Welcome to the most active Linux Forum on the web.
Go Back > Forums > Linux Forums > Linux - Hardware > Linux - Embedded & Single-board computer
User Name
Linux - Embedded & Single-board computer This forum is for the discussion of Linux on both embedded devices and single-board computers (such as the Raspberry Pi, BeagleBoard and PandaBoard). Discussions involving Arduino, plug computers and other micro-controller like devices are also welcome.


  Search this Thread
Old 07-14-2014, 01:30 AM   #1
Registered: Jun 2008
Location: Phoenix, Arizona, USA
Distribution: Slackware
Posts: 326

Rep: Reputation: 49
General ARM/MiPS question: SATA Port Multipliers

I've read elsewhere that this question may be kind of stupid for embedded applications, BUT: do any ARM or MiPS SOCs that have SATA ports handle PMP port multipliers?

I've been seriously thinking about building a big near-line rack-mount NAS based around Tahoe-LAFS or similar where the main point is extreme energy efficiency and redundancy, where the drives AND controller(s) spend most of their time spun down--I freely admit I got the idea from Facebook's long term storage pods, which I don't have the link to at the moment.
Anyway, x86 is getting there, but ARM (and, to a lesser extent, MiPS) is king in this area, but I've read that not one of them support PMP. Is this true, and if so, is there hope this may be rectified in the future?

Related question: then what all those 4 or 8 port NASes use for controllers?
Old 07-15-2014, 03:30 AM   #2
Ser Olmy
Senior Member
Registered: Jan 2012
Distribution: Slackware
Posts: 2,485

Rep: Reputation: Disabled
SATA PMP is a feature of the SATA controller and its driver, not the CPU architecture.

If a SATA controller chip supports PMP and the Linux driver for that controller knows how to use that feature, then a system using that chip will support PMP.


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is Off
HTML code is Off

Similar Threads
Thread Thread Starter Forum Replies Last Post
B85 chipset & SATA port multipliers? CChiappa Linux - Hardware 0 05-17-2014 05:44 PM
[SOLVED] clock_gettime problem (moving from ARM to MIPS) Linux - Kernel 3 07-19-2011 07:37 AM
LXer: FemtoLinux allows to run applications in kernel mode on ARM, MIPS and PPC LXer Syndicated Linux News 1 07-09-2010 03:10 AM
general question on large sata hard drives jiml8 General 8 06-16-2010 04:53 PM
LXer: Android port to MIPs completed LXer Syndicated Linux News 0 06-03-2009 10:30 AM > Forums > Linux Forums > Linux - Hardware > Linux - Embedded & Single-board computer

All times are GMT -5. The time now is 08:48 PM.

Main Menu
Write for LQ is looking for people interested in writing Editorials, Articles, Reviews, and more. If you'd like to contribute content, let us know.
Main Menu
RSS1  Latest Threads
RSS1  LQ News
Twitter: @linuxquestions
Facebook: linuxquestions Google+: linuxquestions
Open Source Consulting | Domain Registration