First Cup of Ubuntu
No. Executeshould I create this folder?
sudo smartctl --xall /dev/sdb
while these drives are connected and accessible.
Do the problems disappear after you plug out and then plug in these drives? Do you need to restart the laptop to use these drives again?
Spilled the Beans
When I unplug the devices and plug them back in, they don't work. Only after rebooting the laptop are the drives available again
<--- Run xman to see that window.
Please learn to use command completion or tab completion in the shell. It is easy and will prevent ever getting the wrong file or directory name again. Forever. Look for a youtube video on it - since it is easy to explain in a video, but hard to explain clearly in text. 10 seconds and you are a master.Originally Posted by phile-mitti99
Basically, if you are typing more than 2-3 characters at a time, then you are doing it wrong.
I didn't look at anything other than the /dev/sd {whatever} part.
For more shell efficiencies: https://github.com/jlevy/the-art-of-command-line
Don't worry about knowing or understanding all of them. Skim everything and use what makes sense. Every 3-6 months (set a calendar entry), come back and re-skim it again. More things will make sense and you'll be more efficient. I'm more efficient with a shell in a terminal than using a mouse for almost everything. My brain thinks in a specific way to minimize typing, but still do what I want. File/directory "globbing" is very powerful. But some commands, like smartctl won't use globbed filenames that expand into more than 1 input at a time.
<--- Run xman to see that window.
And for commands you don't know, please, please, please, review the manpage for it. Every command on Unix-like systems has a manual page which explains all the options and inputs and outputs and how those can be formatted. There are caveats for when it doesn't work as expected and perhaps pitfalls. Administrator commands like hdparm and smartctl each have manpages that need to be read to ensure we don't do damage.
Spilled the Beans
For me there is no directory with /etc/sdb. I can write /etc/s and press tab, but it doesn't suggest the file sdb and when I enter /etc/sdb an error occurs because I don't have this file.
Smartctl open device: /dev/sdb failed: No such device
Does this file not exist because of my errors because of the USB?
<--- Run xman to see that window.
Well, /etc/ is wrong. Disk storage device files are under /dev/. And just to be clear - I've made exactly the same mistake, but I know when tab-completion "bonks" at me, it means the file doesn't exist, so I need to re-check my inputs. Also, each tool should come with a bash-completion update so ensure different inputs that are order-specific as options cannot be entered in the wrong order.
First Cup of Ubuntu
This is strange. Could you provide the kernel log from this laptop? It could be obtained by typing "dmesg" in the terminal. Do:When I unplug the devices and plug them back in, they don't work. Only after rebooting the laptop are the drives available again
This will cause the output of the dmesg command to be stored in a file called "dmesg_2020-04-06.txt". The ">" char instructs a redirection.Code:dmesg > dmesg_2020-04-06.txt
Please provide the kernel log after all the following: the drive stops working, you plug it out and then in.
This file can be attached in advanced editor on this forum - there is an icon in the top row.
<--- Run xman to see that window.
will show the "tail" of the file, in real-time.Code:dmesg -w
If you want to save it to a file, use
That example shows a USB3 converter with a microSD being removed, inserted and removed.Code:$ dmesg -w | tee /tmp/log.dmesg [884072.532135] usb 2-3: USB disconnect, device number 5 [884078.957120] usb 2-3: new SuperSpeed Gen 1 USB device number 6 using xhci_hcd [884078.984199] usb 2-3: New USB device found, idVendor=11b0, idProduct=3307, bcdDevice=0.13 [884078.984203] usb 2-3: New USB device strings: Mfr=3, Product=4, SerialNumber=2 [884078.984205] usb 2-3: Product: UHSII uSD Reader [884078.984207] usb 2-3: Manufacturer: Kingston [884078.984209] usb 2-3: SerialNumber: 000000000013 [884078.991763] usb-storage 2-3:1.0: USB Mass Storage device detected [884078.991936] scsi host16: usb-storage 2-3:1.0 [884080.002716] scsi 16:0:0:0: Direct-Access Kingston UHSII uSD Reader 0013 PQ: 0 ANSI: 6 [884080.003249] sd 16:0:0:0: Attached scsi generic sg2 type 0 [884080.394000] sd 16:0:0:0: [sdc] Spinning up disk... [884081.408185] .ready [884081.770634] sd 16:0:0:0: [sdc] 15954944 512-byte logical blocks: (8.17 GB/7.61 GiB) [884081.771436] sd 16:0:0:0: [sdc] Write Protect is off [884081.771438] sd 16:0:0:0: [sdc] Mode Sense: 21 00 00 00 [884081.772213] sd 16:0:0:0: [sdc] Write cache: disabled, read cache: enabled, doesn't support DPO or FUA [884081.804506] sdc: sdc1 [884081.807440] sd 16:0:0:0: [sdc] Attached SCSI removable disk [884089.400357] usb 2-3: USB disconnect, device number 6
The log.dmesg will have much more of dmesg output than we expect. Jump to the bottom, but in the terminal, just the last few lines are displayed.
Spilled the Beans
Re: USB drives switch off after a while
if my USB works it is as it should be. if the USB drives turn off I can do that again and send a piece of CODE.Code:[ 946.626629] usb 2-2: USB disconnect, device number 2 [ 953.368668] usb 2-2: new SuperSpeed Gen 1 USB device number 3 using xhci_hcd[ 953.390642] usb 2-2: New USB device found, idVendor=0480, idProduct=0900, bcdDevice= 3.15 [ 953.390646] usb 2-2: New USB device strings: Mfr=1, Product=2, SerialNumber=3 [ 953.390648] usb 2-2: Product: External USB 3.0 [ 953.390650] usb 2-2: Manufacturer: TOSHIBA [ 953.390651] usb 2-2: SerialNumber: 20200824007277F [ 953.391697] usb-storage 2-2:1.0: USB Mass Storage device detected
Spilled the Beans
My USB drives have switched off and I have written dmesg -w, when I unplug a device it does not log anything
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