The whole pool fails and you lose all the data on that pool! Since the resilvering process is a lot quicker than RAID-Z, the likelihood of the second drive dying when you replace is not as high. But if you had both drives fried at the same time with lightning, for instance, you would lose it all. If you want to be more resistant to drive failures, you could do 3 way mirrors but then you lose even more usable space. I've also thought about hot spares-- if you had an extra drive or 2 dedicated to hot spares, they could automatically be used when drives fail. Of course, redundancy is never a replacement for backups. I found this information useful for when using mirrors in ZFS including some detailed rationale for using it: jrs-s.net/2015/02/06/zfs-you-should-use-mirror-vdevs-not-raidz/
Yes it’s fast. I did it in real time without cutting the clip to shorten the video time. I figure the next time I will upgrade 2 existing drives like you said because I have 2 older drives that will need replaced since they are both 5-6 years old.
Haha. Yeah the rack does sway slightly, but I have checked the tightness from time to time. It’s a cheaper, lighter weight rack but I’m not worried about it falling apart especially since I don’t have heavy enterprise grade equipment.
Growing fast bud! Good job !!
Thanks! Close to 1k now!
What happens to your ZFS pool and data if two HDDs on the same vdev fail? Thanks
The whole pool fails and you lose all the data on that pool! Since the resilvering process is a lot quicker than RAID-Z, the likelihood of the second drive dying when you replace is not as high. But if you had both drives fried at the same time with lightning, for instance, you would lose it all. If you want to be more resistant to drive failures, you could do 3 way mirrors but then you lose even more usable space. I've also thought about hot spares-- if you had an extra drive or 2 dedicated to hot spares, they could automatically be used when drives fail. Of course, redundancy is never a replacement for backups. I found this information useful for when using mirrors in ZFS including some detailed rationale for using it: jrs-s.net/2015/02/06/zfs-you-should-use-mirror-vdevs-not-raidz/
@@homenetworkguy Thank you. I'll read it through
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Thanks!
Super fast. Now next year you can swap out 2 of the smaller drivers for higher capacity so you can expand your pool that way.
Yes it’s fast. I did it in real time without cutting the clip to shorten the video time. I figure the next time I will upgrade 2 existing drives like you said because I have 2 older drives that will need replaced since they are both 5-6 years old.
My mild anxiety watching the rack sway when the disks were inserted 😂
Haha. Yeah the rack does sway slightly, but I have checked the tightness from time to time. It’s a cheaper, lighter weight rack but I’m not worried about it falling apart especially since I don’t have heavy enterprise grade equipment.