Thanks!

-----Original Message-----
From: z [mailto:[EMAIL PROTECTED]]
Sent: Thursday, December 19, 2002 12:59 AM
To: [EMAIL PROTECTED]
Subject: Re: RedHat 7.3 with RAID 5


Hong Tian wrote:
> Hi,
> 
> I want to install Red Hat 7.3 with RAID 5 (not RAID 0/1) on a Dell
PowerEdge
> 2550 machine. Does anyone knows how to do it or where can I find good
> documentation about it?
> 
> Thanks,
> Hong
> 
> 
> 
> 

Assuming you mean software raid, it's easy! :) (... i remember the old 
days of raidtools) (actually hardware raid is easy too, but has little 
to do with linux beyond having a redhat supported raid adapter)

The basic idea is just to make "raid" partitions on each drive. Then 
combine the like partitions into raid devices.

I'll give an example as if you have three disks; sda, sdb, and sdc.

Determine your partition layout. Maybe you want just swap, root, and 
boot partitions. Without raid, you'd make 1 linux swap partition (type 
82 in fdisk), and two linux partitions (type 83) on /dev/sda

/dev/sda1       82      swap
/dev/sda2       83      /boot
/dev/sda3       83      /

To do the raid, do the same thing except the linux partitions will be 
raid partitions (type fd in fdisk), and you'll have multiple disks with 
the same partition layout.

/dev/sda1       82      swap
/dev/sda2       fd      /boot
/dev/sda3       fd      /

/dev/sdb1       82      swap
/dev/sdb2       fd      /boot
/dev/sdb3       fd      /

(and so on)

Then when you get to the screen that asks you to assign mount points, 
there is a button that says "make raid device" - using that you can 
group the raid partitions together, making "md" devices. And you can 
assign mount points to those. So after you combine the raid devices, and 
assign mount points, your table will look something like:

/dev/sda1       82      swap
/dev/sdb1       82      swap
/dev/sdc1       82      swap
/dev/md0        RAID    /boot
/dev/md1        RAID    /

Hope it helps,
z

// ps
// now that i'm thinking, i bet if you just check the redhat.com site
// and look in the Support and Docs area... the manuals probably give
// a better explaination. ah well... luck either way.





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