Warped Posted May 29, 2014 Share Posted May 29, 2014 Hi * I just become curious why my hackintosh become slow regarding disk access. I have Samsung SSD 840 and I remember when I installed it some time ago - I was shocked about speed-up. Now 10.9 has subjective speed on this SSD the same like on booted on my 1T WD black. Running BlackMagic Speed test shows 78/85 MB/s speed on Samsung SSD. To compare my MacBookAir has 190/620 MB/s. Recently I also tested fresh, new Intel320 SSD on my hackintosh - and speed is still 70-80 MB/s for r/w - so issue seems to be within OS. Where problem might be ? My spec: GA-P35-DS4 Q6600@3.2 8G RAM OSX 10.9.3 clover 2618 br Link to comment https://www.insanelymac.com/forum/topic/298330-slow-ssd-under-1093but-why/ Share on other sites More sharing options...
Lacedaemon Posted May 29, 2014 Share Posted May 29, 2014 Open System Information.app and go to the "SATA/SATA Express" section. Select your SSD and go down the list until you find "TRIM Support". If it says "no", you have two options: 1. Use myHack to reapply the TRIM patch -or- 2. If using Clover: http://clover-wiki.zetam.org/Configuration/KernelAndKextPatches#KextsToPatch 1 Link to comment https://www.insanelymac.com/forum/topic/298330-slow-ssd-under-1093but-why/#findComment-2023168 Share on other sites More sharing options...
Warped Posted May 30, 2014 Author Share Posted May 30, 2014 Thx for replay. Unfortunately I managed to heave trim=on for both disks (via clover). Also - even if trim is off - why brand new Intel320 also have so low speed? Link to comment https://www.insanelymac.com/forum/topic/298330-slow-ssd-under-1093but-why/#findComment-2023215 Share on other sites More sharing options...
iFIRE Posted May 30, 2014 Share Posted May 30, 2014 check if in AppleAHCI.kext in the info.plist, if is presente the device id for your Controller Sata, then put your HD in Port SATA 0 and if in the BIOS/ SATA to AHCI Link to comment https://www.insanelymac.com/forum/topic/298330-slow-ssd-under-1093but-why/#findComment-2023221 Share on other sites More sharing options...
Warped Posted June 19, 2014 Author Share Posted June 19, 2014 AHCI controles PCI ID are present in AppleAHCIport.kext. PCI ID is 8086:2681. It is identified as ESB2 AHCI. SSD disk is on port0. BIOS has AHCI as without it booting OSX is rather difficult... As it has NCQ working - I believe AHCI chipset must be fully recognised & supported. Also TRIM is marked as supported I'm on 10.9.3 with Clover 2618. I remember sometime ago (I think 10.8.x times) I had SSD working OK (I mean fast as it should be) Maybe I should start to replace AHCI components to older ones and see where is regression? Which component is best to start? Link to comment https://www.insanelymac.com/forum/topic/298330-slow-ssd-under-1093but-why/#findComment-2032060 Share on other sites More sharing options...
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