i think make two very big raid 0
and after raid1
is better

using raid10 you can use some layouts (how data is write on same raid
system (for raid1 part of raid10), first disk write from head 0 to
last head, second disk write from last head to head 0)

2011/1/31 CoolCold [off-list ref]:

On Mon, Jan 31, 2011 at 12:41 PM, Mathias Burén [off-list ref] wrote:

quoted

Hi,

RAID10 is (could be) setup in this way, correct?

2 devices in a RAID1
2 devices in another RAID1

I usually use LVM striping over two RAID1 arrays for this.

quoted

Then you run RAID0 on top of them. If you're lucky you can lose 2
devices at most (1 in each RAID1).

If you have, say 6 HDDs, would you create 3 RAID1 volumes? Then create
a RAID0 on top of them?

How would one go about expanding a 4 HDD RAID10 into a 6 HDD RAID10?
Is it "just" a matter of creating a new RAID1 array of the 2 new HDDs,
then adding them to the RAID0, then expanding whatever is on that
(lvm, xfs, ext4)?

Are there any design tips, or caveats? For example, how many disks
would you use at most, in a RAID10 setup?

Kind regards,
// Mathias
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Best regards,
[COOLCOLD-RIPN]
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Roberto Spadim
Spadim Technology / SPAEmpresarial
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