Re: raid1 on HDD + RAM ?

[David Greaves <david@dgreaves.com>]

Janek Kozicki wrote:
> David Greaves said:     (by the date of Tue, 30 Sep 2008 18:09:57 +0100)
> 
>>> They would automatically sync on boot-up of the computer.
>> You'd need to create and --add the ramdisk...
> 
> ok, I'll figure this out :)
> 
> 
> 
>>> I'm asking because an ultra-fast READ and normal WRITE would be
>>> useful for me...
>> Also look at the --write-mostly and --write-behind options in mdadm.
> 
> thanks, this is great news for me. For real use I will need to
> repartition my hard drive - to create another partition for that.
> 
> But just for testing - will it work if mdadm will use LVM partition,
> which is already on top of mdadm raid ?
yes, absolutely.

md works with *any* block device.

> Or maybe just use some huge file as a loopback device? 
> 
> Which testing method is better?
Since you are intending not to use the device then they should be the same.
I'd use an lvm partition though.

David



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