Urgent: 30mb/s over USB-C - mojave issue?

[pjny]

Hi,

I am getting about 30-40mb/s transfer speeds via USB C cables on my macbook 2015. Not sure why this is happening and speeds would increase if i reset smc/pram.

But now I am getting these slow speeds when transferring data from a Sony 300mb/s card via USB 3 cable. I am also getting the same via USB C-USB C cable to external Samsung EVO 860 SSD. I just got a
USB-IF Certified Cable Matters 10 Gbps Gen 2 USB C to USB C Cable and that did not help. The computer also stakks as images are being imported.

I tested internal disk speed with Blackmagic app and its about 200-300mb/second.

Could this is a mojave issue and would a reinstall help? I am about to reinstall even though I do not want to go through it i will do it it if it can help.

 

[chabig]

That sounds like hardware. All of the parts have to work together. Check you memory card adapter. You didn’t mention that piece.

 

[pjny]

Hi I ran a Mac laptop self-test and it reported nothing was wrong. What do you mean by memory card adapter?(sd card reader?) The laptop transfer speed is slow with whatever device you attach to the one usb-c port.

 

[pjny]

Just reinstalled fresh copy of Mojave 10.14.5 and still getting about 30mb/second transfer speed to Samsung SSD 860 via USB-IF Certified Cable Matters 10 Gbps Gen 2 USB C to USB C Cable.

could it be that i am transferring data from apfs encrypted volume (laptop ssd) to mac os x extended journaled encrypted drive?

Under system report I get and for some reason it states "Up to 480 Mb/sec" for usb 3 port.

USB 3.0 Bus:

Host Controller Driver: AppleUSBXHCIWPT
PCI Device ID: 0x9cb1
PCI Revision ID: 0x0003
PCI Vendor ID: 0x8086

USB 3.0 Desktop HD EP0 Product string:

Product ID: 0x55aa
Vendor ID: 0x174c (ASMedia Technology Inc.)
Version: 1.00
Serial Number: 00000000009C
Speed: Up to 480 Mb/sec
Manufacturer: ASMT
Location ID: 0x14100000 / 2
Current Available (mA): 500
Current Required (mA): 0
Extra Operating Current (mA): 0
Media:
2235:
Capacity: 1 TB (1,000,204,886,016 bytes)
Removable Media: No
BSD Name: disk2
Logical Unit: 0
Partition Map Type: GPT (GUID Partition Table)
USB Interface: 0
Volumes:
EFI:
Capacity: 209.7 MB (209,715,200 bytes)
File System: MS-DOS FAT32
BSD Name: disk2s1
Content: EFI
Volume UUID: 0E239BC6-F960-3107-89CF-1C97F78BB47B
disk2s2:
Capacity: 999.86 GB (999,860,912,128 bytes)
BSD Name: disk2s2
Content: Apple_CoreStorage
Boot OS X:
Capacity: 134.2 MB (134,217,728 bytes)
File System: Journaled HFS+
BSD Name: disk2s3
Content: Apple_Boot
Volume UUID: DFB494A1-8A45-3D5B-8061-8BA25B498729

 

[harriska2]

I take it the boot internal drive is the ssd 860?

What is the dos drive (209 mb)? I would remove it (thumbdrive?) and see if things improve. Also reboot the system.

Are you copying a bunch of files from the external 1tb to the internal ssd?

 

[chrfr]

I take it the boot internal drive is the ssd 860?

What is the dos drive (209 mb)? I would remove it (thumbdrive?) and see if things improve. Also reboot the system.

Are you copying a bunch of files from the external 1tb to the internal ssd?

The "DOS" drive is the EFI partition. It cannot be removed.
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Under system report I get and for some reason it states "Up to 480 Mb/sec" for usb 3 port.

This is why your copies are slow- the drive is connected at USB 2.0 speed.
You might check for a firmware update for your enclosure, or try a different enclosure altogether.

 

[pjny]

Hi,

The external enclosure in which the samsung 860 is in is a usb c enclosure. it is not usb 2 and i'm not sure why that shows up.

i have also tested it with two other usb 3 external drives and still getting 30mb/second.

the internal drive on my laptop is 250-300mb/s.

Here is with western digital usb 3 drive attached

USB 3.0 Bus:



Host Controller Driver: AppleUSBXHCIWPT

PCI Device ID: 0x9cb1

PCI Revision ID: 0x0003

PCI Vendor ID: 0x8086



USB2.0 Hub:



Product ID: 0x100f

Vendor ID: 0x05ac (Apple Inc.)

Version: 45.26

Speed: Up to 480 Mb/sec

Manufacturer: Apple Inc.

Location ID: 0x14100000 / 4

Current Available (mA): 500

Current Required (mA): 100

Extra Operating Current (mA): 0



My Passport 25E4:



Product ID: 0x25e4

Vendor ID: 0x1058 (Western Digital Technologies, Inc.)

Version: 40.05

Serial Number: 54581931343638373138435A

Speed: Up to 480 Mb/sec

Manufacturer: Western Digital

Location ID: 0x14110000 / 6

Current Available (mA): 500

Current Required (mA): 500

Extra Operating Current (mA): 0

Media:

My Passport 25E4:

Capacity: 4 TB (4,000,752,599,040 bytes)

Removable Media: No

BSD Name: disk2

Logical Unit: 0

Partition Map Type: GPT (GUID Partition Table)

USB Interface: 0

Volumes:

EFI:

Capacity: 209.7 MB (209,715,200 bytes)

File System: MS-DOS FAT32

BSD Name: disk2s1

Content: EFI

Volume UUID: 0E239BC6-F960-3007-89CF-1A67F78BB46B

disk2s2:

Capacity: 4 TB (4,000,408,625,152 bytes)

BSD Name: disk2s2

Content: Apple_APFS



USB-C Digital AV Multiport Adapter:



Product ID: 0x1460

Vendor ID: 0x05ac (Apple Inc.)

Version: 2.35

Serial Number: DLC511391AUG1LQBD

Speed: Up to 1.5 Mb/sec

Manufacturer: Apple Inc.

Location ID: 0x24120000 / 5

Current Available (mA): 500

Current Required (mA): 0

Extra Operating Current (mA): 0

The "DOS" drive is the EFI partition. It cannot be removed.
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This is why your copies are slow- the drive is connected at USB 2.0 speed.
You might check for a firmware update for your enclosure, or try a different enclosure altogether.

 

[harriska2]

2015 mbp has usb-c connections on it? Have you tried usb3 to usb3?

 

[chrfr]

Hi,

The external enclosure in which the samsung 860 is in is a usb c enclosure. it is not usb 2 and i'm not sure why that shows up.

I'm not sure either, but your Passport drive is also connected at USB 2 speed. Try connecting one disk at a time, with no other USB devices attached and see what the connection speed shows. How are you simultaneously connecting multiple drives to the MacBook, which has only one USB-C port on it?

 

[harriska2]

Are you copying a bunch of files from the external 1tb to the internal ssd?

 

[Honza1]

Unit check first, please...

Can you check proper units on what speeds are you getting? Mb is Mega-bit while MB is Megabyte - approximately 1MB = 10Mb.
Your internal drive surely has 250-300 MB/second - and not as you report Mb/s. You would get no where with 300Mb/sec (30MB/sec)... As comparison: My 2017 MBP Apple SSD clocks 1500MB/sec (that is 1.5Gigabyte per second) or more

Even 300MB/s is actually pretty slow for SSD, most should be around 500MB/second. That is Megabytes/second. Normal SATA speeds for magnetic "spinner" notebook drives were ~100 MB/sec (approx 1000Mb/sec) and every SSD I have used was 400+MB/sec (4000Mb/sec).

Your system reports 480 Mb/sec for your My Passport 25E4. That is 48 Megabytes/sec - and in reality, most of these ports will run 50-75% of advertised speed, so 30 Megabytes/second (MB/s) would be expected for this port. So that would match expectations and you will not fix that - if your reported speed is in MB/s and not in Mb/sec.

USB-3/C speeds should be much higher. As noted above, something is running at USB-2 speeds.

However, if you test really only 30 Mb/sec = that is only 3MB/sec (3 megabytes/second), well that is really poor speed and something is quite wrong.

Oh yes, and just to add "mb" would be milli-bits, for Mega we use "M". So it is MB for Megabytes and Mb for megabits.

So, can you sort out your units, please?

 

[pjny]

Hi,

I noticed that I get full speed(100-350megabyte/s) using Apple multiport hub if I plug the hub into the laptop USB-C port in the orientation where the USB A plug on the port is on the right hand side and the usb-c power port is on the left. If I flip the multiport hub and plug it into the laptop it slows down to 33mb/second.

I tested the multiport adaptor with wd 7200rpm drive and the samsung 860 and both were connected using usb micro to usb a(wd drive) and usb a-usb c for the 860.

I used to have this same issue with lightning port in my car. My phone would not charge if I plugged in the lightning port to charge in one way and if I flipped the lightning plug it would work.

Anyone know why this is happening. Very annoying.

Earlier:

On a hunch I decided to clean my the USB-C port on my laptop as well as the Digital AV Multiport Adapter.

This was a great video to guide me. I used the toothbrush method as well as compressed air.

I first just cleaned the usb-c port on the macbook and with usb-c direct plug to Samsung SSD blew the doors off Chronosync backup stats(about 230mb/second might be slow as the drive is 91% full but way faster than 40mb/s).

I then tested my external 7200 rpm drive via usb 3 connected to USB-C Digital AV Multiport Adapter and was disappointed I got very slow speeds which were the same as before. Then I decided to clean the USB-C Digital AV Multiport Adapter and got about 124-130 write and 125-132 read. I am backing up from laptop to wd 5tb drive and getting 120-125mb/s backup speeds which is about 3-4x what i was getting. Awesome!

I also downloaded 4.5gb from a Sony 300mb/s card in 1min 21 seconds using a Transcend USB 3.1 Gen 1 Type-C All-in-1 Multi-Card Reader. This is about 55mb/second. Not as fast as advertised but that would normally take 10 minutes or so before cleaning usb-c port.