LinuxQuestions.org
View the Most Wanted LQ Wiki articles.
Go Back   LinuxQuestions.org > Forums > Linux Forums > Linux - Server
User Name
Password
Linux - Server This forum is for the discussion of Linux Software used in a server related context.

Notices

Reply
 
Search this Thread
Old 11-24-2007, 11:26 AM   #1
rabh
LQ Newbie
 
Registered: Nov 2007
Posts: 4

Rep: Reputation: 0
Fedora 8 on Intel S3000AH Motherboard


Hi All,
I just assembled a server to work as a File server. I added 3 SATA HDDs in this system. I configured two logical drives as follows using Intel Embedded RAID (LSI MegaRaid):
1. Single 80GB HDD in RAID-0 mode (HDD attached to SATA port-0)
2. Two 400GB HDDs in RAID-1 mode (Disks on SATA ports 2 and 3)

When I try to install FC8 on this system, the FC8 sees all 3 disks as sda, sdb and sdc. I expect to see only two disks as the hardware RAID should present each logical disk as separate disk to OS.

Can someone help me in this. The help pages on Intel and LSI webpages show the drivers and insructions of RHEL3 and RHEL4.

Does anyone have experience with FC8 on this mother board with Hardware RAID enabled?

thanks and regards,
Ravi
 
Old 11-24-2007, 01:03 PM   #2
dkm999
Member
 
Registered: Nov 2006
Location: Seattle, WA
Distribution: Fedora
Posts: 407

Rep: Reputation: 35
I am sorry to report that you are bound to be disappointed. It seems from my searches on the Web that the Intel ICH7R chipset that provides "RAID support" on your board is, in fact, FakeRAID, and will be of little or no use to you when running a Linux OS. Intel itself notes on its website that, for 2.6 kernels, the functionality is provided by dmraid. Here is the link: http://www.intel.com/support/chipset.../CS-020663.htm.

Fortunately, the all-software RAID support in 2.6 kernels is pretty robust, and should handle your situation straightaway. I have recently been down this path with another chipset that claimed RAID support, and that is where I ended up.

Setting up RAID is described in the Fedora Installation docs, in the chapter on Disk Druid. I ended up defining a separate RAID set for each partition, although I have read recently that you can arrange things to handle several partitions using LVM to aggregate them onto a single RAID set.

Parenthetically, I don't understand how you are going to get any satisfaction out of using a single spindle ("in RAID-0 mode"). RAID-0 is supposed to stripe data onto two or more drives; even if you partition the 80GB device into two logical drives, you will still have a single point of failure, and there will be no speed advantage, because the data will still all have to be written to the single drive. In fact, there might well be a slow-down, because of the need to move the heads a considerable distance to switch between the two partitions for every write or read.
 
Old 11-24-2007, 09:45 PM   #3
rabh
LQ Newbie
 
Registered: Nov 2007
Posts: 4

Original Poster
Rep: Reputation: 0
Thanks for the reply. I was thinking that this board uses LSI's megaraid chip which is a hardware RAID.

Regarding RAID-0 on single disk, this is how the RAID BIOS shows single disk when configured as a logical disk array.

Now I am planning to disable RAID in the BIOS and use Linux software RAID to create a RAID-1 array from sdb and sdc of 400GB.

regards,
Ravi
 
  


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
Kubuntu 6.06.1 + compiz on Intel 915 Motherboard with Intel i810 driver devghai Ubuntu 1 07-16-2007 10:55 AM
does red hatlinux 9 support intel core 2 duo and intel DG965RY motherboard sa_2400 Linux - Hardware 8 07-11-2007 12:13 PM
Intel D975XBX motherboard cizzi Linux - Hardware 1 01-28-2007 04:18 PM
Fedora installation on SATA and 102 Intel motherboard balkrishna_29 Fedora - Installation 1 10-03-2006 10:02 PM
No sound on intel 915G based motherboard with fedora core 3 alsa 1.0.9 sourangshu Linux - Hardware 1 06-07-2005 04:58 PM


All times are GMT -5. The time now is 04:36 PM.

Main Menu
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
identi.ca: @linuxquestions
Facebook: linuxquestions Google+: linuxquestions
Open Source Consulting | Domain Registration