Slow speed withe external SSD

[gabbas1]

Please delete!

I just found the problem.

 

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Hi guys,

 

i'm running an Odroid C4 with Armbian Jammy.

 

uname -a
Linux Homeserver 6.0.13-meson64 #22.11.2 SMP PREEMPT Sun Dec 18 16:52:19 CET 2022 aarch64 aarch64 aarch64 GNU/Linux

 

Everything works fine so far. Today I just bought an external ssd drive "SanDisk Portable SSD 1TB". I can mount and use it, but the speed seams quit slow to me. The packaging of the ssd say "up to 520MB/s" and the USB 3.0 ports should have higher speed than this:

 

dd if=/dev/zero of=/media/nextcloud/test bs=1M count=1024 conv=fdatasync,notrunc
1024+0 records in
1024+0 records out
1073741824 bytes (1.1 GB, 1.0 GiB) copied, 30.7941 s, 34.9 MB/s


echo 3 | sudo tee /proc/sys/vm/drop_caches (clear cached data)


dd if=/media/nextcloud/test of=/dev/null bs=1M count=1024 
1024+0 records in
1024+0 records out
1073741824 bytes (1.1 GB, 1.0 GiB) copied, 6.17649 s, 174 MB/s

 

It is mounted via fstab like this:

 

UUID=64f28769-a9c1-4011-ad9d-103eceb4bdfc   /media/test   ext4   defaults   0   2

 

After I attached the drive to the usb port dmesg says:

 

[504496.115044] usb 2-1.1: new SuperSpeed USB device number 3 using xhci-hcd
[504496.136011] usb 2-1.1: New USB device found, idVendor=0781, idProduct=55bb, bcdDevice=60.04
[504496.136026] usb 2-1.1: New USB device strings: Mfr=2, Product=3, SerialNumber=1
[504496.136031] usb 2-1.1: Product: Portable SSD
[504496.136036] usb 2-1.1: Manufacturer: SanDisk
[504496.136040] usb 2-1.1: SerialNumber: 323234384B4C343031363830
[504496.165630] scsi host0: uas
[504496.166400] usbcore: registered new interface driver uas
[504497.026910] scsi 0:0:0:0: Direct-Access     SanDisk  Portable SSD     6004 PQ: 0 ANSI: 6
[504497.040786] sd 0:0:0:0: Attached scsi generic sg0 type 0
[504527.525721] sd 0:0:0:0: [sda] tag#22 uas_eh_abort_handler 0 uas-tag 1 inflight: CMD IN 
[504527.525739] sd 0:0:0:0: [sda] tag#22 CDB: opcode=0x9e, sa=0x10 9e 10 00 00 00 00 00 00 00 00 00 00 00 20 00 00
[504527.541708] scsi host0: uas_eh_device_reset_handler start
[504527.621980] usb 2-1.1: reset SuperSpeed USB device number 3 using xhci-hcd
[504527.643980] scsi host0: uas_eh_device_reset_handler success
[504527.649863] sd 0:0:0:0: [sda] 1953525168 512-byte logical blocks: (1.00 TB/932 GiB)
[504527.650022] sd 0:0:0:0: [sda] Write Protect is off
[504527.650031] sd 0:0:0:0: [sda] Mode Sense: 37 00 10 00
[504527.650297] sd 0:0:0:0: [sda] Write cache: enabled, read cache: enabled, supports DPO and FUA
[504527.650448] sd 0:0:0:0: [sda] Preferred minimum I/O size 512 bytes
[504527.650456] sd 0:0:0:0: [sda] Optimal transfer size 1048576 bytes
[504527.670807] sd 0:0:0:0: [sda] Attached SCSI disk

 

lsusb says driver=uas. Is this about rigth?

 

lsusb
Bus 002 Device 003: ID 0781:55bb SanDisk Corp. Portable SSD
Bus 002 Device 002: ID 2109:0817 VIA Labs, Inc. USB3.0 Hub             
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 004: ID 1cf1:0030 Dresden Elektronik ZigBee gateway [ConBee II]
Bus 001 Device 002: ID 2109:2817 VIA Labs, Inc. USB2.0 Hub             
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

lsusb -t
/:  Bus 02.Port 1: Dev 1, Class=root_hub, Driver=xhci-hcd/1p, 5000M
    |__ Port 1: Dev 2, If 0, Class=Hub, Driver=hub/4p, 5000M
        |__ Port 1: Dev 3, If 0, Class=Mass Storage, Driver=uas, 5000M
/:  Bus 01.Port 1: Dev 1, Class=root_hub, Driver=xhci-hcd/2p, 480M
    |__ Port 1: Dev 2, If 0, Class=Hub, Driver=hub/4p, 480M
        |__ Port 3: Dev 4, If 0, Class=Communications, Driver=cdc_acm, 12M
        |__ Port 3: Dev 4, If 1, Class=CDC Data, Driver=cdc_acm, 12M

 

Has anyone an idea what I did wrong or what am I missing?

I feel like the ssd has USB 2.0 speeds. Could it be a problem with the driver?

 

For more information see:

https://paste.armbian.com/iyinumakiy
 

 

With kind regards,

Sebastian

Edited January 21, 2023 by gabbas1

[Werner]

We could delete but it would be worth more if you would share your solution.

[gabbas1]

Of course but it was just my fault.

I tested the wrong device.