Geekzone: technology news, blogs, forums
Welcome Guest.
You haven't logged in yet. If you don't have an account you can register now.


367 posts

Ultimate Geek

#228832 24-Jan-2018 19:39
Send private message

Advice sought please - Mac Pro PCIe mounted Samsung AHCI SM951 Blade shows dismal write performance using Black Magic Free Speedtest… about 200 MB/s vs the read of about 1400 MB/s..


Tried allowing all the permissions on this PCIe Slot 3 mounted Samsung SM951 AHCI disc's boot OS, from different accounts, from another OS X with Yosemite 10.10.5 on it, tried SMC & PRAM resets.. removed all 6 other internal discs and the attached NAS, all the peripherals… went (right) back to a wired mouse/keyboard & 1 screen...… still can’t loosen up the permissions… pretty certain this is why I have a really really slow computer whenever some ‘writing’ is required (which is all the time)...


All Black Magic Free Speedtests show normal, thats internal SSD'd mounted in PCIe Slot 2, Internal SSDs mounted in the DVD Trays and SSD's & HDD's in the 4 Sled Trays etc.. it's just the one type of disc that I cannot get working properly, it's now the primary boot disc, with OS X High Sierra 10.13.2... it's a 256GB and runs about half used/half empty mostly...


It's the 1st time, and only time, that I have a disc I can't unlock all the permissions on, so thats my 'Guess #1'.


Pictures probably speak a thousand so...



Create new topic

367 posts

Ultimate Geek

  #1946301 24-Jan-2018 21:25
Send private message

It's weird how it identifies OS X High Sierra which is running in PCIe Slot 3 as 'external'... I've also booted into Yosemite, and tried to reset the permissions on the AHCI blade but Yosemite 10.10.5 Disk Utility won't recognise it fully, cos of it being on the backplane board in a PCIe slot or something, not too sure... I have no troubles with ordinary SSD's on PCIe cards, it's just this (supposedly) faster unit that is giving trouble.. (it is twice as fast as 2 x SSD's raided on a PCIe card in the machine but only reading due to the current 'write' issues).





It's in APFS file structure which I think is whats normal for this type of disc...








These other storage discs, spare OS's, backups etc... they all behave normally...













Trade NZ and US shares and funds with Sharesies (affiliate link).
849 posts

Ultimate Geek

  #1946364 25-Jan-2018 06:58
Send private message

God is dead.


3128 posts

Uber Geek

Lifetime subscriber

  #1946420 25-Jan-2018 09:15
Send private message


God is dead.

Not a particularly useful comment.

If the drive is stuffed just say that.


367 posts

Ultimate Geek

  #1946818 25-Jan-2018 18:48
Send private message

AUSSIE based Mac expert (DG) says 'enable trim force' in terminal... let us try that...  here's what happened after the Mac rebooted..





Lets test it now... and yip we are smokin'... GOD shows 1300-1400 MB/s of READ/WRITE speeeds using Black Magic Free Speed Test.


Thanks DG, legend man, so simple... just 3 words entered into terminal haha so so simple.


And so, GOD's perfectly ok.


Create new topic

News and reviews »

New Air Traffic Management Platform and Resilient Buildings a Milestone for Airways
Posted 6-Dec-2023 05:00

Logitech G Launches New Flagship Console Wireless Gaming Headset Astro A50 X
Posted 5-Dec-2023 21:00

NordVPN Helps Users Protect Themselves From Vulnerable Apps
Posted 5-Dec-2023 14:27

First-of-its-Kind Flight Trials Integrate Uncrewed Aircraft Into Controlled Airspace
Posted 5-Dec-2023 13:59

Prodigi Technology Services Announces Strategic Acquisition of Conex
Posted 4-Dec-2023 09:33

Samsung Announces Galaxy AI
Posted 28-Nov-2023 14:48

Epson Launches EH-LS650 Ultra Short Throw Smart Streaming Laser Projector
Posted 28-Nov-2023 14:38

Fitbit Charge 6 Review 
Posted 27-Nov-2023 16:21

Cisco Launches New Research Highlighting Gap in Preparedness for AI
Posted 23-Nov-2023 15:50

Seagate Takes Block Storage System to New Heights Reaching 2.5 PB
Posted 23-Nov-2023 15:45

Seagate Nytro 4350 NVMe SSD Delivers Consistent Application Performance and High QoS to Data Centers
Posted 23-Nov-2023 15:38

Amazon Fire TV Stick 4k Max (2nd Generation) Review
Posted 14-Nov-2023 16:17

Over half of New Zealand adults surveyed concerned about AI shopping scams
Posted 3-Nov-2023 10:42

Super Mario Bros. Wonder Launches on Nintendo Switch
Posted 24-Oct-2023 10:56

Google Releases Nest WiFi Pro in New Zealand
Posted 24-Oct-2023 10:18

Geekzone Live »

Try automatic live updates from Geekzone directly in your browser, without refreshing the page, with Geekzone Live now.

Are you subscribed to our RSS feed? You can download the latest headlines and summaries from our stories directly to your computer or smartphone by using a feed reader.