Re: [CentOS] Installing on partitionable RAID arrays

D Tucny wrote:

 > ...
 >>  Not only do you
 >> have to execute 4 times as much commands, reconstruction of the 4
 >> arrays will take place in parallel leading to slow disk access
during
 >> reconstruction.
 >
 > Is this right?
 >
 > When I have replaced a disk and added several partitions
 > to an array, the rebuild is done one partition at a time.
 >
 > The /proc/mdstat would say "delayed" on the partitiones
 > waiting.
 >
 > Mogens

I must be mistaken then, it's been a long time since I've used
regular md devices.

I can confirm this and furthermore, the default sync max transfer rate is very low for modern disks, so unless you've increased it to speed up sync or you have a very heavy disk workload, it's probably not going to impact normal disk access that much...

That said... I'd much prefer partitionable arrays from a management point of view... It's how all the hardware solutions work and they can't all be wrong ;)

And if someone is thinking of changing things, what would really be nice would be a default install on a single disk where you could add the mirror disk later and sync it in. Is that possible?