RH AS Enterprise v3 and mirroring the boot disk

[Ratzie]

I have 4 73 GB drives that I want to mirror, so Drive 3 will mirror dirve 1, and drive 4 will mirror drive 2.

Does RH AS Enterprise v3 allow mirroring of the boot or / drive? Off the hop on installation?

[Jean-Luc Oudart · Accepted solution]

Hi,

follow the link :
http://jamesthornton.com/redhat/linux/6.2/Reference-Guide/ch-raid.html

Is this any help to you ?

Regards,
Jean-Luc

[Ratzie]

Is there a difference between the software RAID and LVM?

Or is that the only way I can RAID my drives is thru the Software RAID?

What is the advantage of using LVM?

[Jean-Luc Oudart]

LVM can sit on top of RAID.
RAID will give you the resilience (RAID1 - mirroring for your boot drive).

LVM will give you the disk management

http://www-106.ibm.com/developerworks/linux/library/l-lvm/
http://www.aplawrence.com/Linux/lvm.html

Regards,
Jean-Luc

[Steven E. Protter]

Yes.

The easiest way to do it is with disk druid during initial installation.

You set up softare raid and then build the filesystems. Its point and click and very reliable.

It can be done with OS commands after the fact. Let me know if you need them, I can try and find them for you. You can guess which methodoloy I used huh?

SEP

[Ratzie]

Why is it when I create a software raid partition it asks me for a mount point?

What would be the default...

I used /

Is this right.

What are the advantages of using LVM over just creating a partition in disk druid?

[Steven E. Protter]

I see we're using disk druid.

For Raid 1, which is total mirror copy.

You create a software raid device on the first disk.

You don't have to assign a mount point.

You create another software raid device and then you have the option of assigning a mount point.

The process i went through was this.

Plan the space

My list was for example:

/ 1024 MB
/var /4096 MB

So I do a software raid 1024 on disk a
A software raid of 1024 in disk b

Create mirror with a mountpoint:

assign mount point of / to the software raid area that now is on disk a and b

Same thinig for /var

subsequent filesystems.

Red Hat could make this easier.

It took me a few failed tries to get it right.

SEP

[Ratzie]

Thanks