LinuxQuestions.org
Latest LQ Deal: Linux Power User Bundle
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 04-12-2007, 06:14 PM   #1
Just Jon
LQ Newbie
 
Registered: Apr 2007
Distribution: Undecided!
Posts: 10

Rep: Reputation: 0
Linux distro for dual boot, on a RAID array


I'm using Fedora at the moment, and I'm not quite happy with it, software issues.

I chose this distro as it saw my 'fake' RAID array, and installed on it with no fuss. I tried getting Ubuntu (I liked that distro too ) to install on the array previous to trying Fedora - no joy!

If anyone could point me towards other distro's that'll install on my rig, without me having to mess about, it'd be a great help.

Thanks,

JJ.
 
Old 04-12-2007, 07:31 PM   #2
forrestt
Senior Member
 
Registered: Mar 2004
Location: Cary, NC, USA
Distribution: Fedora, Kubuntu, RedHat, CentOS, SuSe
Posts: 1,288

Rep: Reputation: 99
It might be easier to resolve your software issues. There isn't any certainty that a different distro won't have the same problems. What are the software issues you are having?
 
Old 04-12-2007, 07:51 PM   #3
Chi-doc
LQ Newbie
 
Registered: Apr 2007
Posts: 6

Rep: Reputation: 0
Quote:
Originally Posted by forrestt
It might be easier to resolve your software issues. There isn't any certainty that a different distro won't have the same problems. What are the software issues you are having?
Yes, I agree with forrestt
 
Old 04-13-2007, 05:05 AM   #4
Just Jon
LQ Newbie
 
Registered: Apr 2007
Distribution: Undecided!
Posts: 10

Original Poster
Rep: Reputation: 0
Cheers guys.

The problems I'm having? Well, if I use desktop effects, all windows open at the upper left of my screen, hiding the menu bar, and the min, max, and close buttons. It took me a day to find out I could hold Alt and drag windows (!), but having to do this is not good.

Opera has developed a phobia, and will not play! It refuses to start, it has been working fine, and now isn't. I've tried re-installing it, to no avail. Firefox, nah. dont like using it for some reason. Have used Opera for the past year.

Beryl is installed, it wont do a thing, I cant even change themes with Emerald.

I'm really hoping that there's another distro I can try. I dont mind breaking things - good job really!
 
Old 04-13-2007, 07:14 AM   #5
jogl_z_8
Member
 
Registered: Oct 2005
Location: SW Ontario Canada
Distribution: Debian
Posts: 109

Rep: Reputation: Disabled
I've been using Debian. I had some difficulties with Woody and Sarge, but since I started using Etch it has been good. Easy installs, everything works, etc.

Just curious because I need to set up RAID and backup on my file server, what is fake RAID? Is it RAID 1?

Good Day,
JP.
 
Old 04-13-2007, 07:25 AM   #6
jschiwal
LQ Guru
 
Registered: Aug 2001
Location: Fargo, ND
Distribution: SuSE AMD64
Posts: 15,733

Rep: Reputation: 671Reputation: 671Reputation: 671Reputation: 671Reputation: 671Reputation: 671
Quote:
Originally Posted by jogl_z_8
I've been using Debian. I had some difficulties with Woody and Sarge, but since I started using Etch it has been good. Easy installs, everything works, etc.

Just curious because I need to set up RAID and backup on my file server, what is fake RAID? Is it RAID 1?

Good Day,
JP.
The raid controllers found on motherboards are in reality software raid, and use the CPU to handle the data, interupts and the checksum calculations, whereas a SCSI raid controller will perform all of the functions without loading down the system. Even ATA raid controller cards tend to be fake raid. SATA raid cards are OK except for the Promise raid controller card which uses the CPU to handle the redundancy calculations.

---

You could also consider raid 0 to be fake raid. It simply concatenates multiple drive into a single drive. It would be better to use LVM instead.

Last edited by jschiwal; 04-13-2007 at 07:28 AM.
 
Old 04-13-2007, 08:15 AM   #7
jogl_z_8
Member
 
Registered: Oct 2005
Location: SW Ontario Canada
Distribution: Debian
Posts: 109

Rep: Reputation: Disabled
So when you say fake RAID you mean RAID that your main CPU is involved in processing (software required). "Real" RAID would be a dedicated card in a slot or a special controller on the mother board.

Right?

Thanks,
JP.
 
Old 04-13-2007, 08:33 AM   #8
Just Jon
LQ Newbie
 
Registered: Apr 2007
Distribution: Undecided!
Posts: 10

Original Poster
Rep: Reputation: 0
That's the way I've been looking at it JP.

I did have a seperate HDD to use, that was donated to my son. It'd solve my probs, but not the earache from my son not having all his games installed. So it's either find another distro, or forget about Linux, and I dont want to do that.
 
Old 04-14-2007, 05:59 PM   #9
jschiwal
LQ Guru
 
Registered: Aug 2001
Location: Fargo, ND
Distribution: SuSE AMD64
Posts: 15,733

Rep: Reputation: 671Reputation: 671Reputation: 671Reputation: 671Reputation: 671Reputation: 671
Quote:
Originally Posted by jogl_z_8
So when you say fake RAID you mean RAID that your main CPU is involved in processing (software required). "Real" RAID would be a dedicated card in a slot or a special controller on the mother board.
Yes, instead of a raid controller, you actually have a drive controller, with many raid features implemented in software. The raid array on the disk isn't fake; the controller is faking it. This is partly due to the differences between an ATA vs SCSI controller. SCSI uses an actual bus and doesn't need to utilize the CPU to perform file transfers. For example, our old inserters at work would use scsi to transfer video files to the video decoders via the SCSI bus. The inserter machine was only Pentium II grade, so there would have been no way to do it without using SCSI devices.

However I would call a raid-0 array a fake raid array.

Last edited by jschiwal; 04-14-2007 at 06:00 PM.
 
Old 04-14-2007, 06:10 PM   #10
Just Jon
LQ Newbie
 
Registered: Apr 2007
Distribution: Undecided!
Posts: 10

Original Poster
Rep: Reputation: 0
So I was right in my OP.

Do any other distros support a fake RAID array 'out of the box' appart from Fedora?

Last edited by Just Jon; 04-14-2007 at 06:12 PM.
 
Old 04-14-2007, 06:10 PM   #11
Quakeboy02
Senior Member
 
Registered: Nov 2006
Distribution: Debian Squeeze 2.6.32.9 SMP AMD64
Posts: 3,289

Rep: Reputation: 126Reputation: 126
There is a way to install Debian/Ubuntu etc on fake RAID, but it's not straighforward. For some reason, Debian, even in Etch, hasn't put dmraid in the installer by default. It's there, but it's an older version and the partition manager doesn't recognize anything in /dev/mapper. Don't get me wrong: I'm a staunch Debian user, but this is something that kind of lets us down a bit.

https://help.ubuntu.com/community/FakeRaidHowto

Last edited by Quakeboy02; 04-14-2007 at 06:11 PM.
 
Old 04-14-2007, 06:31 PM   #12
Just Jon
LQ Newbie
 
Registered: Apr 2007
Distribution: Undecided!
Posts: 10

Original Poster
Rep: Reputation: 0
Quote:
Originally Posted by Quakeboy02
There is a way to install Debian/Ubuntu etc on fake RAID, but it's not straighforward.
No **** That's some scary text my eyes have just scanned!

Cheers any way Quakeboy02

I tried another guide that used 'mdadm' while using Ububtu (alternative), I had no joy. I'm just not able to understand Linux at that level just yet, and I have a working rig (now) that I can't afford to mess up because of failure to be able to comprehend the methods required.
 
Old 04-14-2007, 06:47 PM   #13
Quakeboy02
Senior Member
 
Registered: Nov 2006
Distribution: Debian Squeeze 2.6.32.9 SMP AMD64
Posts: 3,289

Rep: Reputation: 126Reputation: 126
Be aware that when using mdadm to make a bootable RAID, you must put a separate "/boot" primary partition on the first drive.

Last edited by Quakeboy02; 04-14-2007 at 06:48 PM.
 
Old 04-14-2007, 07:42 PM   #14
Electro
LQ Guru
 
Registered: Jan 2002
Posts: 6,042

Rep: Reputation: Disabled
A hardware RAID controller is not a dedicated card. It is but it is not quite true. A hardware RAID controller contains a processor, RAM, storage controller chip, an optional XOR chip, and any miscellaneous chips to improve RAID performance. Software RAID controllers contains only the storage controller chip and software that contains RAID instructions to be copied to the main system's memory. Yes, hardware RAID controllers have a higher count of chips, but this not always the case. All the chips can be embedded in one chip and telling the difference gets harder. You have to accept the honesty of the controller brand or read the CPU usage to tell the difference. Another way to tell is the cost of the controller. Usually hardware RAID controllers cost +150 US dollars while software RAID controllers are a lot less.

RAID-0 is a type of RAID level. RAID-5 is another type of RAID level. Neither of these levels have nothing to do what is software RAID and what is hardware RAID.

Hardware RAID controllers does make a lot easier to use an OS with out causing a lot of problems like booting. 3ware controllers works in Linux with out any special software. The kernel version 2.6.14 and up supports all 3ware controllers. You can go from Windows to Linux and Linux to Windows with out any problems with the 3ware controller. You can also upgrade the kernel with out worrying if the software for 3ware can be compiled.
 
  


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
Dual Boot with HighPoint RAID Array 241comp Linux - Software 9 07-23-2009 06:57 PM
Dual boot winxp/ubuntu on raid array and ide drive buildintechie Linux - General 1 10-24-2005 11:35 PM
Dual-booting on an existing WinXP Raid 1 array?? bobbryce Fedora - Installation 1 06-28-2005 01:51 PM
Dual Boot w/ RAID array pacmanhat Linux - Newbie 1 06-10-2005 12:20 PM
Dual booting Linux and Windows XP on a SATA RAID 0 Array. Zygar Linux - Newbie 1 12-17-2004 08:45 AM


All times are GMT -5. The time now is 05:40 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