Pogoplug or Goflex Home?

This forum is for Marvell Kirkwood devices such as the GoFlex Home/Net, PogoPlug v1/v2, SheevaPlug, and ZyXEL devices.

Pogoplug or Goflex Home?

Postby oconn1st » Wed Nov 14, 2012 2:12 pm

Hey,

I am buying a new device and would like some suggestions. I am torn between getting a pogoplug v4 (or maybe v2) or a goflex home. I want something to do media streaming to my pc's and google tv. I am leaning towards the goflex because it comes with a 2TB HDD and I am running out of space on my existing drives; however if I went with the pogoplug I could utilize those existing drives and get a new one.

HELP!
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Re: Pogoplug or Goflex Home?

Postby xenoxaos » Wed Nov 14, 2012 6:59 pm

Well, the goflex home also has a usb port for expansion...the v2 has a bit more memory, but only usb and no sata...the v4 is 400 mhz slower...i would tend to lean towards the goflex....then to the v2...
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Re: Pogoplug or Goflex Home?

Postby winestock » Fri Nov 16, 2012 1:29 am

I am using a Pogoplug Series 4 as a media streamer. I have a 2 bay raid box, JBOD mode, installed with (2) 4TB hard drives hooked to the PPv4. I am using it as a server for DVD movies to my Mac computers using AFP for XBMC. The PPv4 is working very well. I picked up one at Best Buy for $60. I am planning one picking up another to use as a web server. I think the USB 3.0 port on the PPv4 is a definate plus.
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Re: Pogoplug or Goflex Home?

Postby moonman » Fri Nov 16, 2012 4:44 am

$this->bbcode_second_pass_quote('winestock', 'I') am using a Pogoplug Series 4 as a media streamer. I have a 2 bay raid box, JBOD mode, installed with (2) 4TB hard drives hooked to the PPv4. I am using it as a server for DVD movies to my Mac computers using AFP for XBMC. The PPv4 is working very well. I picked up one at Best Buy for $60. I am planning one picking up another to use as a web server. I think the USB 3.0 port on the PPv4 is a definate plus.


There isn't much gain from using USB 3.0 because slow(er) CPU will still be the bottleneck. Even with GoFlex sata hdds samba transfer speed reach 35MB/s if you are lucky and there isn't much running on the device (compared to ~30MB/s PPv2). Some people tested PPv4 samba transfers and throughput was lower, even with USB 3.0 hdds.
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Re: Pogoplug or Goflex Home?

Postby WarheadsSE » Fri Nov 16, 2012 6:51 am

I will have to test writing to the usb3.0, with samba and the newer kernel with bfq.
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Re: Pogoplug or Goflex Home?

Postby winestock » Fri Nov 16, 2012 3:40 pm

$this->bbcode_second_pass_quote('moonman', '')$this->bbcode_second_pass_quote('winestock', 'I') am using a Pogoplug Series 4 as a media streamer. I have a 2 bay raid box, JBOD mode, installed with (2) 4TB hard drives hooked to the PPv4. I am using it as a server for DVD movies to my Mac computers using AFP for XBMC. The PPv4 is working very well. I picked up one at Best Buy for $60. I am planning one picking up another to use as a web server. I think the USB 3.0 port on the PPv4 is a definate plus.


There isn't much gain from using USB 3.0 because slow(er) CPU will still be the bottleneck. Even with GoFlex sata hdds samba transfer speed reach 35MB/s if you are lucky and there isn't much running on the device (compared to ~30MB/s PPv2). Some people tested PPv4 samba transfers and throughput was lower, even with USB 3.0 hdds.


Granted the specs for the PPv4 are not as good as other Pogoplugs or GoFlex. I just ran a test where I was streaming two different DVDs to two different Mac computers at the same time. Both DVDs played without a hitch, not a single stutter or pause due to the lack of horse power on the PPv4. Of course this isn't HD streaming but the PPv4 certainly handled media streaming very well. I have the PPv4 setup only for media streaming using netatalk (AFP) access.
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Re: Pogoplug or Goflex Home?

Postby WarheadsSE » Fri Nov 16, 2012 4:52 pm

PPV4 with linux-kirkwood, to a USB3 WD 3TB MyBook (probably not high speed disk), I get a sustained ~ 22MB/s write over samba, which we know is a bit of a CPU hog.
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Re: Pogoplug or Goflex Home?

Postby winestock » Tue Nov 20, 2012 12:01 am

$this->bbcode_second_pass_quote('WarheadsSE', 'P')PV4 with linux-kirkwood, to a USB3 WD 3TB MyBook (probably not high speed disk), I get a sustained ~ 22MB/s write over samba, which we know is a bit of a CPU hog.


I just ran a write/read speed test on my PPv4. Using a Hitachi Coolspin 4TB 7200rpm hard drive installed in a Datatale RS-M2QJ 2-Bay raid box configured for JBOD:
$this->bbcode_list('2')
  • Plugged into USB 2.0 top port, achieved ~28.2MB/s read and ~30.1MB/s write over samba, HD drive formatted HFS+.
  • Plugged into USB 3.0 back port, achieved ~37.2MB/s read and ~40.4MB/s write over samba, HD formatted HFs+.

  • I was using the 'hdparm -t' to measure the read speed and the 'dd' command to measure the write speed. Curious though, I would have thought the read speed would have been better then the write speed.
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    Re: Pogoplug or Goflex Home?

    Postby moonman » Tue Nov 20, 2012 1:02 am

    So were you using samba or hdparm -t/dd because hdparm -t can't be used over samba and ofcourse direct on-device speeds will be much better because there's no CPU overhead imposed by samba. With my GoFlex Home I get about 107MB/s read from a sata drive (it's probably not true because it does drive cache to interface rather than drive to interface) which is irrelevant since I almost never use the drive directly, only through samba. Also hdparm is filesystem independent, so there won't be any f/s overhead.

    Don't get me wrong here, that would be great if PPv4 would be this quick, but I just can't see a slower device outperform a faster one where interface or drive speed are not the limiting factor.
    Last edited by moonman on Tue Nov 20, 2012 1:51 am, edited 1 time in total.
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    Re: Pogoplug or Goflex Home?

    Postby winestock » Tue Nov 20, 2012 1:47 am

    $this->bbcode_second_pass_quote('moonman', 'S')o were you using samba or hdparm -t/dd because hdparm -t can't be used over samba and ofcourse direct on-device speeds will be much better because there's no CPU overhead imposed by samba. With my GoFlex Home I get about 107MB/s read from a sata drive (it's probably not true because it does drive cache to interface rather than drive to interface) which is irrelevant since I almost never use the drive directly, only through samba. Also hdparm is filesystem independent, so there won't be any f/s overhead.


    I just realized that was doing the read/write test directly on the PPv4. I also realized that the write speed test will also be impacted by the network speed. In my case, over samba I was able to achieve a write speed~2.5MB/s and a read speed ~3.59MB/s over samba, pretty horrible. Of course the overhead of hfs+ disk format has a lot to do with the slow transfer speed as you have already pointed out.
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