2009/3/27 RedShift redshift@pandora.be
Mogens Kjaer wrote:
RedShift 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 ;)
d