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  • Suspend to disk/ram?

    I'm using a compaq deskpro pc, atx style (sort of), and will be using sproggys 2.6 psu

    So here's the $2 question: will suspend to disk or suspend to ram work, and what do i need?

    when i hit the pwrbutton now, at home, it will go to some kind of sleep mode, should i just leave the sproggy running and put it to sleep mode when i stop? lemme hear you thoughts
    -
    My cars
    -

  • #2
    Every psu has its lifetime... I would not keep a commercial dcdc running 24/7 like you suggest... let alone a home made dcdc.
    2001 PT Cruiser "BLK ICE"
    http://www.cobaltcarpc.com

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    • #3
      I am using suspend to ram in my car computer with a Keypower DC-DC PSU.
      Vickumar,
      there are no problems at all with leaving a well designed and built (commercial or home made) DC-DC PSU connected to the battery 24/7. That's what you do anyways when you turn off an ATX computer at home. The ATX specification PSUs supply power to the mobos even when they are off (unless you pull the power cord). The current draw is not much higher (if any at all) in STR state than at the off state.

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      • #4
        The current draw is not much higher (if any at all) in STR state than at the off state.
        I also heard that leaving a pc alive for a week draws less pwr than one that you start every morning and shuts down every night..
        -
        My cars
        -

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        • #5
          Originally posted by vickumar
          Every psu has its lifetime... I would not keep a commercial dcdc running 24/7 like you suggest... let alone a home made dcdc.
          (sarcasm)Because nobody keeps regular supplies running all the time.(/sarcasm)

          Suspend to disk/RAM should work fine with ANY ATX supply that supports the ATX specification.
          Player: Pentium 166MMX, Amptron 598LMR MB w/onboard Sound, Video, LAN, 10.2 Gig Fujitsu Laptop HD, Arise 865 DC-DC Converter, Lexan Case, Custom Software w/Voice Interface, MS Access Based Playlists
          Car: 1986 Mazda RX-7 Turbo (highly modded), 1978 RX-7 Beater (Dead, parting out), 2001 Honda Insight
          "If one more body-kitted, cut-spring-lowered, farty-exhausted Civic revs on me at an intersection, I swear I'm going to get out of my car and cram their ridiculous double-decker aluminium wing firmly up their rump."

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          • #6
            Originally posted by Dimitris1976
            The current draw is not much higher (if any at all) in STR state than at the off state.
            I haven't tried it with the Keypower yet, but with other atx ps's, STR doesn't shut the fan off. Wouldn't that draw a significant amount of juice? What are the chances of running down a cheap Fleet Farm batt in 20F weather? Are there devices that you can plug the fan into that will turn it on if a sensor goes above a certan temp?

            I looked at STD (suspend to disk ) with XP, but that seems to take longer to come out of than a clean win98 boot (shell=winamp).
            http://www.jeepmp3.com/
            CarPC Stolen. Starting over.
            Ne1 recognize the avatar?

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            • #7
              I also have Sproggy MK2.5 power supply, and when the computer is shut down the fan remains running, would this drain my battery rather quickly? It is a 92MM 12V fan in it. Additionally, how do you all put the computer in suspend mode? Do you do it manually or do you have it set to enable suspend after a certain period of time? I really hate using hibernate in that as of right now, I need to put my car into hibernate, wait almost 10 seconds for it to write to disk, and then shut off my car, which then cuts the power to the computer.

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              • #8
                All the ATX PSUs don't support STR. They have to be compliant with ATX 2.01 or higher specification and be able to supply a minimum of 720mA at standby. Earlier ATX power supplies or home made power supplies that don't comply with these standards will not turn off their fans and/or will cause other problems or instability issues to the systems.
                Keypower's DC PSU is ATX 2.01 compliant and turns it's fan off. The desktop I use at home and bought last year supports STR too. Another desktop I have at the office (bought two years ago) with a generic PSU does not turn off it's fan or the CPU fan at stand by. The computer just spins down the HDDs and enters a low power consumption state.
                When a computer enters STR it is practically off (turns off all fans, peripherals, video card, HDDs and CPU). The only thing that is kept alive is the RAM, with minimum power drain, in order to keep it's data. STD (=Suspend To Disk) writes everything that's on RAM on the HDD and then turns off. So all the data on the RAM is lost and has to be read from the disk during boot (=more time consuming).
                Keep in mind that even though the ATX 2.01 spec says that the PSU should be able to supply 720mA, that DOESN'T mean that your computer will draw this amount of current while in STR state. Mine draws approximately 180mA at STR. This is low enough to make sure that it won't drain your car's battery for some days.
                If I turn it compleately off it draws 110mA, so the difference is minimal for having a 6 SEC BOOT TIME and all the software (players etc) running the way I left it.
                If you want to be totaly safe you could add a circuit that disconnects the PSU from the battery when the voltage drops below a certain level (the kind circuit good inverters have), to prevent you battery going flat in case you leave your car parked for many days with the PC at STR. STR has the advantage that if you disconnect power this way, the computer will not "see" it as a hard reboot and will boot next time normally without scanning drives for errors and will not cause any problems to the Windows OS in the future.

                An easy way to use STR with Sproggy's PSU, would be to disconnect the PSU's fan from the PSU board, and supply it through a HDD power connector that should turn off in STR.
                JUST MAKE SURE THAT SPROGGY'S PSU DOES NOT GET TOO HOT IN STR WITH IT'S FAN OFF!

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                • #9
                  Dimitris1976-
                  Dude. You rock! Thanks for the info.
                  I'll test out STR and see if the Keypower can hold <720mA during engine start. It would be nice to break the nearly 1 minute boot barrier I have right now!
                  http://www.jeepmp3.com/
                  CarPC Stolen. Starting over.
                  Ne1 recognize the avatar?

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                  • #10
                    PatO

                    Keypower does hold your computer in STR during engine cranking. Sometimes (depends on your computer, engine size, battery size/age, cabling) it can keep the computer running (not reboot) during engine starts too.
                    Use a tank circuit (a capacitor and a diode) and it will never reboot!
                    Read this for more info:

                    http://www.mp3car.com/vbulletin/show...&threadid=6363

                    Keep in mind that in order to use STR your motherboard has to support it too (Supermicro 370SED with Intel's 810 chipset that use does, so I guess all the newest do), you have to enable ACPI in BIOS and finally setup Win98 again with the command line:

                    DriveLetter:\setup /p j

                    You can do that over a previous Win98 installation. In WinXP you don't have to do that last step.

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                    • #11
                      anybody know if the fv24 will do STR?
                      "if everything is under control, you're not going fast enough!"

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                      • #12
                        I was reading the specs for the FV24 here:

                        http://www.spacewalker.com/english/m...asp?number=122

                        and it says that it is ACPI Compliant. So I guess that means that it does support suspend to RAM.
                        1983 BMW 733i
                        Cyrix 166 32MB with MPXPLAY And no display. Player sits on the back seat with a keypad in front. Someday I'll mount this thing for good...
                        *****************************
                        Gathering parts for carplayer v2.0!

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                        • #13
                          If you scroll here:

                          http://www.spacewalker.com/english/m...asp?number=122

                          all the way down you will read: "Support Suspend to Ram"

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                          • #14
                            Okay, haven't had much luck getting the keypower fan to shut off in STR (Win98). I did not install windows with the /p j switch, however I did redetect hardware with registry modifications per this document (no conflicts found, all drivers were replaced with ACPI ones):
                            http://www.windows-help.net/windows98/tune-37.shtml

                            My motherboard is an ABIT BH6, which does support ACPI, but can't find info on which version. Does anyone know if it needs to specifically support ACPI 2.1?

                            I also can't get it to hibernate, which may also tell us something about it's ACPI capabilities, though I've heard that 486's should be able to hibernate... I set it to hibernate when I press the power button. When I press the button, it pops up a message that says "going to hibernate" or something like that (it's only up for a split second) and blanks out the screen. A split second later, it comes back like nothing happened.

                            I don't much care about hibernation. What I want is for that fan to shut off during STR. I'm thinking that the mobo needs to send something to the PS to tell it to go into STR mode... Any thoughts?

                            Dimitris - I know it may still cut out when starting the car. However, I assume it requires *much* less power to keep the pc alive in STR than at full throttle. So mabye it'll work, mabye not, I'll deal with that when the time comes.
                            http://www.jeepmp3.com/
                            CarPC Stolen. Starting over.
                            Ne1 recognize the avatar?

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                            • #15
                              PatO I am very interested in the results of your findings here. In my personal experience, when I had issues with my machine going into hibernate, and then coming right back to Windows as if nothing happened, the solution was to run scandisk, at which point it would find some errors and fix them. AFter that, hibernation would work properly. I have a sproggy supply which doesn't shut its fan off when I go into suspend mode, and i'm wondering how long the battery will last.

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