Re: PCIe SATA controllers
For JBOD disks the LSI or the build-in Intel or AMD ports seem to be
equally as fast since they are all connected to the CPU with enough
PCI-e lanes, and for most usage cases it is plenty fast enough.
I have had bad luck with at least 2 different marvell chipsets, so
won't touch those. One of them would timeout all 4 disks connected
to it and the issue seemed to be worse if smart commands were being
done (I removed a job that was doing smart commands often, and
stability went from weeks to months). It was a 9230 and it acted
like it was using a SAS expanders, and some notes I have found
indicated a number of the Marvell ones rely on a SAS expander. It was
4portsx6gbit with pcie-x2 and was fast when it worked but unreliable.
So I am staying one of the enterprise class SAS cards, or the
build-in's from AMD or Intel is all I will use.
On Thu, Aug 9, 2018 at 2:08 PM, Alex <mysqlstudent(a)gmail.com> wrote:
> Hi,
>
>> The curiosity is killing me! What do you need
>> 6+ SATA ports for?
>
> I have a 60GB SSD that I use for root, along with a 240GB I use for a
> Windows VM. The others are 4TB disks I use for my photography and
> Videos/torrents. The sixth is the BR-DVD
>
> I needed two more 4TB to mirror together for data to bring to the colo
> instead of having to transfer it to our production systems over the
> Internet.
>
> It also became an exercise to learn whether the onboard Intel is as
> fast as one of the LSI/RAID/SAS controllers, and perhaps it would be
> faster to use one of those instead of the onboard Intel.
>
>> It has an M.2 NVMe slot (which uses four lanes of PCIe)
>
> Aren't those "disks" very expensive? And limited capacity? I also
> don't currently have any, so would have to buy them to replace what I
> have.
>
> Thanks,
> Alex
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