New Member
Hi, I'm Thomas. I have a laptop with two USB 3 port. I have a curious stuff is happened, and I want to know if somebody knows was happened. The external SSD disk is plugging by convert cable. This cable is USB 2, and I plug to port USB 3.
Obviously the laptop doesn't see the sdd disk, but after a long time (about two hours) the disk is recognized and I can work fine with it.
The cable has two led the first one is red and the other one is blue. When I'm plugging the cable both led are on, and I can't access to SDD. After two hours the led blue is off, and I can access to the SDD.

I do nothing for this to happen.

I have 20.04.1 LTS (Focal Fossa)


Well-Known Member
USB 3 is 'supposed' to be backwards compatible with USB 2 devices.
Perhaps the USB port is not providing enough power? Some USB devices require two USB ports for sufficient power.
I don't know what the "convert cable" is but a faulty cable could cause issues.


New Member
Hi again.
I've been observing this issue and I want you to see dmesg output.
You see I boot the laptop about 11.35 the SSD was plugging to laptop at the same time and then system mount the SSD automatic at 13:07.
I really want to know what happens to solve this issue because I'd like to use this SSD for backup.

Kind Regards

[ene 9 11:35] input: i7S-TWS (AVRCP) as /devices/virtual/input/input27
[ene 9 11:56] perf: interrupt took too long (2511 > 2500), lowering kernel.perf_event_max_sample_rate to 79500
[ene 9 12:04] TCP: wlo1: Driver has suspect GRO implementation, TCP performance may be compromised.
[ene 9 12:11] perf: interrupt took too long (3155 > 3138), lowering kernel.perf_event_max_sample_rate to 63250
[ene 9 12:51] perf: interrupt took too long (4012 > 3943), lowering kernel.perf_event_max_sample_rate to 49750
[ene 9 12:57] input: i7S-TWS (AVRCP) as /devices/virtual/input/input28
[ene 9 13:07] usb 1-2.2: new high-speed USB device number 7 using xhci_hcd
[ +0,105299] usb 1-2.2: New USB device found, idVendor=14cd, idProduct=6116, bcdDevice= 2.20
[ +0,000003] usb 1-2.2: New USB device strings: Mfr=1, Product=3, SerialNumber=2
[ +0,000002] usb 1-2.2: Product: USB Mass Storage Device
[ +0,000001] usb 1-2.2: Manufacturer: Generic
[ +0,000001] usb 1-2.2: SerialNumber: 116AC2101219
[ +0,021407] usb-storage 1-2.2:1.0: USB Mass Storage device detected
[ +0,000653] scsi host1: usb-storage 1-2.2:1.0
[ +0,000179] usbcore: registered new interface driver usb-storage
[ +0,002265] usbcore: registered new interface driver uas
[ +1,026701] scsi 1:0:0:0: Direct-Access Mass Storage Device PQ: 0 ANSI: 0
[ +0,000527] sd 1:0:0:0: Attached scsi generic sg0 type 0
[ +0,105180] sd 1:0:0:0: [sda] 976773166 512-byte logical blocks: (500 GB/466 GiB)
[ +0,000152] sd 1:0:0:0: [sda] Write Protect is off
[ +0,000002] sd 1:0:0:0: [sda] Mode Sense: 03 00 00 00
[ +0,000283] sd 1:0:0:0: [sda] No Caching mode page found
[ +0,000006] sd 1:0:0:0: [sda] Assuming drive cache: write through
[ +0,019206] sda: sda1
[ +0,000915] sd 1:0:0:0: [sda] Attached SCSI disk
[ +0,223176] exfat: module is from the staging directory, the quality is unknown, you have been warned.
[ +0,000557] exFAT: Version 1.3.0
[ +0,000391] [EXFAT] trying to mount...
[ +0,174658] [EXFAT] mounted successfully

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