ZFS hanging and pool suspended with USB Hard Drives

Question

ZFS hanging and pool suspended with USB Hard Drives

beren12 opened this issue 5 years ago · comments

I had this happen on my MBP with a portable drive, and my dad's 10.11 machine with a 3.5" external USB. Here's a spindump. nothing could get the IO going, zpool online/export would hang forever.

spindump-dad.txt

Jorgen Lundman · Answer 1 · Thu Dec 12 2019 10:41:52 GMT+0800 (China Standard Time)

All the ZFS active threads are waiting in zio_wait() for IO to complete. It is as if the device stopped responding. Can you coax it into speaking again using zpool clear pool [dev] zpool online pool dev and zpool reopen pool ?

Does it show in diskutil list (when it is hung), can you dd read from it?

beren12 · Answer 2 · Thu Dec 12 2019 11:26:10 GMT+0800 (China Standard Time)

zpool clear and zpool online hang. Not sure about dd or diskutil list…

touching a file nor doing /bin/ls on the drive stopped the hang

beren12 · Answer 3 · Thu Dec 12 2019 11:28:41 GMT+0800 (China Standard Time)

This drive worked fine for the past year as hfs so pretty sure it's not hardware related.

Dan Guisinger · Answer 4 · Wed Jul 01 2020 11:30:56 GMT+0800 (China Standard Time)

Regarding @baren12 mentioning zpool clear hanging, zpool clear hangs for me with my TB3 disk array if the array lost power or if I accidentally unplug the cable from my MacBook Pro while the pool was still online. Using 10.15.5. During such an event, I also can't reboot MacOS without a hard reboot from the power button.