Re-plugged drive not detected

[Pedro Catalão]

Hi, if I hot unplug one of the drives of the array, the volume state will change to degraded but when I plug it back, the state will not go back to online, that will only occur when I reboot. Am I doing something wrong?

thank you for the help.

 

[cyberjock]

Nope. That's normal. You shouldn't be hotplugging drives with FreeNAS. ;)

 

[Pedro Catalão]

Hey cyberjock, thanks for the quick answer.. but I thought FreeNAS supported hot plugging of drives :\

cheers,

 

[cyberjock]

Hey cyberjock, thanks for the quick answer.. but I thought FreeNAS supported hot plugging of drives :\

cheers,

It supports hardware that supports hotplugging and has drivers for FreeBSD that support hotplugging. But it turns out that very little hardware actually does that in FreeBSD. You can do hot-swapping without issues. But hotplugging.. not so much. As a general rule I don't recommend hot-anything because it seems that quite a bit of hardware that supports hot-anything really means "we support hot-something in Windows" but doesn't support it in FreeBSD.

As most of us will consider our data's safety to be paramount its not a big deal to do a shutdown for a disk replacement. It ensures that you don't pull the wrong drive or have some kind of voltage transient that causes other drives to trip offline. I always get a disk serial number so I can be 100% sure that the disk I have in my hand is the disk I want to replace. Some users that have had poor quality server hardware chassis have a voltage spike when you unplug/plug in a new hard drive to a given port and other drives can drop that share the power connector. Totally shouldn't happen and is just shoddy engineering that hardware does that, but some of it does.

 

[Pedro Catalão]

got it, thanks again cyberjock