If your Xsan Metadata Controller restarts unexpectedly

If you upgraded to macOS Mojave and your Xsan Metadata Controller restarts due to a kernel panic, learn what to do.

After you upgrade to macOS Mojave, your Xsan Metadata Controller (MDC) might unexpectedly restart due to a kernel panic with a message similar to this:

panic(cpu 6 caller 0xffffff7f911101b6): "CVFS ASSERTION FAILED: vnode_hasdirtyblks(vp) == 0 line 1220 file md_rwbuf.c”@/BuildRoot/Library/Caches/com.apple.xbs/Sources/XsanFS/XsanFS-613.200.4/snfs/client/vfs/nomad/md_debuglog.c:305

Update macOS

To fix this issue, update to macOS 10.14.4.

Mount your Xsan volume

If you previously unmounted your Xsan volume, you can mount it with the following command:

sudo xsanctl mount VolumeName --rw

Published Date: March 25, 2019