[CentOS] Re: software raid

[Les Mikesell]

Feizhou wrote:
> 
>> Looking at the manual for that system, the drives are hot-swappable - 
>> even
>> with the onboard controller, but I am not sure if the linux software raid
>> supports hotswap. I guess you will have to test it.
>>
>>
> 
> Linux software raid cannot due to partitioning issues or rather its 
> support of partitions for raid devices. The disk might have to be first 
> partitioned before it can be added to the array whereas hardware raid 
> cards use the whole disk and do not have to worry about partitioning and 
> therefore can make use of the disk immediately without any squabbles.

You wouldn't necessarily want the md driver to automatically write on 
top of a new drive you added - unless you already had it included as a 
hot spare.

-- 
   Les Mikesell
     lesmikesell at gmail.com