RAID 0 confusion

[realzippy]

You have your RAID0 working?
Yesterday I spent 10 hours,now I know what to do...
leave a reply and I will tell you..

[aj7360]

Originally Posted by realzippy

You have your RAID0 working?
Yesterday I spent 10 hours,now I know what to do...
leave a reply and I will tell you..

I have had to put that "experiment" on hold due to motherboard problems.

But if you want to tell me I would love to know. I can try to get the RAID0 working on the old board.. an ASUS.

Such information is far too valuable to be lost!

[scottro]

realzippy, it's ALWAYS good to post how you got something working. As aj7360 said, such information is too valuable to be lost.

Especially if it took you ten hours--that means it might take the next person 10 hours as well.

So yes, please post it.

[realzippy]

Setting up a RAID0 during Fedora9 installation using Disk Setup (DiskDruid) with 2 harddrives.
It is important to disable any BIOS (fake-)RAID options for the disccontrollers.


1. Choose manually partition

2. In the next window you see your existing partitions.Delete all (also LVM,if exist)

3. When this is done,there should only be the 2 harddrives (sda,sdb) and their free space.

4. Create a /boot partition : Click "NEW",choose "/boot",select sda,fix size to 100 mB,
Set "Force to be a primary partition"

5. Create a /swap partition : Click "NEW",choose "/swap",select sda,fix size to the amount
of your RAM - 100 mB;e.g. if you have 1024 mB RAM,1024 - 100 = 924
Set "Force to be a primary partition"

6. Create another /swap partition : Click "NEW",choose "/swap",select sdb,fix size to the amount
of your RAM;e.g. if you have 1024 mB RAM,fix size = 1024
Set "Force to be a primary partition"

Why 2 Swaps?AFAIK there is an advantage to have swaps on both harddrives.There is no sense in
setting them to a RAID device.

7. Click the "RAID" button,choose "Create a software RAID partition"
For the File System Type choose "Software RAID", select sda,select "fill to maximum allowable size"
Set "Force to be a primary partition"

8. Click the "RAID" button,choose "Create a software RAID partition"
For the File System Type choose "Software RAID", select sdb,select "fill to maximum allowable size"
Set "Force to be a primary partition"

9. Click the "RAID" button,choose "Create a RAID device" .For the Mount Point choose " / "
For the RAID level choose,of course, "RAID0"; RAID Members must be sda and sdb.

Complete the Fedora installation.When it is done,you can test your read/write speed by opening a terminal:

Type su -l
Type password
Type hdparm -Tt /dev/md0
it should nearly be twice as fast as a single harddrive:
hdparm -Tt /dev/sda or hdparm -Tt /dev/sdb.

For a real RAID benchmark hdparm is not really the right tool;google for it!

Feel free to correct me,I am not a linux geek.

[aj7360]

Thanks. I will give it a try.

[aj7360]

Rats... it just locked up again.

Will have to start over with the install.. this time with a different PSU.

[aj7360]

Woo hoo!!!

Looks like it was the PSU... and the RAID 0 works!!

Thanks realzippy and scottro.

Now I just to wait to make sure it doesn't lock up.

[scottro]

Yes, thanks to realzippy for giving a very very nice detailed howto. I told ya it would be helpful.