[Cialug] Big Disks

[Matthew Nuzum]

On Sun, Jan 10, 2010 at 12:50 PM, Nick Fox <nfox at foxmediasystems.com> wrote:

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> I would tend to disagree here. I have been running the same 1TB HDD in
> my MythTV master system for more than 2 years and the system has no heat
> issues or problems with the disk.
>
>
In theory,

 1. Disks w/ larger caches will need to spin and move heads less so heat and
wear should decrease
 2. Disks that have less space used by data should have to move the
read/write heads less which should
    a. cause less wear on the drive
    b. use less energy, produce less heat
    c. increase read and write speed because less seeking is being done (as
in the total distance the head has to move to fulfill it's requests)

On the postgreSQL performance mailing list a few years ago some people did
some testing. They found they could get improved performance by striping
disks but using only the outer portion of the disk where the data density is
the highest, and then mirroring the striped sets (so Raid 10) - that might
be backwards. They also set the block sized very high to like 1MB on the
raid set.

So there's a reason to get the larger capacity disk. Just create a partition
using the first 600G and don't use it, instead use the partition on the
outer 400G.

-- 
Matthew Nuzum
newz2000 on freenode, skype, linkedin, identi.ca and twitter
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