On 06/10/2020 21:29, Graham Perrin wrote:
lsof finds no open file.
How else might I tell why the device is busy?
Mobile hard disk drive, USB.
The same problem this morning,
----
root@momh167-gjp4-8570p:~ # zpool export Transcend
cannot unmount '/Volumes/t500': umount failed
root@momh167-gjp4-8570p:~ # lsof /Volumes/t500/
lsof: WARNING: device cache mismatch: /dev/usb/0.5.2
lsof: WARNING: /root/.lsof_momh167-gjp4-8570p was updated.
root@momh167-gjp4-8570p:~ # lsof /Volumes/t500/
root@momh167-gjp4-8570p:~ # usbconfig -d 0.5 dump_all_desc
ugen0.5: <SMSC USB5534> at usbus0, cfg=0 md=HOST spd=SUPER (5.0Gbps)
pwr=SAVE (0mA)
bLength = 0x0012
bDescriptorType = 0x0001
bcdUSB = 0x0300
bDeviceClass = 0x0009 <HUB>
bDeviceSubClass = 0x0000
bDeviceProtocol = 0x0003
bMaxPacketSize0 = 0x0009
idVendor = 0x0424
idProduct = 0x5434
bcdDevice = 0x3082
iManufacturer = 0x0002 <SMSC>
iProduct = 0x0003 <USB5534>
iSerialNumber = 0x0001 <1239567>
bNumConfigurations = 0x0001
Configuration index 0
bLength = 0x0009
bDescriptorType = 0x0002
wTotalLength = 0x001f
bNumInterfaces = 0x0001
bConfigurationValue = 0x0001
iConfiguration = 0x0000 <no string>
bmAttributes = 0x00e0
bMaxPower = 0x0000
Interface 0
bLength = 0x0009
bDescriptorType = 0x0004
bInterfaceNumber = 0x0000
bAlternateSetting = 0x0000
bNumEndpoints = 0x0001
bInterfaceClass = 0x0009 <HUB>
bInterfaceSubClass = 0x0000
bInterfaceProtocol = 0x0000
iInterface = 0x0000 <no string>
Endpoint 0
bLength = 0x0007
bDescriptorType = 0x0005
bEndpointAddress = 0x0081 <IN>
bmAttributes = 0x0013 <INTERRUPT>
wMaxPacketSize = 0x0002
bInterval = 0x0008
bRefresh = 0x0000
bSynchAddress = 0x0000
Additional Descriptor
bLength = 0x06
bDescriptorType = 0x30
bDescriptorSubType = 0x00
RAW dump:
0x00 | 0x06, 0x30, 0x00, 0x00, 0x02, 0x00
root@momh167-gjp4-8570p:~ # zpool export Transcend
cannot unmount '/Volumes/t500': umount failed
root@momh167-gjp4-8570p:~ # umount /Volumes/t500
umount: unmount of /Volumes/t500 failed: Device busy
root@momh167-gjp4-8570p:~ # lsof /Volumes/t500/
root@momh167-gjp4-8570p:~ #
----
When this last occurred, I could export the pool after signing out from
KDE.
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