Advanced Format drives + RAID5 + LVM + EXT4 = migraine

[Jake Peavy]

On Sun, Aug 29, 2010 at 3:06 PM, Robert Arkiletian <robark at gmail.com> wrote:

> On Sun, Aug 29, 2010 at 10:08 AM, Jake Peavy <djstunks at gmail.com> wrote:
> ...
> >
> >
> > I have a feeling my array should perform much better than this and it's
> > probably because I haven't taken the 4k sector size into account and I'm
> > bleeding performance.
> >
> > Can anyone comment?  If I need to take the 4k sector size into account,
> > where should I do so?  With partitions?  In pvcreate?  Some other place?
> Or
> > multiple places?
> >
>
> http://www.ibm.com/developerworks/linux/library/l-4kb-sector-disks/
>

Yeah, I had read that prior to posting, but let me know if I followed it
correctly.  It sounds to me (from the sidebar) that I don't need to do
anything because I'm using software RAID and it already operates with 4kB
multiples.  Yes?

If so, and I have everything configured correctly, the question then
becomes: How does one know if one is getting the most out of their
hardware?  I was expecting more like 70-100MB/s writes, and 100-200MB/s
reads.

TIA

-- 
-jp

To become a knife thrower in the circus, they probably don't let you start
off throwing at a live woman. They start you out with a little girl.

deepthoughtsbyjackhandey.com
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