Re: Newbie question on mdadm

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On Fri, 15 May 2020 at 23:09, Tim via users <users@xxxxxxxxxxxxxxxxxxxxxxx> wrote:
On Fri, 2020-05-15 at 10:28 -0700, Samuel Sieb wrote:
> This is not so surprising when you realize that most NAS boxes run
> Linux.

Though it can be surprising to find out how they've used a drive.  Such
as a 4TB WD MyCloud that provides that 4TB using two 2TB partitions on
the *same* drive, using RAID to make them one 4TB.  I dunno why they'd
do it that way.

If you control the hardware you get more options.  I've opened up dozens
of older drives to destroy platters, and they all had one actuator shared by 
all the heads.   Maybe the WD drives have two actuators, so are effectively
2x2TB drives on one case.   This has been investigated in the past:


and wasn't cost effective, but now we have:


--
George N. White III

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