2009/3/27 RedShift <redshift@xxxxxxxxxx>
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
Mogens Kjaer wrote:I must be mistaken then, it's been a long time since I've used regular md devices.
> 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 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
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