Enclosure Management Integration

[behlendorf]

When ZFS fails a drive we need to be able to automatically do some minimal enclosure management. Luckily modern kernels provide a ses and enclosure module here which we may be able to leverage. Minimally in this case we want to set the fault led for this device in the enclosure. This could probably be done in kernel but that assumes that these modules provide a reasonable API. A simpler and perhaps more flexible solution would be to have zeventd set the fault led through the standard /sys/ interface. Regardless this needs to be thought through.

echo 1 >/sys/class/enclosure/6:0:9:0/000/fault

[behlendorf]

It was determined the best solution to the issue it to use sg3utils and bypass the ses module. It has been observed to drastically increase module load time for complicated configurations and thus may be blacklisted. We should not depend on it being available.

[FransUrbo]

@behlendorf With ZED now a reality, is this still an issue?

[behlendorf]

There's still a legitimate issue here. I've opened #2375 to clearly the required features now that we have the ZED. I'll close this one out.