[BUG] No data for USB external drive

[mhbates]

Describe the bug
Seagate external drive is listed but shows no data. It's a Seagate 14TB Expansion drive.

Screenshots

Log Files
time="2022-05-28T14:44:40Z" level=info msg="Executing command: smartctl --info -j -d sat /dev/sdg" type=metrics time="2022-05-28T14:44:40Z" level=error msg="Could not retrieve device information for sdg: exit status 2" type=metrics time="2022-05-28T14:45:43Z" level=error msg="no device WWN detected for sdg. Skipping collection for this device (no data association possible).\n" type=metrics

[AnalogJ]

@mhbates can you take a look at this issue: #255

When you run smartctl manually (with the addl flags) does everything work?

smartctl /dev/sdg -a -v 1,raw48:54 -v 7,raw48:54

[mhbates]

@AnalogJ Thanks for the quick response. No, it throws this:

Read Device Identity failed: scsi error unsupported field in scsi command
A mandatory SMART command failed: exiting. To continue, add one or more '-T permissive' options.

[AnalogJ]

Oh, i just noticed that you said it was an external Seagate 14TB Expansion drive.
Have you shucked it, and connected it via a SATA connector? or is it connected via USB?

[mhbates]

It's connected via USB. Do these just not support SMART?

[AnalogJ]

someone on Reddit with a similar issue mentioned that adding -T permissive worked for them. Can you try that?

smartctl (which Scrutiny uses under the hood) supports USB drives, but IIRC it doesn't detect them automatically.

[mhbates]

Still no luck, see screenshot below. I also found this Reddit thread, which has me thinking that when connected via USB, SMART just won't work: https://www.reddit.com/r/DataHoarder/comments/nc392f/how_can_i_read_the_smart_data_of_a_16_tb_seagate/

[AnalogJ]

You may need to play around with different --device, -d flag options to figure out which one works for your USB device:

https://webcache.googleusercontent.com/search?q=cache:HSSoogXbzrMJ:https://www.smartmontools.org/wiki/Supported_USB-Devices+&cd=1&hl=en&ct=clnk&gl=us&client=firefox-b-1-d

Try -d sat -T permissive and see if that works

[AnalogJ]

worst case you can try this:

https://github.com/AnalogJ/scrutiny/blob/beta/docs/TROUBLESHOOTING_DEVICE_COLLECTOR.md#volume-mount-all-devices-dev---privileged

Its the least secure option, but you can use it to run smartctl without any of the restrictions that docker imposes.

[ViRb3]

External HDDs support two modes of operation usb-storage (old, slower, stable) and uas (new, faster, sometimes unstable). On some external HDDs, uas mode does not properly pass through SMART information, or even causes hardware issues, so it has been disabled by the kernel. No amount of smartctl parameters will fix this, as it is being rejected by the kernel. This is especially true with Seagate HDDs. One solution is to force these devices into usb-storage mode, which will incur some performance penalty, but may work well enough for you. More info:

• https://www.smartmontools.org/wiki/Supported_USB-Devices
• https://www.smartmontools.org/wiki/SAT-with-UAS-Linux
• https://forums.raspberrypi.com/viewtopic.php?t=245931