Rockpi 4B external hard drive not found after warm boot

Hi All,

I recently setup a small server at my holiday hosue using a RockPi 4B v1.3 and running Armbian. It has a 2TB 2.5" external hard drive and has been running fine for several weeks.

I recently added a second 2.5" portable hard drive and partitioned it fine, but after a soft reboot (ie sudo reboot), the new drive wasn’t found.

dmesg shows:
[ 3.877060] sd 1:0:0:0: [sdb] Unit Not Ready
[ 3.877082] sd 1:0:0:0: [sdb] Sense Key : 0x4 [current]
[ 3.877094] sd 1:0:0:0: [sdb] ASC=0x44 <>ASCQ=0x81

Any ideas?

After an unplug/reboot, dmesg shows:
[75734.552263] usb 6-1: USB disconnect, device number 2
[75737.559808] usb 6-1: new SuperSpeed USB device number 3 using xhci-hcd
[75737.581298] usb 6-1: New USB device found, idVendor=0bc2, idProduct=2037, bcdDevice=19.01
[75737.581339] usb 6-1: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[75737.581362] usb 6-1: Product: Expansion HDD
[75737.581381] usb 6-1: Manufacturer: Seagate
[75737.581400] usb 6-1: SerialNumber: 00000000NAC5MKA3
[75737.583286] usb 6-1: UAS is ignored for this device, using usb-storage instead
[75737.583317] usb-storage 6-1:1.0: USB Mass Storage device detected
[75737.584389] usb-storage 6-1:1.0: Quirks match for vid 0bc2 pid 2037: 800000
[75737.584713] scsi host1: usb-storage 6-1:1.0
[75738.600671] scsi 1:0:0:0: Direct-Access Seagate Expansion HDD 1901 PQ: 0 ANSI: 6
[75738.601867] sd 1:0:0:0: Attached scsi generic sg0 type 0
[75743.224634] sd 1:0:0:0: [sda] Very big device. Trying to use READ CAPACITY(16).
[75743.224837] sd 1:0:0:0: [sda] 7814037167 512-byte logical blocks: (4.00 TB/3.64 TiB)
[75743.224845] sd 1:0:0:0: [sda] 4096-byte physical blocks
[75743.225155] sd 1:0:0:0: [sda] Write Protect is off
[75743.225164] sd 1:0:0:0: [sda] Mode Sense: 47 00 00 08
[75743.225490] sd 1:0:0:0: [sda] Write cache: enabled, read cache: enabled, doesn’t support DPO or FUA
[75743.909269] sda: sda1
[75743.910741] sd 1:0:0:0: [sda] Attached SCSI disk

One thought is that the USB3 sockets don’t provide enough power - the Radxa site states:
How much mA can i get from the USB 3 and 2 ports for charging or use a 2.5" disk?

The upper USB3.0 OTG has one dedicated current limit control which is 1.45A. The rest USB 3.0 HOST and the two USB 2.0 HOST share a current limit control of 3A together

Any additional ideas?



What power adapter are you using?

18W USB PD Power supply -

If you want to use two hard drive, change to a 30W or more power adapter.

OK - I’ll order one now and install when I’m next at the holiday house.

OK so I changed over to a 30W USB PD power supply today, and still had no 4TB drive after a reboot.

Originally, I had both hard drives connected to the USB 3 ports. I moved one of them to a USB 2 port and now both drives seem to survive the reboot. The ‘working’ configuration is as per