LinuxQuestions.org
Support LQ: Use code LQ3 and save $3 on Domain Registration
Go Back   LinuxQuestions.org > Forums > Linux Forums > Linux - Newbie
User Name
Password
Linux - Newbie This Linux forum is for members that are new to Linux.
Just starting out and have a question? If it is not in the man pages or the how-to's this is the place!

Notices


Reply
  Search this Thread
Old 06-03-2006, 02:35 PM   #1
GottaBuild
LQ Newbie
 
Registered: Jun 2006
Posts: 1

Rep: Reputation: 0
Knoppix live CD file system questions


Hello. I am running Knoppix live CD on a pc with no hard drive and 1GB memory. When the OS loads, I see it is building a small ram drive. I also sometimes uses the "toram" parameter and then Knoppix uses up about 800mb of memory. SO my questions are:

1) What file system is Knoppix using in the ram drive?
2) Is the ram drive ever used for kernel operations or is it just for higher level stuff like reference files and program modules? In other words, is the entire kernel loaded into regular memory, or is some of it loaded onto the ram drive portion of memory?

Many thanks for any feedback!
 
Old 06-05-2006, 10:52 AM   #2
David the H.
Bash Guru
 
Registered: Jun 2004
Location: Osaka, Japan
Distribution: Debian sid + kde 3.5 & 4.4
Posts: 6,823

Rep: Reputation: 1957Reputation: 1957Reputation: 1957Reputation: 1957Reputation: 1957Reputation: 1957Reputation: 1957Reputation: 1957Reputation: 1957Reputation: 1957Reputation: 1957
I know next to nothing about Knoppix actually, but seeing as nobody else has tried answering this, I'll give it my guess.

I would guess that Knoppix uses the ramdrive for its base running filesystem, including all the major files it needs to run as well as whatever files and programs you create during that session. So it probably holds a large part of the root filesystem, at the very least. The kernel is probably held in regular memory, however, like in most systems. The ramdrive probably uses the standard ramfs filesystem as its base.

The ramdrive is then merged with the cd filesystem using unionfs, which makes the two separate drives look as if they were one contiguous file system. The ramdrive part holds the files that can be changed, while the unchangable stuff remains on the cd. The result is a file system that can be mostly held outside of memory, but can still be altered when necessary. If you load everything into memory with toram, however, then the ramdrive will also hold everything that's normally accessed from cd, freeing the drive for other uses.

Remember, this is just my semi-educated guess here. I wouldn't be surprised if I was completely wrong. But I think that's the general idea.
 
  


Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is Off
HTML code is Off



Similar Threads
Thread Thread Starter Forum Replies Last Post
How to play Internet Media file with live Knoppix 4.0 AskMe Linux - Software 1 12-03-2005 03:19 AM
Knoppix/Other Live CD mhelliwell Linux - Distributions 3 02-28-2005 06:23 AM
Nvidia Driver Installation on Live(Ram-based system, like slax/knoppix) drdroid Linux - General 3 06-17-2004 05:23 PM
run quotacheck on the live file system stand Linux - General 3 01-06-2004 09:11 AM


All times are GMT -5. The time now is 11:14 AM.

Main Menu
Advertisement
My LQ
Write for LQ
LinuxQuestions.org is looking for people interested in writing Editorials, Articles, Reviews, and more. If you'd like to contribute content, let us know.
Main Menu
Syndicate
RSS1  Latest Threads
RSS1  LQ News
Twitter: @linuxquestions
Facebook: linuxquestions Google+: linuxquestions
Open Source Consulting | Domain Registration