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Thread: Reducing Return From Hibernation Time......

  1. #41
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    Good stuff - thanks!
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  2. #42
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    ATA100 (HDD) = 100 Megabytes / second
    USB 1.1 = 12 Mega BITS / second = 1.25 Megabytes/second
    USB 2.0 = 480 Mega BITS / second = 40 Megabytes/second

    Those are theoretical maximum speeds too. So you will get slightly less.

    HDD is always faster than USB in raw transfer speed. The gain for USB comes from the tiny seek times compared to spindle HDDs, because flash disks have no spin up - it is solid state. If using a normal HDD over a USB connection you must wait for the HDD to seek/spin up AND you get only a maximum of 40MBytes/second throughput.

  3. #43
    Maximum Bitrate carabuser's Avatar
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    Pardon me if this has been addressed already, as I have only read through half of the posts.

    I'd like to mention the hibernation issue with larger RAM. I used to be a believer that adding more RAM will significantly increase boot times (coming back from hibernation, that is). However, I get some conflicting results on the systems that I run.

    On my home PC (Athlon XP 2600+), Resuming from hibernation took significantly longer after I upgraded from 512Mb of RAM to 1024. HOWEVER, when I upgraded my Laptop PC (Pentium M, 2Ghz, 40Gb HDD 5400 RPM) from 512Mb to 1.25Gb, I noticed practically NO difference in Resume From Hibernation times.

    With that in mind, I'd like to point out that it is not necessary that your boot up time will improve dramatically if you remove RAM. However, you will only find out when you try.

    Btw, my 1.5Ghz Celeron Laptop resumes from hibernation in about 15-20 seconds. 256Mb ram tho
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    s3 works great for me, no battery issues and back up and running under 10 seconds. The fans DO NOT spin, only the RAM stays energized. Consumes less than 5W (>0.4A).

    I use an opus 120W and it doesnt shut off the computer after x amount of time.
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  5. #45
    Newbie OptimusPrime's Avatar
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    Question

    Quote Originally Posted by Iceman_jkh View Post
    ATA100 (HDD) = 100 Megabytes / second
    USB 1.1 = 12 Mega BITS / second = 1.25 Megabytes/second
    USB 2.0 = 480 Mega BITS / second = 40 Megabytes/second

    Those are theoretical maximum speeds too. So you will get slightly less.

    HDD is always faster than USB in raw transfer speed. The gain for USB comes from the tiny seek times compared to spindle HDDs, because flash disks have no spin up - it is solid state. If using a normal HDD over a USB connection you must wait for the HDD to seek/spin up AND you get only a maximum of 40MBytes/second throughput.
    Apologies, i stand corrected

    Although i dont wish to dismiss it too quickly?

    Notice this statement:
    I found that my Seagate 300G SATA drive spins-up in about 7-7.5 seconds
    Its too early for me to think about it too much, but what would 7 seconds (spin up time) + time taken to get the data at 100MB/s (say on 512mb ram/file), compared with 0 seconds spin up time (solid state) + time taken to get the data at 40 MB/s?

    Daz

  6. #46
    Maximum Bitrate NiSlo's Avatar
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    Quote Originally Posted by OptimusPrime View Post
    If you add the /maxmen=xxx into the boot.ini file, doesnt that stop windows from using the extra memory altogether? If so you may aswell remove the actual module... . (Unless you only have 1 stick of 512mb and want to reduce to 256mb)
    What if your system uses between 256 and 512mb of RAM under load? Say for example that once you have everything installed and running under full load, you check task manager and it tells you that you're using 350mb of your 512mb RAM. You could then set the himem to 375/400 mb and have the RAM you need under full load, but no excess address that need to be stroed during hibernation therefore saving hibernation time...

    This could work no?
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  7. #47
    Newbie OptimusPrime's Avatar
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    Quote Originally Posted by OptimusPrime View Post
    Its too early for me to think about it too much, but what would 7 seconds (spin up time) + time taken to get the data at 100MB/s (say on 512mb ram/file), compared with 0 seconds spin up time (solid state) + time taken to get the data at 40 MB/s?
    Times are of course estimated.
    512mb RAM
    HDD

    7 Secs spin up time + (512mb / 100mb/s = 5.12s) = 12.12 seconds.
    USB Flash Drive
    0 Secs spin up time + (512mb / 40mb/s = 12.8s) = 12.8 seconds.

    So no saving there...but...

    256mb RAM
    HDD

    7 Secs spin up time = (256 / 100mb/s = 2.56s) = 9.56 seconds
    USB Flash Drive
    0 Secs spin up time + (256mb / 40mb/s = 6.4s) = 6.4 seconds

    Obviously it would need to be tested, but there is a potential saving of over 3 seconds with 256mb and just under 6 seconds if you use the "maxmem=" statement to reduce your ram from 512 and use a USB device...?

    Daz

  8. #48
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    The HDD usually spins up as soon as you press the power button. This means that the drive spins up while the BIOS/POST is occurring. Normally the Bios/POST takes < 7 seconds, so it spends the rest of the time waiting for the HDD to be ready.

    Therefore the calculation would actually be:
    BIOS/POST Time + 'Additional Time needed for HDD to be ready' + Windows Loading Time.

    Eg: Bios Time = 5 seconds
    HDD Spin up = 7 seconds
    Loading Windows 4 seconds

    Total Time = 5 + 2 [=7-5] + 4 = 11 seconds

  9. #49
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    I've just finished reading this whole thread and it's great.

    Now let me throw this little bit of info out to all of you which really begs the question of whether RAM/HD matters so much, and whether software can't make a difference:

    I have a dual-boot PC: Vista on one partition, XP on the other. Both on the same physical harddrive though. This is on a laptop, FYI.

    Resume from hibernate running XP = 50-55 seconds

    Resume from hibernate running Vista = 10 - 15 seconds

    This test was run with NO APPLICATIONS RUNNING on either OS... just the desktop view.

    This is on the SAME PC folks. All my hardware, including USB periphs, is identical regardless of which OS I'm running. Same RAM, same HDD, same everything.

    Obviously Vista is doing something different behind the scenes to create such a significant reduction in hibernation resume time.

    Until I can figure out what that is, I can't possibly believe that RAM size and HDD speed have nearly as much bearing on the resume speed as many here seem to think.

    Any thoughts?

  10. #50
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    Very interesting - I had contemplated using Vista because I noticed it resumes from hibernation a bit faster. What specs are your laptop?
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