Hi
I have a Raspberry Pi 4 Model B Rev 1.1 with 4GB running Latest Raspberry Pi OS Bookworm lite 64 bits
I recently added a Crucial X9 1To SSD
This SSD came with a small cable with USB-C connectors on both ends. Cannot use that.
I connected it in the Rpi USB3 port (blue) with a cable (phone type) USB-A to USB-C
I run some test and found poor performance.
Here is the result:read test gave approx. same results 35.4 MB/s
Thinking the cable is the culprit and I need a "real" USB3 to USB-C device I bought this one from Crucial
However after connecting it there is no change in performance! It's exactly the same.
Here is what lsub findsI search the web and the forum but found mainly problems related to jmicron usb to sata adapters.
However here on pibenchmarks one user with the exact same SSD managed to have 287MB/s. Its lsusb reported USB-3.20 5GB/s while mine is reporting 480MB/s (USB-2)
The logs provided by this anonymous user reports this:
Hub-3: 2-0:1 info: super-speed hub ports: 4 rev: 3.0 speed: 5 Gb/s (596.0 MiB/s)
I guess this is the problem: my Crucial adaptor USB-A to USB-C limits to USB-2. Crucial says it's 1GB/s !... Maybe on a PC but not on a Pi.
There is no much info on the logs provided by this anonymous user on what brand/type adapter used.
Worth to mention another benchmark by another user has exactly the same poor performance as I do.
Any advices?
Thank you.
I have a Raspberry Pi 4 Model B Rev 1.1 with 4GB running Latest Raspberry Pi OS Bookworm lite 64 bits
I recently added a Crucial X9 1To SSD
This SSD came with a small cable with USB-C connectors on both ends. Cannot use that.
I connected it in the Rpi USB3 port (blue) with a cable (phone type) USB-A to USB-C
I run some test and found poor performance.
Here is the result:
Code:
sylvain@Pi4:~ $ dd if=/dev/zero of=/tmp/tempfile bs=1M count=1024 conv=fdatasync1024+0 records in1024+0 records out1073741824 bytes (1.1 GB, 1.0 GiB) copied, 32.9819 s, 32.6 MB/sThinking the cable is the culprit and I need a "real" USB3 to USB-C device I bought this one from Crucial
However after connecting it there is no change in performance! It's exactly the same.
Here is what lsub finds
Code:
sylvain@Pi4:~ $ lsusbBus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hubBus 001 Device 005: ID 0463:ffff MGE UPS Systems UPSBus 001 Device 004: ID 062a:4101 MosArt Semiconductor Corp. Wireless Keyboard/MouseBus 001 Device 003: ID 0634:5605 Micron Technology, Inc. CT1000X9SSD9Bus 001 Device 002: ID 2109:3431 VIA Labs, Inc. HubBus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hubsylvain@Pi4:~ $ lsusb -t/: Bus 02.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/4p, 5000M/: Bus 01.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/1p, 480M |__ Port 1: Dev 2, If 0, Class=Hub, Driver=hub/4p, 480M |__ Port 2: Dev 3, If 0, Class=Mass Storage, Driver=uas, 480M |__ Port 3: Dev 4, If 0, Class=Human Interface Device, Driver=usbhid, 12M |__ Port 3: Dev 4, If 1, Class=Human Interface Device, Driver=usbhid, 12M |__ Port 4: Dev 5, If 0, Class=Human Interface Device, Driver=usbhid, 12MHowever here on pibenchmarks one user with the exact same SSD managed to have 287MB/s. Its lsusb reported USB-3.20 5GB/s while mine is reporting 480MB/s (USB-2)
The logs provided by this anonymous user reports this:
Hub-3: 2-0:1 info: super-speed hub ports: 4 rev: 3.0 speed: 5 Gb/s (596.0 MiB/s)
I guess this is the problem: my Crucial adaptor USB-A to USB-C limits to USB-2. Crucial says it's 1GB/s !... Maybe on a PC but not on a Pi.
There is no much info on the logs provided by this anonymous user on what brand/type adapter used.
Worth to mention another benchmark by another user has exactly the same poor performance as I do.
Any advices?
Thank you.
Statistics: Posted by sylvain1664 — Wed Mar 05, 2025 4:43 pm — Replies 0 — Views 64