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Re: [nslu2-linux] Re: Marvell SheevaPlug Port --- Has anybody seen this?

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  • CN
    --Original Message Text--- From: David Given Date: Sat, 06 Jun 2009 21:28:55 +0100 ... Debian installation, but I assume so. You may not need to, however.
    Message 1 of 15 , Jun 6, 2009
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      --Original Message Text---
      From: David Given
      Date: Sat, 06 Jun 2009 21:28:55 +0100
      > I don't know whether it's possible to install optware packages on a full
      Debian installation, but I assume so. You may not need to, however.

      David, For slugosbe, the aptware apache version had limitations for my site, and the original builder of that limited apache could/did not want to continue. That is why I had to go with the optware pkgs. There were a number of other odds and ends pkgs which simply were not in the apt stream, at least ~3 years ago.

      >AFAIK, unless they've changed something, all SlugOSes boot from flash
      (so the the kernel and root filesystem are on the flash device). They
      may then optionally switch to using an alternative root filesystem on an
      external disk if that's what you want, which I think is what your setup is.

      What is the parent distribution of slugosbe, is that Debian?

      >You *may* want to hold off a bit --- there's a device from Marvell
      called the OpenRD coming up. It's the same processor as the SheevaPlug
      but in a bigger box and has more ports --- VGA, seven USB ports (the
      SheevaPlug only has one!), etc. Hopefully two Ethernet. Projected price
      is $200 as opposed to the SheevaPlug's $100. OTOH, my SheevaPlug is
      doing pretty well...

      Well for me, smaller the better :) I am into micro pwr versions... What about the second usb mini on the dev system of SheevaPlug? Is that not available as a general purpose usb? They would have the non development system, with only one usb port, which is even smaller (the same size as the old wall warts), and this my final target -- expected $40, and this is my interest for the SheevaPlug.

      Cordially,
      CN

    • David Given
      ... Hash: SHA1 CN wrote: [...] ... No, SlugOS is based on OpenEmbedded (a mechanism for building embedded Linux distributions). Debian is entirely different.
      Message 2 of 15 , Jun 6, 2009
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        CN wrote:
        [...]
        > What is the parent distribution of slugosbe, is that Debian?

        No, SlugOS is based on OpenEmbedded (a mechanism for building embedded
        Linux distributions). Debian is entirely different. Although, just to
        confuse matters, it is possible to run Debian *on top of* SlugOS --- I
        did for years.

        [...]
        > Well for me, smaller the better :) I am into micro pwr versions... What
        > about the second usb mini on the dev system of SheevaPlug? Is that not
        > available as a general purpose usb? They would have the non development
        > system, with only one usb port, which is even smaller (the same size as
        > the old wall warts), and this my final target -- expected $40, and this
        > is my interest for the SheevaPlug.

        The mini USB socket is a *slave* socket, and is intended for plugging
        the SheevaPlug into a PC so you can get at the serial console. (And is
        also used for JTAG debugging.) The only thing you can use for connect
        hard drives and peripherals is the single USB master socket. There is an
        SD card slot, though.

        (Although it'd be entirely possible to use a NAS hard drive via the
        Ethernet port; it's gigabit ethernet, so bandwidth isn't a problem. Now,
        if only you had some NAS box which you could connect a USB hard drive to...)

        BTW, today I finally turned off my server PC in favour of the
        SheevaPlug. My entire system, web site, email, IMAP, spam detection, the
        lot, is now running off it. The energy consumption went from 90W to 35W.

        - --
        ┌─── dg@cowlark.com ───── http://www.cowlark.com ─────

        │ "People who think they know everything really annoy those of us who
        │ know we don't." --- Bjarne Stroustrup
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      • CN
        ... 35W! Wow, that is an hog energy compared to a slug at 6W with a network drive ... When you added the modules, which stream did you use? aptware? Is
        Message 3 of 15 , Jun 6, 2009
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          On Sun, 07 Jun 2009 01:20:53 +0100, David Given wrote:

          > BTW, today I finally turned off my server PC in favour of the
          > SheevaPlug. My entire system, web site, email, IMAP, spam detection, the
          > lot, is now running off it. The energy consumption went from 90W to 35W.

          35W! Wow, that is an hog energy compared to a slug at 6W with a network drive
          :) No wonder, the reports, the plug has been running rather hot.


          When you added the modules, which stream did you use? aptware? Is there an
          easy way for me to look at that stream listing from my slugosbe, to see which
          modules are available and what versions. Thanks.

          Cordially,
          CN
        • David Given
          ... Hash: SHA1 CN wrote: [...] ... Actually, that s the consumption for the entire stack --- the SheevaPlug itself is using 5W or so. That includes two USB
          Message 4 of 15 , Jun 7, 2009
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            CN wrote:
            [...]
            > 35W! Wow, that is an hog energy compared to a slug at 6W with a network drive
            > :) No wonder, the reports, the plug has been running rather hot.

            Actually, that's the consumption for the entire stack --- the SheevaPlug
            itself is using 5W or so. That includes two USB hard drives, a powered
            USB hub, an ADSL modem and a WRT54GL. The SheevaPlug itself uses about
            half the power of an NSLU2 (although this will go up if you add lots of
            USB devices).

            > When you added the modules, which stream did you use? aptware? Is there an
            > easy way for me to look at that stream listing from my slugosbe, to see which
            > modules are available and what versions. Thanks.

            I'm not using Optware. This is a pure Debian installation.

            - --
            ┌─── dg@cowlark.com ───── http://www.cowlark.com ─────

            │ "People who think they know everything really annoy those of us who
            │ know we don't." --- Bjarne Stroustrup
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          • CN
            ... David, That is good to know. But the 5w (that you say) as the pwr of SheevaPlug is definitely not half that of the Slug. Long time ago I had precisely
            Message 5 of 15 , Jun 7, 2009
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              On Sun, 07 Jun 2009 10:05:14 +0100, David Given wrote:

              > Actually, that's the consumption for the entire stack --- the SheevaPlug
              > itself is using 5W or so. That includes two USB hard drives, a powered
              > USB hub, an ADSL modem and a WRT54GL. The SheevaPlug itself uses about
              > half the power of an NSLU2 (although this will go up if you add lots of
              > USB devices).

              David, That is good to know. But the 5w (that you say) as the pwr of
              SheevaPlug is definitely not half that of the Slug. Long time ago I had precisely
              measured the power usage and listed here. Even though the pwr supply is rated
              at 5v, 2amp that is (almost) enough to supply two attached notebook drives. If I
              remember correctly, the slug itself takes only about 2 or 3 watts.
            • David Given
              ... Hash: SHA1 CN wrote: [...] ... I got my numbers from here: http://www.nslu2-linux.org/wiki/HowTo/OverClockTheSlug ...although cross referencing elsewhere
              Message 6 of 15 , Jun 7, 2009
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                CN wrote:
                [...]
                > David, That is good to know. But the 5w (that you say) as the pwr of
                > SheevaPlug is definitely not half that of the Slug. Long time ago I had precisely
                > measured the power usage and listed here. Even though the pwr supply is rated
                > at 5v, 2amp that is (almost) enough to supply two attached notebook drives. If I
                > remember correctly, the slug itself takes only about 2 or 3 watts.

                I got my numbers from here:

                http://www.nslu2-linux.org/wiki/HowTo/OverClockTheSlug

                ...although cross referencing elsewhere shows that they're probably
                wrong. Go wiki!

                Oh, yes, one other thing where the SheevaPlug wins is that it has proper
                USB power circuitry: you can plug high-load devices into it and they'll
                actually run, without any of the weird brownouts the NSLU2 is prone to.
                One day I'd like to meet whichever designer at Linksys thought that
                would be a good idea...

                (In fact, you can take the lid off the SheevaPlug and you end up with a
                mini 5V switch mode supply in one hand and the computer in the other.
                It's *ideal* for running off batteries.)

                - --
                ┌─── dg@cowlark.com ───── http://www.cowlark.com ─────

                │ "People who think they know everything really annoy those of us who
                │ know we don't." --- Bjarne Stroustrup
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