On 12/18/2013 03:09 PM, Chris Murphy
wrote:
On 12/18/2013 01:32 PM, Chris
Murphy wrote:
On 12/18/2013 04:41 AM,
John Obaterspok wrote:
Hello,
I'm going to setup F20 with a new SSD disk
(256gb Samsung 840 PRO) and was wondering
about best practices for Over Provisioning
during partitioning.
hmmm. I just ordered a Crucial M500 256GB SSD for
my new install. I thought I would have it all to
work with (currently using a 320GB HD, so that is a
64GB reduction already). Are you implying here that
you need to not use all of the SSD drive so that it
has some swap around?
I chose the M500 over the 840 based on price and
reviews. The M500 uses MLC NAND compared to the 840
using TLC NAND.
FYI, be aware there appears to be a queued TRIM bug
with the M500 where it may be causing silent data
corruption. I wouldn't use discard on this, or any, SSD,
in production until it's been well tested.
Seems like a workaround was posted yesterday? So since I am
still waiting for the drive to show up on my porch…
Yes. Although I'm uncertain whether we get queued TRIM "for
free" with a SATA rev 3.0 controller, or if that means such
drives use the SATA rev 3.0 non-queued TRIM? I'm under the
impression that to get SATA rev 3.1 queued TRIM that the drive
and the controller it plugs into, and libata all need to
support SATA rev 3.1. So I don't actually fully understand the
problem, but it sounds like a firmware bug to me. Suffice to
say, with Windows having enabled TRIM by default for all SSDs,
if a drive is corrupting its data, this ought to be quickly
remedied with a firmware update I'd think.
My Lenovo x120e supposedly has the sata3 chipset, but only sata2
enabled. According to a few forums that I found when looking for
what type of drive to buy for this laptop. Some think the sata2
option is to upsell the x220.
So perhaps TRIM is even less important to me.
But first I have to get f20 working reasonably on my Asus before
installing on my Lenovo. And I have to figure out a few things.
Not being able to specify the update repo at install was painful.
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