On 12/18/2013 03:09 PM, Chris Murphy wrote:
On Dec 18, 2013, at 11:50 AM, Robert Moskowitz <r...@htt-consult.com
<mailto:r...@htt-consult.com>> wrote:
On 12/18/2013 01:32 PM, Chris Murphy wrote:
On Dec 18, 2013, at 6:03 AM, Robert Moskowitz <r...@htt-consult.com
<mailto:r...@htt-consult.com>> 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.
https://bugzilla.redhat.com/show_bug.cgi?id=1024002
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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