[WBEL-users] How to set up a RAID-1 on a new box

[Scott Silva]

Alon wrote:
> Hi Y'all,
> 
> I've done it before,. but beats me how I've done it.
> 
> 
> I have a new dual xeon server.
> It has two 80GB SATA HDs and 4GB of RAM.
> 
> I need to partition the HDs in a RAID-1 with the following partitioning:
> 
> /              1000MB     ( 1GB)     -   Exact size   -   Does this need
> to be primary?
> /boot      1000MB     ( 1GB)     -   Exact size   -  Does this need to
> be primary?
> /var       40000MB    (40GB)     -   Exact size   -  Does this need to
> be primary?
> /usr       10000MB    (10GB)      -   Exact size   -  Does this need to
> be primary?
> /home   10000MB    (10GB) (fill to maximum)  - Does this need to be
> primary?
> /tmp         4000MB    ( 4GB)      -   Exact size   - Does this need to
> be primary?
> /swap      4000MB    (  4GB)     -   Exact size   -  Does this need to
> be primary?
> 
> I have respin-1 (I will download respin-2 in a day or two, but the
> install process should be the same):
> 
> What are the steps to make this happen?
> 
> The plan is to have a Mirrored HDs solution for a HD fail situation.
> 
> When using the installer of disk 1, I'm being prompted with the Manuall
> Partitioning.
> 
> My question is as follow:
> 
> sda 80GB
> sdb 80GB
> 
> How do I go about installing it?
> 
>> From previous install I think I had to declare each partition on 'sda'
>> and 
> 
> then declare it again (same size) in 'sdb' and
> then 'magically' tell them about each other and have give birth to an  
> mdx device.
> 
> I'm using ext3.
> 
> I tried to create everything in sda. No problem.
> But when attempting to create sdb,.. I'm being prompted with 'partition
> already exists' (as  /var was already created in sda).
> Do I need to give it a different naming convesion?
> 
> for instance:
> 
> /              1000MB     ( 1GB)     - in sda it will be called      /a
> and in    sdb it will be called    /b
> /boot      1000MB     ( 1GB)     - in sda it will be called      /boota
> and in    sdb it will be called    /bootb
> /var       40000MB    (40GB)     - in sda it will be called      /vara
> and in    sdb it will be called    /varb
> /usr       10000MB    (10GB)      - in sda it will be called      /usra
> and in    sdb it will be called    /usrb
> /home   10000MB    (10GB)     - in sda it will be called      /homea and
> in    sdb it will be called    /homeb
> /tmp         4000MB    ( 4GB)     - in sda it will be called      /tmpa
> and in    sdb it will be called    /tmpb
> /swap      4000MB    (  4GB)     - in sda it will be called      /swapa
> and in    sdb it will be called    /swapb
> 
> 
> ??
> 
> Or,. am I missing it entirely and the process should be entirely different?
> Can someone walk me through the process?
> 
> 1. Add the partitions to sda using ext3
> 2. Click on  RAID button and select Create RAID..       Something like
> that.
> 
> I don't have the system in front of me - the server is at the NOC, and
> I'll only be there again tomorrow morning.
> However, I remember the menus pretty good after many failed attempts.
> 
> I appreciate the help on this.
> 
> 
> 
> - Alon
> js at wsco.com
http://www.tldp.org/HOWTO/Software-RAID-HOWTO.html
and particularly chapter 11 which is LVM on Software raid. It is a lot
easier, especially if you ever have to change the sizes of partitions later.


-- 
"If you have ever eaten crow,
It don't taste like chicken!!"