<br><br><div class="gmail_quote">On Fri, Sep 24, 2010 at 7:50 PM, Digimer <span dir="ltr"><<a href="mailto:linux@alteeve.com">linux@alteeve.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">
<div><div></div><div class="h5">On 10-09-24 10:27 PM, Tom Bishop wrote:<br>
> I have been reading lots of stuff but trying to find out if a raid10<br>
> 2drive setup is any better/worse than a normal raid 1 setup....I have to<br>
> 1Tb drives for my data and a seperate system drive, I am only interested<br>
> in doing raid on my data...<br>
><br>
><br>
> So i setup my initial test like this....<br>
><br>
> mdadm -v --create /dev/md0 --chunk 1024 --level=raid10 --raid-devices=2<br>
> /dev/sdb1 /dev/sdc1<br>
><br>
><br>
> I have also read about near and far but was going to play with this and<br>
> was wondering if anyone had any insights for 2 drives setup...Thanks...<br>
<br>
</div></div>Raid 10 requires 4 drives. First you would make two RAID 0 arrays, then<br>
create a third array that is RAID 1 using the two RAID 0 arrays for it's<br>
devices.<br>
<br></blockquote><div><br></div><div>This would be a RAID 0+1, stripped set's mirror together. RAID 1+0 is mirrored disk sets stripped together.</div><div><br></div><div><a href="http://en.wikipedia.org/wiki/RAID#Nested_.28hybrid.29_RAID">http://en.wikipedia.org/wiki/RAID#Nested_.28hybrid.29_RAID</a></div>
<div><br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">
With only two drives, your option is RAID 1 (mirroring - proper<br>
redundancy) or RAID 0 (striping only - lose one drive and you lose *all*<br>
data).<br>
<br>
--<br>
<font color="#888888">Digimer<br>
E-Mail: <a href="mailto:linux@alteeve.com">linux@alteeve.com</a><br>
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</font></blockquote></div><br><br clear="all"><br>-- <br><div>Jacob Bresciani</div><div>Linux Systems Administrator</div><div>Advanced Ecommerce Research Systems / Terapeak</div><div>Cell: 250 418-5412</div><br>