Here's a weird one: after a Samsung 840 pro 512gb has defaulted this week (applications didn't open, files couldn't be accessed any longer), I bought a Samsung evo 1TB SSD and installed it in my Macbook Pro. I restored from a time machine backup which worked fine.
The issue now is this: Using Blackmagic, I see appropriate write speeds, but only about half of the time (around 500MB/s write and read). The other half it's hovering around 200-300, and performance in general is worse than with the older Samsung 840 pro I had installed before.
When opening Finder windows and performing simple tasks I notice a lag that occasionally occurs, making the system as a whole sluggish and slow. Here's a youtube video showing the issue when using Blackmagic (any visible lag is from my system, not the video recording):
Has anybody experienced similar issues or does anybody have an idea what could be the root cause?
Some more info:
Trim is enabled
Disk utility does not show any issues
I have run both Onyx and TechTool Pro 9 to resolve any common issues such as partition map verification, ownership rights etc.
- the only thing I have noticed is that the inspector window shows that my user account does not have write access to the ssd (see image below), when I try to change that it says "The operation cannot be completed because you don't have the necessary permission", which is weird since I am the admin. Could it be related to this, and how would I got about changing that?
I am thankful for any hints, what other components could be the bottleneck here? Maybe the connection cable of the SSD to the motherboard? A faulty SSD controller chip?
Here's the Ethrecheck file:
EtreCheck version: 3.4.2 (436) Report generated 2017-08-18 18:53:19 Download EtreCheck from https://etrecheck.com Runtime: 4:00 Performance: Good Hardware Information: ⓘ MacBook Pro (13-inch, Mid 2012) [Technical Specifications] - [User Guide] - [Warranty & Service] MacBook Pro - model: MacBookPro9,2 1 2,9 GHz Intel Core i7 (i7-3520M) CPU: 2-core 16 GB RAM Upgradeable - [Instructions] BANK 0/DIMM0 8 GB DDR3 1600 MHz ok BANK 1/DIMM0 8 GB DDR3 1600 MHz ok Bluetooth: Good - Handoff/Airdrop2 supported Wireless: en1: 802.11 a/b/g/n Battery: Health = Normal - Cycle count = 34 Video Information: ⓘ Intel HD Graphics 4000 - VRAM: 1536 MB Color LCD 2560 x 1440 DELL U2713HM 2560 x 1440 @ 59 Hz Disk Information: ⓘ Samsung SSD 850 EVO 1TB disk0: (1 TB) (Solid State - TRIM: Yes) [Show SMART report] EFI (disk0s1 - MS-DOS FAT32) <not mounted> [EFI]: 210 MB (disk0s2) <not mounted> [CoreStorage Container]: 999.35 GB Recovery HD (disk0s3 - Journaled HFS+) <not mounted> [Recovery]: 650 MB ST1000LM024 HN-M101MBB disk1: (1 TB) (Rotational) [Show SMART report] EFI (disk1s1 - MS-DOS FAT32) <not mounted> [EFI]: 210 MB HDD (disk1s2 - Journaled HFS+) /Volumes/HDD : 500.10 GB (76.47 GB free) HDD2 (disk1s3 - Journaled HFS+) /Volumes/HDD2 : 499.62 GB (4.67 GB free) Virtual disks: ⓘ SSD (disk2 - Journaled HFS+) / [Startup]: 998.98 GB (463.40 GB free) Physical disk: disk0s2 999.35 GB Online System Software: ⓘ macOS Sierra 10.12.6 (16G29) - Time since boot: about one hour Top Processes by Memory: ⓘ 1.35 GB kernel_task 458 MB Google Chrome Helper 392 MB Google Chrome Helper 389 MB Google Chrome Helper 375 MB Google Chrome Helper Top Processes by Network Use: ⓘ Input Output Process name 169 MB 43 MB openvpn 76 KB 36 KB mDNSResponder 28 KB 52 KB usbmuxd 9 KB 5 KB netbiosd 96 B 96 B ntpd Top Processes by Energy Use: ⓘ 16.28 Google Chrome Helper 15.90 WindowServer 12.36 Google Chrome 7.86 Google Chrome Helper