RP2040-Zero on Ubuntu Linux: Write Protect is on

[iz8mbw]

CircuitPython version and board name

CircuitPython 9.2.7 RP2040-Zero

Code/REPL

import time
import board
import busio
import adafruit_scd4x
import adafruit_sht4x
import adafruit_sht31d

i2c = busio.I2C(board.GP1, board.GP0)
si2c = busio.I2C(board.GP3, board.GP2)

Behavior

[144854.408519] usb 9-2: new full-speed USB device number 4 using xhci_hcd
[144854.539664] usb 9-2: New USB device found, idVendor=2e8a, idProduct=101f, bcdDevice= 1.00
[144854.539669] usb 9-2: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[144854.539671] usb 9-2: Product: RP2040-Zero
[144854.539672] usb 9-2: Manufacturer: Waveshare Electronics
[144854.539674] usb 9-2: SerialNumber: XXXXXXXXXXXXXXXX
[144854.543214] cdc_acm 9-2:1.0: ttyACM0: USB ACM device
[144854.545048] usb-storage 9-2:1.2: USB Mass Storage device detected
[144854.545451] scsi host7: usb-storage 9-2:1.2
[144854.548951] input: Waveshare Electronics RP2040-Zero Keyboard as /devices/pci0000:00/0000:00:1e.0/0000:05:02.0/0000:07:1b.0/usb9/9-2/9-2:1.3/0003:2E8A:101F.0003/input/input9
[144854.636780] input: Waveshare Electronics RP2040-Zero Mouse as /devices/pci0000:00/0000:00:1e.0/0000:05:02.0/0000:07:1b.0/usb9/9-2/9-2:1.3/0003:2E8A:101F.0003/input/input10
[144854.636956] hid-generic 0003:2E8A:101F.0003: input,hidraw0: USB HID v1.11 Keyboard [Waveshare Electronics RP2040-Zero] on usb-0000:07:1b.0-2/input3
[144854.638579] usb 9-2: Quirk or no altset; falling back to MIDI 1.0
[144855.582288] scsi 7:0:0:0: Direct-Access     Waveshar RP2040-Zero      1.0  PQ: 0 ANSI: 2
[144855.583276] sd 7:0:0:0: Attached scsi generic sg2 type 0
[144855.588629] sd 7:0:0:0: [sdb] 2049 512-byte logical blocks: (1.05 MB/1.00 MiB)
[144855.594409] sd 7:0:0:0: [sdb] Write Protect is on
[144855.594414] sd 7:0:0:0: [sdb] Mode Sense: 03 00 80 00
[144855.595934] sd 7:0:0:0: [sdb] No Caching mode page found
[144855.595938] sd 7:0:0:0: [sdb] Assuming drive cache: write through
[144855.610203]  sdb: sdb1
[144855.611726] sd 7:0:0:0: [sdb] Attached SCSI removable disk

Description

Hello.
Using a RP2040-Zero on Linux Ubuntu 24.04.2 LTS (GNU/Linux 6.8.1-1019-realtime x86_64) and often when I connect the RP2040-Zero to USB the disk partition is in read only (Write Protect is on).

See this log about some plug and unplug of the RP2040-Zero to my machine:

[144829.465753] usb 9-2: new full-speed USB device number 3 using xhci_hcd
[144829.596618] usb 9-2: New USB device found, idVendor=2e8a, idProduct=101f, bcdDevice= 1.00
[144829.596624] usb 9-2: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[144829.596625] usb 9-2: Product: RP2040-Zero
[144829.596627] usb 9-2: Manufacturer: Waveshare Electronics
[144829.596628] usb 9-2: SerialNumber: XXXXXXXXXXXXXXXX
[144829.600903] cdc_acm 9-2:1.0: ttyACM0: USB ACM device
[144829.601943] usb-storage 9-2:1.2: USB Mass Storage device detected
[144829.602123] scsi host7: usb-storage 9-2:1.2
[144829.605795] input: Waveshare Electronics RP2040-Zero Keyboard as /devices/pci0000:00/0000:00:1e.0/0000:05:02.0/0000:07:1b.0/usb9/9-2/9-2:1.3/0003:2E8A:101F.0002/input/input7
[144829.697951] input: Waveshare Electronics RP2040-Zero Mouse as /devices/pci0000:00/0000:00:1e.0/0000:05:02.0/0000:07:1b.0/usb9/9-2/9-2:1.3/0003:2E8A:101F.0002/input/input8
[144829.698150] hid-generic 0003:2E8A:101F.0002: input,hidraw0: USB HID v1.11 Keyboard [Waveshare Electronics RP2040-Zero] on usb-0000:07:1b.0-2/input3
[144829.699709] usb 9-2: Quirk or no altset; falling back to MIDI 1.0
[144830.623142] scsi 7:0:0:0: Direct-Access     Waveshar RP2040-Zero      1.0  PQ: 0 ANSI: 2
[144830.624196] sd 7:0:0:0: Attached scsi generic sg2 type 0
[144830.627293] sd 7:0:0:0: [sdb] 2049 512-byte logical blocks: (1.05 MB/1.00 MiB)
[144830.628694] sd 7:0:0:0: [sdb] Write Protect is off
[144830.628699] sd 7:0:0:0: [sdb] Mode Sense: 03 00 00 00
[144830.630338] sd 7:0:0:0: [sdb] No Caching mode page found
[144830.630341] sd 7:0:0:0: [sdb] Assuming drive cache: write through
[144830.649779]  sdb: sdb1
[144830.650789] sd 7:0:0:0: [sdb] Attached SCSI removable disk
[144841.841194] usb 9-2: USB disconnect, device number 3
[144854.408519] usb 9-2: new full-speed USB device number 4 using xhci_hcd
[144854.539664] usb 9-2: New USB device found, idVendor=2e8a, idProduct=101f, bcdDevice= 1.00
[144854.539669] usb 9-2: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[144854.539671] usb 9-2: Product: RP2040-Zero
[144854.539672] usb 9-2: Manufacturer: Waveshare Electronics
[144854.539674] usb 9-2: SerialNumber: XXXXXXXXXXXXXXXX
[144854.543214] cdc_acm 9-2:1.0: ttyACM0: USB ACM device
[144854.545048] usb-storage 9-2:1.2: USB Mass Storage device detected
[144854.545451] scsi host7: usb-storage 9-2:1.2
[144854.548951] input: Waveshare Electronics RP2040-Zero Keyboard as /devices/pci0000:00/0000:00:1e.0/0000:05:02.0/0000:07:1b.0/usb9/9-2/9-2:1.3/0003:2E8A:101F.0003/input/input9
[144854.636780] input: Waveshare Electronics RP2040-Zero Mouse as /devices/pci0000:00/0000:00:1e.0/0000:05:02.0/0000:07:1b.0/usb9/9-2/9-2:1.3/0003:2E8A:101F.0003/input/input10
[144854.636956] hid-generic 0003:2E8A:101F.0003: input,hidraw0: USB HID v1.11 Keyboard [Waveshare Electronics RP2040-Zero] on usb-0000:07:1b.0-2/input3
[144854.638579] usb 9-2: Quirk or no altset; falling back to MIDI 1.0
[144855.582288] scsi 7:0:0:0: Direct-Access     Waveshar RP2040-Zero      1.0  PQ: 0 ANSI: 2
[144855.583276] sd 7:0:0:0: Attached scsi generic sg2 type 0
[144855.588629] sd 7:0:0:0: [sdb] 2049 512-byte logical blocks: (1.05 MB/1.00 MiB)
[144855.594409] sd 7:0:0:0: [sdb] Write Protect is on
[144855.594414] sd 7:0:0:0: [sdb] Mode Sense: 03 00 80 00
[144855.595934] sd 7:0:0:0: [sdb] No Caching mode page found
[144855.595938] sd 7:0:0:0: [sdb] Assuming drive cache: write through
[144855.610203]  sdb: sdb1
[144855.611726] sd 7:0:0:0: [sdb] Attached SCSI removable disk
[144865.872787] usb 9-2: USB disconnect, device number 4
[144872.418499] usb 9-2: new full-speed USB device number 5 using xhci_hcd
[144872.549227] usb 9-2: New USB device found, idVendor=2e8a, idProduct=101f, bcdDevice= 1.00
[144872.549233] usb 9-2: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[144872.549234] usb 9-2: Product: RP2040-Zero
[144872.549236] usb 9-2: Manufacturer: Waveshare Electronics
[144872.549237] usb 9-2: SerialNumber: XXXXXXXXXXXXXXXX
[144872.555569] cdc_acm 9-2:1.0: ttyACM0: USB ACM device
[144872.556622] usb-storage 9-2:1.2: USB Mass Storage device detected
[144872.557930] scsi host7: usb-storage 9-2:1.2
[144872.560645] input: Waveshare Electronics RP2040-Zero Keyboard as /devices/pci0000:00/0000:00:1e.0/0000:05:02.0/0000:07:1b.0/usb9/9-2/9-2:1.3/0003:2E8A:101F.0004/input/input11
[144872.653613] input: Waveshare Electronics RP2040-Zero Mouse as /devices/pci0000:00/0000:00:1e.0/0000:05:02.0/0000:07:1b.0/usb9/9-2/9-2:1.3/0003:2E8A:101F.0004/input/input12
[144872.654025] hid-generic 0003:2E8A:101F.0004: input,hidraw0: USB HID v1.11 Keyboard [Waveshare Electronics RP2040-Zero] on usb-0000:07:1b.0-2/input3
[144872.655175] usb 9-2: Quirk or no altset; falling back to MIDI 1.0
[144873.566221] scsi 7:0:0:0: Direct-Access     Waveshar RP2040-Zero      1.0  PQ: 0 ANSI: 2
[144873.567007] sd 7:0:0:0: Attached scsi generic sg2 type 0
[144873.570444] sd 7:0:0:0: [sdb] 2049 512-byte logical blocks: (1.05 MB/1.00 MiB)
[144873.572853] sd 7:0:0:0: [sdb] Write Protect is off
[144873.572859] sd 7:0:0:0: [sdb] Mode Sense: 03 00 00 00
[144873.579141] sd 7:0:0:0: [sdb] No Caching mode page found
[144873.579146] sd 7:0:0:0: [sdb] Assuming drive cache: write through
[144873.593854]  sdb: sdb1
[144873.594852] sd 7:0:0:0: [sdb] Attached SCSI removable disk

As you can see in this log there was 3 plug/unplug of RP2040-Zero to USB and the first time Write Protect was off then Write Protect was on and after Write Protect was off again.

How to have Write Protect is off always off?

Thanks.

Additional information

No response

[dhalbert]

If a write was in progress when you unplugged or hard-reset the board, the filesystem might have gotten corrupted, and then would come up as read-only. Do a sync before that, ideally, or wait a few seconds.

[iz8mbw]

No read and write was in progress since the usb volume (/dev/sdb1) was never mounted.

[tannewt]

Linux does read the filesystem before a mount happens. I think it is inspecting the FS for the label for example.

Please try the absolute latest builds too. I've been tweaking this behavior in the repo.

[dhalbert]

Also you can try a simple erase and reformat of the fileystem? In the REPL:

import storage
storage.erase_filesystem()