zpool unavail, cant import 6TB Data loss

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zambanini

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ok, and now nobody is allowed to use the term esx anymore :)
 

david kennedy

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A bunch of engineers who've been repeatedly bitten by leniency over the years, at that.

Interesting food for thought...

http://www.freenas.org/whats-new/20...ign-part-iii-pools-performance-and-cache.html

"ZFS storage pools are comprised of vdevs which are striped together. vdevs can be single disks, N-way mirrors, RAIDZ (Similar to RAID5), RAIDZ2 (Similar to RAID6), or RAIDZ3 (there is no hardware RAID analog to this, but it’s a triple parity stripe essentially)."

.... Wonder where some of this confusion over "Raidz vs raid5" can come from when it is even posted on the hardware design guides from iXsystems....
 

danb35

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"ZFS storage pools are comprised of vdevs which are striped together. vdevs can be single disks, N-way mirrors, RAIDZ (Similar to RAID5), RAIDZ2 (Similar to RAID6), or RAIDZ3 (there is no hardware RAID analog to this, but it’s a triple parity stripe essentially)."
I must have missed the post in this thread where someone denied that RAIDZ1 was similar to RAID5, or that RAIDZ2 was similar to RAID6. Can you point me to it?
 

jgreco

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The whole problem is that they are indeed conceptually similar, but definitely not equivalent and definitely not interchangeable.

If this were an automotive forum, it'd be like the difference between diesel and unleaded. Yes, they're both liquid fuels, commonly used in automobiles. But at a technical level they're very different things, and you cannot put unleaded in a diesel engine and expect to have a good ending. And we see people doing that, often enough, that we want to be clear on what is actually going on.
 
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