USB-C Port/Hub and External Portable SSD question

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Grateful4Linux
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USB-C Port/Hub and External Portable SSD question

Post by Grateful4Linux »

Code: Select all

System:    Kernel: 5.4.0-51-generic x86_64 bits: 64 compiler: gcc v: 7.5.0 Desktop: Cinnamon 4.4.8 
           Distro: Linux Mint 19.3 Tricia base: Ubuntu 18.04 bionic 
Machine:   Type: Desktop Mobo: SYWZ model: S200 Series serial: <filter> UEFI: American Megatrends v: 5.12 date: 05/09/2019 
Battery:   Device-1: hidpp_battery_0 model: Logitech K520 charge: 70% status: Discharging 
           Device-2: hidpp_battery_1 model: Logitech Wireless Mouse M325 charge: 55% status: Discharging 
CPU:       Topology: 6-Core model: Intel Core i7-8750H bits: 64 type: MT MCP arch: Kaby Lake rev: A L2 cache: 9216 KiB 
           flags: lm nx pae sse sse2 sse3 sse4_1 sse4_2 ssse3 vmx bogomips: 52799 
           Speed: 800 MHz min/max: 800/4100 MHz Core speeds (MHz): 1: 800 2: 800 3: 800 4: 800 5: 800 6: 800 7: 800 8: 800 
           9: 800 10: 800 11: 800 12: 800 
Graphics:  Device-1: Intel driver: i915 v: kernel bus ID: 00:02.0 
           Display: x11 server: X.Org 1.19.6 driver: modesetting unloaded: fbdev,vesa resolution: 2560x1440~60Hz 
           OpenGL: renderer: Mesa DRI Intel UHD Graphics 630 (CFL GT2) v: 4.6 Mesa 20.0.8 direct render: Yes 
Audio:     Device-1: Intel CM238 HD Audio driver: snd_hda_intel v: kernel bus ID: 00:1f.3 
           Device-2: Tenx type: USB driver: hid-generic,snd-usb-audio,usbhid bus ID: 1-1:2 
           Sound Server: ALSA v: k5.4.0-51-generic 
Network:   Device-1: Realtek RTL8111/8168/8411 PCI Express Gigabit Ethernet driver: r8169 v: kernel port: e000 bus ID: 01:00.0 
           IF: enp1s0 state: down mac: <filter> 
           Device-2: Intel Wireless-AC 9260 driver: iwlwifi v: kernel port: e000 bus ID: 02:00.0 
           IF: wlp2s0 state: up mac: <filter> 
Drives:    Local Storage: total: 476.94 GiB used: 187.83 GiB (39.4%) 
           ID-1: /dev/nvme0n1 vendor: Kingfast model: KingFast size: 476.94 GiB 
Partition: ID-1: / size: 466.31 GiB used: 187.57 GiB (40.2%) fs: ext4 dev: /dev/dm-1 
           ID-2: /boot size: 704.5 MiB used: 250.5 MiB (35.6%) fs: ext4 dev: /dev/nvme0n1p2 
           ID-3: swap-1 size: 980.0 MiB used: 6.1 MiB (0.6%) fs: swap dev: /dev/dm-2 
Sensors:   System Temperatures: cpu: 35.0 C mobo: N/A 
           Fan Speeds (RPM): N/A 
Info:      Processes: 363 Uptime: 4d 17h 09m Memory: 15.54 GiB used: 9.07 GiB (58.3%) Init: systemd runlevel: 5 Compilers: 
           gcc: 7.5.0 Shell: bash v: 4.4.20 inxi: 3.0.32 
Hello. I bought a SanDisk Extreme Pro Portable SSD which is supposed to have speeds up to 1050MB/s. Disks benchmark read and write speeds are both under 450 MB/s which is very disappointing.

I have it connected USB-C to USB-C with the included cable. I think my computer must have the slower USB hub even though the advertisement when I bought it made it seem like it is the fast version of USB-C. I remember reading (unfortunately a while after I purchased my computer) that USB-C is sometimes just the C type port but connected to the slower hub.

Here is my USB information from System Information and also from a command I ran:

Code: Select all

USB:       Hub: 1-0:1 info: Full speed (or root) Hub ports: 16 rev: 2.0 chip ID: 1d6b:0002 
           Device-1: 1-1:2 info: Tenx type: Audio,HID driver: hid-generic,snd-usb-audio,usbhid 
           rev: 1.1 chip ID: 1130:1620 
           Device-2: 1-2:3 info: Logitech Unifying Receiver type: Keyboard,Mouse,HID 
           driver: logitech-djreceiver,usbhid rev: 2.0 chip ID: 046d:c52b 
           Device-3: 1-4:6 info: N/A type: <vendor specific> driver: usbfs rev: 2.0 
           chip ID: 2207:0001 
           Device-4: 1-7:4 info: Intel type: Bluetooth driver: btusb rev: 2.0 chip ID: 8087:0025 
           Hub: 2-0:1 info: Full speed (or root) Hub ports: 8 rev: 3.0 chip ID: 1d6b:0003 


$ lsusb -t | grep xhci
/:  Bus 02.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/8p, 5000M
/:  Bus 01.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/16p, 480M
I am running Linux Mint 19.3 Cinnamon version, 64 bit architecture. Let me know if any other information is needed.

I don't have another computer with a true/confirmed USB-C port/hub to test this new portable SSD, so I am trying to determine if the low speed is a problem with the portable SSD or my computer. The earlier version of Sandisk Extreme SSD -- the non-Pro version -- was rated for speeds higher than what I am able to get. The Extreme Pro is supposed to be twice the non-Pro version -- up to 1,050 MB/s -- and in benchmark videos shows real world speeds in the 700s and 800s.

One other minor question. When I plugged the SSD in and checked the properties, the filesystem was listed as "FUSE", which I had never seen before. I read that Fuse is "bridge" to the filesystem to help with compatibility. Any chance that could be slowing it down? Any reason to reformat the drive?

I expect the reason for the slower than anticipated speed is that I don't actually have the USB-C 3.1 I thought I had, and it actually runs 3.0. Can anybody confirm that from the system information I posted? Thanks in advance for any help! :)
Last edited by Grateful4Linux on Sun Oct 18, 2020 6:13 pm, edited 1 time in total.
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Kadaitcha Man
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Re: USB-C Port/Hub and External Portable SSD question

Post by Kadaitcha Man »

Grateful4Linux wrote:
Sat Oct 17, 2020 11:48 pm
One other minor question.
There were no previous questions.

If you are in doubt about the specifications of your USB ports, consult your machine's manual.
It's pronounced kad-eye-cha, not kada-itcha.
senjoz
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Re: USB-C Port/Hub and External Portable SSD question

Post by senjoz »

USB 2.0 = 480 Mbps
USB 3.1 Gen 1 = 5 Gbps (USB 3.0)
USB 3.1 Gen 2 = 10 Gbps

USB-C denotes interface type only, not speed.

Regards, Jože
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MartyMint
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Re: USB-C Port/Hub and External Portable SSD question

Post by MartyMint »

Grateful4Linux wrote:
Sat Oct 17, 2020 11:48 pm
...which is supposed to have speeds up to 1050MB/s.
Theoretical burst speeds.

Other factors may influence actual reported benchmarks.
Grateful4Linux
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Re: USB-C Port/Hub and External Portable SSD question

Post by Grateful4Linux »

Kadaitcha Man wrote:
Sun Oct 18, 2020 12:19 am
Grateful4Linux wrote:
Sat Oct 17, 2020 11:48 pm
One other minor question.
There were no previous questions.

If you are in doubt about the specifications of your USB ports, consult your machine's manual.
There is no manual. I'm sorry I wasn't clear. I was wondering if anybody could tell from the information posted if the maximum speed I am supposed to get through my USB C port is USB 3.0 (I guess now called 3.1 gen 1) or the faster 3.1 gen 2?

When I bought this NUC mini I was led to believe the USB C port/hub is USB 3.1 gen 2, but given the information I posted above, it looks to me like it isn't the case.

I wasn't sure if I was wrong or missing something. The Extreme Pro SSD is supposed to have speeds about twice what I'm getting. I would just accept that's my answer to what my hub actually is, but I ordered it from Amazon during the Prime sale, and they are known for shipping counterfeit products.

The drive is labeled Extreme (not Extreme Pro) which caused me to think I received the wrong version, but then I watched unboxing videos and both versions are labeled the same.

Sorry if these are dumb questions or I wasn't clear.
MartyMint wrote:
Sun Oct 18, 2020 9:29 am
Grateful4Linux wrote:
Sat Oct 17, 2020 11:48 pm
...which is supposed to have speeds up to 1050MB/s.
Theoretical burst speeds.

Other factors may influence actual reported benchmarks.
Yes, I realize that. But if the hub is actually the one I thought it's supposed to be, it should be close to twice the benchmark speeds I'm getting. I expect the hub is unfortunately the slower version, but I wanted to make sure before I decide to whether to keep or return the SSD.
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Kadaitcha Man
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Re: USB-C Port/Hub and External Portable SSD question

Post by Kadaitcha Man »

Grateful4Linux wrote:
Sun Oct 18, 2020 10:58 am
When I bought this NUC mini I ... The drive is labeled Extreme (not Extreme Pro)
So far you have provided zero technical information to base any assessment on. Post the make and model of the drive, and the full output of inxi -Fxz. Nobody can say anything based on a few random lines of lsusb output.
It's pronounced kad-eye-cha, not kada-itcha.
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