Questions on Partitioning across two drives

[Jim]

Kevin J. Cummings wrote:
> Jim wrote:
>> Patrick W. Barnes wrote:
>>> On Sunday 10 May 2009 18:04:35 Jim wrote:
>>>  
>>>> I have a EeePC 1000 with two SSD drives and Fedora 10.
>>>> I want to make /  partition larger
>>>> sda1 / 8gb
>>>> sdb1 /home 32gb
>>>>
>>>> I want to make /home 20gb
>>>> I want to make /   20gb
>>>>
>>>> I have  made sdb1 /home 20gb with Gparted and I made with the
>>>> unallocated space a   / ext3 primary partition.
>>>> how do I make that / partition to join with the /  on  sda1 ?
>>>>     
>>>
>>> You will have to create a software RAID0 device that spans across 
>>> both drives and includes all of the space you want used for /, then 
>>> create a new partition for / within that RAID device.
>>>
>>>   
>> What Raid Type would I use ?
>>
>
> You have 2 choices:
>
> 1) Create a RAID-0 partition which spans both drives.  This results in 
> a single partition.  The drives need to be the same size in order for 
> the striping to work.  These drives are not the same size.  You could 
> stripe the first 8GB for a 16 GB partition, but it would leave you 
> with a 24 GB 2nd partition on sdb, 16/24 is not quite what you want.
>
> 2) Use LVM to merge the 2 physical partitions into a single logical 
> volume which spans both drives.  Since both logical partitions can be 
> allocated out of the single logical volume, you can make them whatever 
> size you need (ie, both of 20GB should be doable).
>
I can make both partitions the same .
sda1 8gb
sdb2  8gb
Total 16gb for /
 
And put the remainder in sdb1 /home.
 
I guess I will settle for a Raid 0

But how would a  Raid 5 do ?