MiSTer FPGA Forum

Posted: **Mon Jun 29, 2020 1:04 am**

I have a Samsung 860 QVO SSD in a QGeeM USB enclosure formatted as exfat, and when connected to my MiSTer, it will mount, and then a short time later will unmount, and then repeat the process. If I look at the kernel log, I see repeated entries like the following:

[ 852.080563] usb 1-1.2: new high-speed USB device number 34 using dwc2
[ 852.174422] usb 1-1.2: New USB device found, idVendor=2109, idProduct=0715, bcdDevice=f0.00
[ 852.174433] usb 1-1.2: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[ 852.174440] usb 1-1.2: Product: QGeeM
[ 852.174446] usb 1-1.2: Manufacturer: QGeeM
[ 852.174452] usb 1-1.2: SerialNumber: 000000123B8F
[ 852.175910] usb 1-1.2: The driver for the USB controller dwc2_hsotg does not support scatter-gather which is
[ 852.175921] usb 1-1.2: required by the UAS driver. Please try an other USB controller if you wish to use UAS.
[ 852.176010] usb 1-1.2: The driver for the USB controller dwc2_hsotg does not support scatter-gather which is
[ 852.176017] usb 1-1.2: required by the UAS driver. Please try an other USB controller if you wish to use UAS.
[ 852.176025] usb-storage 1-1.2:1.0: USB Mass Storage device detected
[ 852.178057] scsi host1: usb-storage 1-1.2:1.0
[ 853.217266] scsi 1:0:0:0: Direct-Access QGeeM QGeeM 2210 PQ: 0 ANSI: 6
[ 853.223721] sd 1:0:0:0: [sdb] Very big device. Trying to use READ CAPACITY(16).
[ 853.224209] sd 1:0:0:0: [sdb] 7814037168 512-byte logical blocks: (4.00 TB/3.64 TiB)
[ 853.225208] sd 1:0:0:0: [sdb] Write Protect is off
[ 853.225219] sd 1:0:0:0: [sdb] Mode Sense: 2f 00 00 00
[ 853.226208] sd 1:0:0:0: [sdb] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA
[ 853.239495] sdb: sdb1 sdb2
[ 853.246664] sd 1:0:0:0: [sdb] Attached SCSI disk
[ 853.715627] FAT-fs (sdb1): Volume was not properly unmounted. Some data may be corrupt. Please run fsck.
[ 858.725148] [EXFAT] trying to mount...
[ 860.143703] [EXFAT] mounted successfully
[ 861.707886] EXT4-fs (loop8): re-mounted. Opts: (null)
[ 901.305054] usb 1-1.2: USB disconnect, device number 34
[ 901.314111] sd 1:0:0:0: [sdb] Synchronizing SCSI cache
[ 901.314304] sd 1:0:0:0: [sdb] Synchronize Cache(10) failed: Result: hostbyte=0x01 driverbyte=0x00
[ 901.414520] [EXFAT] trying to unmount...
[ 901.415189] [EXFAT] unmounted successfully

Any ideas of what the issue might be, or any other place I could look to diagnose this issue?

Posted: **Mon Jun 29, 2020 2:26 am**

saucier wrote: ↑Mon Jun 29, 2020 1:04 am Any ideas of what the issue might be, or any other place I could look to diagnose this issue?

The issue could likely be insufficient power for the enclosure/drive.

You may need a powered USB hub or drive enclosure with external PSU.

Posted: **Mon Jun 29, 2020 2:35 am**

Thanks for your response. I have it attached to a blisster v2, which I have powered via a 2.4 amp power supply. I've tried connecting the blisster to a separate power supply than the rest of the MiSTer (since there is normally a small cable to connect the MiSTer to the blisster, and it still exhibits this issue.

Posted: **Wed Jul 01, 2020 7:27 pm**

USB Host on DE10-nano has many compatibility problems. It may have problems in specific configs. It may work through one hub but fail through another. Different USB port also may fix problem. Or may not work at all.
It's normal for DE10-nano.

Posted: **Thu Jul 02, 2020 12:34 am**

Thanks! Glad to hear that it isn't just me. It hasn't been a huge issue, but I'll play around with it to see if I can work out a more stable connection.

MiSTer FPGA Forum

USB attached disk is sporadically unmounted

USB attached disk is sporadically unmounted

Re: USB attached disk is sporadically unmounted

Re: USB attached disk is sporadically unmounted

Re: USB attached disk is sporadically unmounted

Re: USB attached disk is sporadically unmounted