I've noticed this issue over the last couple of weeks, but didn't pinpoint the cause until today. Sometimes when my external HD is connected to my MBP, the copy speed to and from that device is extremely slow (based on eyeballing the Finder copy speed it's about 100-1000KB per second).
The enclosure is a TerraMaster D2-310 USB 3.1 running two 3TB drives (WD I think) in a Raid1 configuration. The drives and the enclosure are less than 1 year old and have ~800GB space free. I can see that when it's slow, both drive activity lights are constantly on, which suggests to me that something is happening on the drive(s) even when no applications are actively using them.
If I look at the disk activity in activity monitor, I see kernel_task, launchd and mds_stores have a lot of disk activity, however I'm not sure how current that is or what it means! Disconnecting the drive (which also takes a long time) and reconnecting it seems to solve the problem for a while, which also suggests to me that it's something s/w related.
I realize the problem could be hardware or software, however I'm not sure how to troubleshoot further. Any advice would be greatly appreciated!
https://www.amazon.ca/gp/your-accou...8&ij=&opt=ab&ref_=&search=701-0849950-5169813
The enclosure is a TerraMaster D2-310 USB 3.1 running two 3TB drives (WD I think) in a Raid1 configuration. The drives and the enclosure are less than 1 year old and have ~800GB space free. I can see that when it's slow, both drive activity lights are constantly on, which suggests to me that something is happening on the drive(s) even when no applications are actively using them.
If I look at the disk activity in activity monitor, I see kernel_task, launchd and mds_stores have a lot of disk activity, however I'm not sure how current that is or what it means! Disconnecting the drive (which also takes a long time) and reconnecting it seems to solve the problem for a while, which also suggests to me that it's something s/w related.
I realize the problem could be hardware or software, however I'm not sure how to troubleshoot further. Any advice would be greatly appreciated!
https://www.amazon.ca/gp/your-accou...8&ij=&opt=ab&ref_=&search=701-0849950-5169813
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