Barefeats - Slow G5 Sustained Write Firwire RAID

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big macbig mac
Posted:
in Current Mac Hardware edited January 2014
I realize that many hold Barefeats in disrepute, but I'm wondering if I should be concerned about Morgan's data that indicate the G5 is significantly slower than the G4 at sustained writes to Firewire RAIDs. Disturbingly, this issue apparently effects Firewire PCI cards in addition to the built-in Firewire. Moreover, he claims the problem has not been corrected in the Rev B G5. Interestingly, I cannot find another source for confirmation on the subject. Why do I care? Well, I don't know if I'll be using a Firewire RAID, but I just ordered a 2.0DP, so I certainly am interested in all things G5 now.

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  • Reply 1 of 7
    existenceexistence Posts: 991member
    These new G5s not are "rev B". They are the same old G5s refitted with prices reduced.
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  • Reply 2 of 7
    big macbig mac Posts: 480member
    Upon which empirical grounds do you base your assessment, Existence? Morgan claims the machines are labeled as 7,3, as opposed to the first G5s, which were 7,2. They may not be huge revisions, but no one ever said revisions had to be huge. Just take a look at the numerous minor revisions of the CRT iMacs.
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  • Reply 3 of 7
    deadeyedeadeye Posts: 26member
    Quote:

    Originally posted by Big Mac

    I realize that many hold Barefeats in disrepute, but I'm wondering if I should be concerned about Morgan's data that indicate the G5 is significantly slower than the G4 at sustained writes to Firewire RAIDs. Disturbingly, this issue apparently effects Firewire PCI cards in addition to the built-in Firewire. Moreover, he claims the problem has not been corrected in the Rev B G5. Interestingly, I cannot find another source for confirmation on the subject. Why do I care? Well, I don't know if I'll be using a Firewire RAID, but I just ordered a 2.0DP, so I certainly am interested in all things G5 now.



    Here is another source. An exert from this linked page @ xlr8yourmac:



    Quote:

    Even testing a single Firewire400 drive (200GB oxford911 bridge based case) shows lower performance on my Dual G5/2GHz than even a PowerBook G4 Alum. model. (Appx 5MB/sec lower performance than the G4 in tests with that drive.) Not a show-stopper for home users but disappointing. (Performance is also reportedly lower with high end FW800/RAIDed drives.)



    I have an OWC FW 800 drive on my 1.8 MP (refurb). At the OWC site under more info pertaining to the drive I bought (Hitachi - 2VLAT80 - 120GB Mercury Elite) there is a speed test result using a PB 1 GHz. It is slightly better than the results I get from the G5 using the same test:



    My test: (G5 1.8 MP)

    Extended Test Size: 20 MB Read: 55.243 MB/sec Write: 53.907 MB/sec



    OWC results: (PB 1 GHz)



    Extended Test Size: 20 MB Read: 52.939 MB/sec Write: 67.000 MB/sec



    As to the Rev. A - Rev. B thing, here is a thread at Apple's site about whether or not the 90nm is used in all the new models. The jury is still out it would appear. However, clearly there are differences (PCI X, # of RAM slots), so, no matter if you think the changes are significant or not, they are 'Rev B'.
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  • Reply 4 of 7
    big macbig mac Posts: 480member
    Thank you for the information, deadeye. This is a bit bothersome but not a show-stopper by any means.

    Quote:

    Originally posted by deadeye

    As to the Rev. A - Rev. B thing, here is a thread at Apple's site about whether or not the 90nm is used in all the new models. The jury is still out it would appear. However, clearly there are differences (PCI X, # of RAM slots), so, no matter if you think the changes are significant or not, they are 'Rev B'.



    The original 1.8 and DP 2 contained three PCI-X slots and eight RAM slots, the same as the new 2.0 and 2.5. The only obvious difference in the line-up is the absence of the 1.6, in favor of the DP 1.8, which moved to the entry-level and now shares the 1.6 board.
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  • Reply 5 of 7
    ipodandimacipodandimac Posts: 3,273member
    Quote:

    Originally posted by Existence

    These new G5s not are "rev B". They are the same old G5s refitted with prices reduced.



    Actually ALL the new models ARE the fx processor. (Just confirmed by AI)
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  • Reply 6 of 7
    existenceexistence Posts: 991member
    Quote:

    Originally posted by ipodandimac

    Actually ALL the new models ARE the fx processor. (Just confirmed by AI)



    Wrong.

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  • Reply 7 of 7
    applenutapplenut Posts: 5,768member
    Quote:

    Originally posted by ipodandimac

    Actually ALL the new models ARE the fx processor. (Just confirmed by AI)



    uhg, this is so annoying.



    THEY ARE 970 NOT FX



    This was confirmed by Apple just an hour or two after their release.
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