice of names
mount /dev/ram0 ~/ram

Copy whatever files you want to it (including an entire Linux OS)

--
Alan C
Post validation at http://tinyurl.com/rv0y

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On Sat, 25 Oct 2003 11:27:19 +1000, M. K. <mkup@ozemail.com.au> wrote:
> Cool. You can even do stuff like "mount -t tmpfs tmpfs /tmp"

That wouldn't be such a great idea, though. Sometimes big stuff gets
put in /tmp...

Right now my server has 244MB of stuff in /tmp, my desktop about 4MB,
and my laptop about 17MB. I definitely couldn't afford to lose 244MB of
RAM like that, nor would I want to lose 17MB on my laptop.

(FWIW, the server's /tmp stuff is from rebuilding openssh and openssl)

--
Rob | If not safe,
Email and Jabber: | one can never be free.
athlonrob at axpr dot net |
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On Fri, 24 Oct 2003 19:16:51 -0700,
AthlonRob <junkmail@axpr.net> wrote:
> On Sat, 25 Oct 2003 11:27:19 +1000, M. K. <mkup@ozemail.com.au> wrote:
>> Cool. You can even do stuff like "mount -t tmpfs tmpfs /tmp"
>
> That wouldn't be such a great idea, though. Sometimes big stuff gets
> put in /tmp...

I'd disagree. I've used a tmpfs /tmp for quite some time, so it can be
clear on reboot.

> I definitely couldn't afford to lose 244MB of
> RAM like that, nor would I want to lose 17MB on my laptop.

You don't really lose it. When the RAM is needed by something else, the
tmpfs goes in to swap. My swap is hardly used for anything else, so this
is okay by me, but I can see why some people wouldn't like this.

--
Mark Hill <usenet@mark.ukfsn.org>
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