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  1. #16
    macOS High Sierra APFS only support SSDs
    chscag's Avatar
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    That's an interesting point that Bob Ferrarr has come up with. Flash storage vs an SSD. What's the difference?

    Nothing like more confusion, however, Slydude and his Time Travel Hat should be able to fill us in...

  2. #17
    macOS High Sierra APFS only support SSDs
    Raz0rEdge's Avatar
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    A SSD has at it's core the flash component, the other part of it is the connector either PCIe (MBPs) or SATA (replacement to traditional HDD).
    --
    Regards
    ...Ashwin


  3. #18
    macOS High Sierra APFS only support SSDs
    pm-r's Avatar
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    Flash storage vs an SSD. What's the difference?

    AFAIK and as Ashwin stated about the connectors, and from what I've read, the SSDs normally use better quality and faster chips than the smaller "flash" or "thumb" drives as they are referred to.

    No doubt, there may also be a small difference in some of the circuitry each uses.


    EDIT:
    Well sure lots of info out there like:

    https://www.google.ca/search?client=...Isve8AfTqIXwCQ

    And then some hits like:
    SSD vs. HDD: What's the Difference?
    https://www.pcmag.com/article2/0,2817,2404258,00.asp
    and
    The Difference Between SSD and Flash Hard Drives
    https://danielmiessler.com/blog/the-...es/#gs.5zv17Ig






    - Patrick
    ======
    Last edited by pm-r; 08-31-2017 at 11:28 PM. Reason: added edit info

  4. #19
    macOS High Sierra APFS only support SSDs
    IWT's Avatar
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    If I may quote directly from the second of Patrick's excellent links: (Source acknowledged as https://danielmiessler.com/blog/the-...es/#gs.5zv17Ig)

    1. Modern SSD hard drives are Flash-based, so today there’s not really a difference today between SSD and Flash. SSD is simply a disk that doesn’t have moving parts, and Flash is the implementation that allows that to happen.

    2. USB thumb drives have used Flash storage for a long time as well, but the quality of the Flash storage in those is typically much lower than the Flash memory used in SSDs. This means much worse performance, etc.

    3. In short, you shouldn’t compare Flash to SSD just as you shouldn’t compare batteries to lithium-ion. In both cases the latter is a type of the former.


    Ian
    Ian

  5. #20
    macOS High Sierra APFS only support SSDs
    Raz0rEdge's Avatar
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    Getting a little off-topic here..but yes, flash parts come in different variety best suited to the size (both physical and storage) they need to conform to..the smallest of microSDs use a particular type of flash part that has a very short lifespan, but is darn cheap. The SSDs on the other end of the spectrum use the type that has quite a long life but also is more expensive, but since the entire SSD is being sold for more than a microSD, the cost makes sense..
    --
    Regards
    ...Ashwin


  6. #21
    macOS High Sierra APFS only support SSDs
    RadDave's Avatar
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    Guys - question about the new APFS - when 'High Sierra' is released, I plan to upgrade my Mac laptops w/ SSDs which will automatically convert their file systems to Apple's new one from my reading of this thread & the links. My wife's iMac has a fusion drive (and will await Apple's decision as to how they may handle these spinning drives - and I'm planning soon to replace that computer w/ a new one which will have a SSD) which I may not upgrade to 'High Sierra' unless that option exists and is considered a safe transition?

    But my question is whether apps, such as updated Pages, Numbers, & Keynote writing to the new APFS can exchange their files w/ the older HFS+ if still on our iMac; of course, the issue may apply to other apps - my initial thought is that the files will be interchangeable, but if not then maybe yet another PITA? Just thinking about my old days w/ Windows and updates/upgrades to Word & Excel. Dave
    If you are helped, increase the reputation of the poster -

  7. #22
    macOS High Sierra APFS only support SSDs
    Slydude's Avatar
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    A new public beta just popped up for me. I'll try to test that specifically but I don't recall any previous issues.
    “Hard work beats talent when talent fails to work hard.”
    Kevin Durant

  8. #23
    macOS High Sierra APFS only support SSDs
    pm-r's Avatar
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    But my question is whether apps, such as updated Pages, Numbers, & Keynote writing to the new APFS can exchange their files w/ the older HFS+ if still on our iMac;

    I don't have a super accurate gazing ball, but I'd expect Apple to have things working pretty correctly and compatible as they did with the GUID changeover from APF (Apple Partition Map)/ HFS+ etc. format stuff.

    But my inner gut says it's not going to be quite so friendly accessing some older formats with backward compatibility and some users (support techs etc) having to rely on having at least two different OS X operating Macs. As an old retied fellow I know always just says — we shall see!!

    How to format a drive, or disc for maximum portability?
    https://discussions.apple.com/docs/DOC-3003




    - Patrick
    ======

  9. #24
    macOS High Sierra APFS only support SSDs
    Slydude's Avatar
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    Dave, I have my main drive formatted with the new APFS formatting. I can open documents stored on HFS+ drives with no issues. One thing I have noticed is that if I boot from my external HFS+ drive running Sierra it doesn't see my APFS drive. As far as I can tell, nothing in Sierra "sees" the APFS formatted drive. I can't, for example, go into the Startup preference pane and select the APFS drive if I am in Sierra.

    I've opened Apple and non Apple documents and programs with no issues so long as the versions are reasonably current. Even my QuickTime Pro 7 installation migrated over from Sierra and still works.
    “Hard work beats talent when talent fails to work hard.”
    Kevin Durant

  10. #25
    macOS High Sierra APFS only support SSDs
    chscag's Avatar
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    But my question is whether apps, such as updated Pages, Numbers, & Keynote writing to the new APFS can exchange their files w/ the older HFS+ if still on our iMac; of course, the issue may apply to other apps - my initial thought is that the files will be interchangeable, but if not then maybe yet another PITA? Just thinking about my old days w/ Windows and updates/upgrades to Word & Excel. Dave
    Dave:

    Apple has already stated that APFS and HFS+ will be interoperable. In other words they can read and write to each other - in the same way back when Windows 2000 was deployed and FAT-32 and NTFS could be used. There may come a time when Apple changes things and only APFS will be available. Much in the same way as today with Windows and NTFS.

  11. #26
    macOS High Sierra APFS only support SSDs
    ferrarr's Avatar
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    You need to be running macOS Sierra 6 (10.12.6) to be able to read APFS drives.
    -- Bob --
    Please backup. Everything has a life cycle, unexpected and warning free. Nothing will last as long as you want it to.

  12. #27
    macOS High Sierra APFS only support SSDs
    Slydude's Avatar
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    I don't think that is quite right. I haven't test this with the High Sierra beta that dropped today but that hasn't been true for some of the betas. In fact, the one I just replaced was listed in the store as a "developer beta". Under that beta Sierra did not recognize my APFS drive but the APFS beta would recognize Sierra and others.
    “Hard work beats talent when talent fails to work hard.”
    Kevin Durant

  13. #28
    macOS High Sierra APFS only support SSDs
    RadDave's Avatar
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    Thanks All for the comments - all of my computers are on macOS 10.12.6, so I suspect that if I upgrade my laptops to 'High Sierra' and even keep the iMac on Sierra 10.12.6, then I'll be fine w/ exchanging files, as needed - not that often as a 'retired ole fart' - Dave
    If you are helped, increase the reputation of the poster -

  14. #29
    macOS High Sierra APFS only support SSDs
    dtravis7's Avatar
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    I am on my late 2011 MBP 13" with Sierra 10.12.6 and the APFS drive shows on the desktop and everywhere else.
    Attached Images Attached Images
    Last edited by dtravis7; 09-02-2017 at 11:34 AM.

  15. #30
    macOS High Sierra APFS only support SSDs
    Slydude's Avatar
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    That's good to know Dennis. Not sure why it isn't showing for me -- especially since holding down the option key works for me. I'll have to boot into Sierra in a bit and check the settings to see if something has been changed.
    “Hard work beats talent when talent fails to work hard.”
    Kevin Durant

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