Hybrid SSHD drives in SATA1 PPCs & G5s ok?

Discussion in 'PowerPC Macs' started by Eriamjh1138@DAN, Apr 4, 2018.

  1. Eriamjh1138@DAN macrumors 6502a

    Eriamjh1138@DAN

    Joined:
    Sep 16, 2007
    Location:
    BFE, MI
    #1
    I've searched and can't find a conclusive answer so I thought I'd ask.

    I am well aware of the SATA1 limitations in the PMG5s that prevents us from using SATA3 SSDs (SATA2 OK, if you can find them), and I believe I have seen that the SATA3 HDD spinners are OK as long as they have a SATA1 jumper on them you can force.

    So are the hybrid SSHDs OK to use in G5s as boot drives? I want the speed of the SSD but the capacity of the spinner HDD. If so, does anyone have any recommendations.

    Are they worth it? I can get 2TB for $100 from amazon and I haven't' price-shopped anywhere else yet.
     
  2. dbdjre0143 macrumors regular

    dbdjre0143

    Joined:
    Nov 11, 2017
    Location:
    West Virginia
    #2
    I can't speak specifically to application in the PMG5, but I'd recommend reading up on the advantages of the hybrid drive. I looked into them a bit awhile back when considering them for a PC, and my reading led me away, because my understanding was that they do not provide nearly the speed boost of a real SSD (which makes sense as they are essentially just a traditional spinner with a large SSD-cache). Of course YMMV on the speed boost, since that depends on the application and how "smart" the drive is about what it puts on that SSD-portion.
    This is a decent article discussing the above from a quick Google, though I can't say I know too much about the validity of the source, so take it with a grain of salt and more searching of your own: https://www.ghacks.net/2013/11/04/need-know-solid-state-hybrid-drives-sshd/
    However, at $100 for a 2TB hybrid drive, I would say the smarter money could be in purchasing two drives, a smallish boot SSD and a large spinner for data storage.
     
  3. swamprock macrumors 6502a

    swamprock

    Joined:
    Aug 2, 2015
    Location:
    Michigan
    #3
    This is exactly what I did in my 2004 DP2.0 G5. Luckily for me, we have two electronics recyclers in town, and I am able to get ahold of SATA 2 SSDs at a fairly decent price. My boot drive is an older Samsung 128mb SSD (PM500 or something like that; I forget the exact model and I'm at work right now), and my slave drive is a 500mb Samsung spinner. Stay away from Micron SATA2 SSDs, though, that were in HP laptops. They don't work at all with the G5.
     
  4. Eriamjh1138@DAN thread starter macrumors 6502a

    Eriamjh1138@DAN

    Joined:
    Sep 16, 2007
    Location:
    BFE, MI
    #4
    I appreciate the responses. The 8Gb is pretty small in an SSHD. It’s Either speed or capacity. A PMG5 can have both Sind wit has 2 drive bays. My iMac can have either. I just have to decide which one it deserves.

    I’ll go with speed.
     
  5. AphoticD macrumors 68000

    AphoticD

    Joined:
    Feb 17, 2017
    Location:
    Australia
    #5
    Has anybody tried to software RAID 2x fast SSDs in a G5? In theory, the G5 should be capable of a bootable SSD RAID with ~300MB/sec throughput with the two SATA I busses combined.
     
  6. Project Alice macrumors 6502

    Project Alice

    Joined:
    Jul 13, 2008
    Location:
    Post Falls, ID
    #6
    I was under the impression that sata was completely backward compatible? I've had no problem using sata 2 and 3 in sata 1 PCs. I have no idea what types of drives are in my Powermac G5 at the moment, I didnt bother to check I just installed them. Is there some weird limitation on G5s that prevent the use of newer drives or something?
     
  7. Eriamjh1138@DAN thread starter macrumors 6502a

    Eriamjh1138@DAN

    Joined:
    Sep 16, 2007
    Location:
    BFE, MI
    #7
    PMG5s have a problem with SATA III SSDs (but not spinners) on their SATA 1 busses. There’s something wrong with the way the backwards compatibility was implemented or with the way SATA1 was implemented on the PMs. It’s well known to G5 owners.

    G5center.net has a page about it under Hardware.

    Add to that the issues with lack of trim and overprovisioning and you have... a PMG5 challenge.

    Anywhoo, I’m copying my iMac setup to a 100GB Vertex SATA II drive and should be able to test it tonight or this weekend. I think I’ll bend over and just buy an OWC 3G Drive for the PM.
     
  8. AphoticD macrumors 68000

    AphoticD

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    Feb 17, 2017
    Location:
    Australia
    #8
  9. LightBulbFun macrumors 68000

    LightBulbFun

    Joined:
    Nov 17, 2013
    Location:
    London UK
    #9
    if its worth anything when I was buying a 500GB Samsung 850 Evo late last year for my Mac Pro 5,1 I briefly chucked it into my G5 Quad to see what it would do, and much to my pleasant surprise it showed up fine :) I didn't run any benchmarks or the like on it tho.

    as for RAIDing SSDs in a G5, it depends on the architecture of the K2 SATA controller (are the 2 SATA buses completely independent of each other or are they sharing the same link somewhere?) , it would be very interesting to try and see what benchmark results one would get :)
     
  10. Eriamjh1138@DAN thread starter macrumors 6502a

    Eriamjh1138@DAN

    Joined:
    Sep 16, 2007
    Location:
    BFE, MI
    #10
    Knowing if the Samsung 850 SSDs work in the PMG5 would be of great value to the community.

    As for SATA busses being combined or separate, I'm no expert, but I would hope that Apple implemented them so that they can be maximized in a PowerMac and made them as independent as possible.
     
  11. vddrnnr macrumors member

    vddrnnr

    Joined:
    Jan 23, 2017
    #11
    Hi all,

    I'm using a TOSHIBA Q300 SATAIII SSD drive in one of my powermac g5's.
    It's running in slot B, in slot A it wouldn't detect it and also
    with two drives it wouldn't work.
    So I think it really depends on a combination of factors and not just being SATAIII.
    Other older SSDs I tries would not work even though they where not SATAIII,

    Best regards,
    voidRunner
     
  12. ziggy29 macrumors 6502

    Joined:
    Oct 29, 2014
    Location:
    Oregon North Coast
    #12
    At one point I temporarily hooked up a Sammy EVO 850 internally to the second SATA port on my Quad G5 and it worked fine.... but it was just to test data transfer on an unused partition of the drive. So while it worked with what little I did, I never used it as a boot drive or for sustained usage.
     

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