SubnetMask
Contributor
- Joined
- Jul 27, 2017
- Messages
- 129
I've been searching around, and maybe my 'search-fu' is weak, while the number '10' seems to ring a bell, I haven't found anything that gives a 'solid' disk per pool limit.
Currently, I have an eight disk RAIDZ2 pool as my 'main' datastore - this datastore is home to two VMDK files attached to the same VM - one is for general data and the other is for media (movies, music, etc). As such, I don't need to be able to push 10,000 IOPS or 1.2GB/s from it (wouldn't complain if I could though) - capacity and reliability are most important for this particular pool. My pool that VMs boot off is a 10 disk stripe/mirror.
That being said, I'm in the process of migrating this pool to a 10 disk RAIDZ2 by way of migrating the VMDKs off to another pool and once empty, deleting and re-creating it as a larger pool, since we can't do live pool size migrations of this nature (Although I just read it's on the horizon....... somewhere... out there). But while I'm waiting for the data to be moved off, I've been thinking about making it a Z3 instead of a Z2 (Again, size and reliability are the most important). But I don't want to do this if 10 is the limit - a 10 disk Z2 and 11 disk Z3 will have roughly the same capacity and the 10 disk Z2 (or 11 disk Z3) is where I want to be in terms of capacity. Is there any reason I couldn't do an 11 disk RAIDZ3 for this pool? If it matters with regards to the pool size, the FreeNAS 'Controller' is currently a Poweredge R620 with two E5-2640's, 96GB RAM and two SAS2 LSI HBAs, and based on testing so far and some possible further testing, will almost certainly be migrating over to a FC630 with a single E5-2699v3, 256GB RAM and two LSI 9300 SAS3 HBAs.
Currently, I have an eight disk RAIDZ2 pool as my 'main' datastore - this datastore is home to two VMDK files attached to the same VM - one is for general data and the other is for media (movies, music, etc). As such, I don't need to be able to push 10,000 IOPS or 1.2GB/s from it (wouldn't complain if I could though) - capacity and reliability are most important for this particular pool. My pool that VMs boot off is a 10 disk stripe/mirror.
That being said, I'm in the process of migrating this pool to a 10 disk RAIDZ2 by way of migrating the VMDKs off to another pool and once empty, deleting and re-creating it as a larger pool, since we can't do live pool size migrations of this nature (Although I just read it's on the horizon....... somewhere... out there). But while I'm waiting for the data to be moved off, I've been thinking about making it a Z3 instead of a Z2 (Again, size and reliability are the most important). But I don't want to do this if 10 is the limit - a 10 disk Z2 and 11 disk Z3 will have roughly the same capacity and the 10 disk Z2 (or 11 disk Z3) is where I want to be in terms of capacity. Is there any reason I couldn't do an 11 disk RAIDZ3 for this pool? If it matters with regards to the pool size, the FreeNAS 'Controller' is currently a Poweredge R620 with two E5-2640's, 96GB RAM and two SAS2 LSI HBAs, and based on testing so far and some possible further testing, will almost certainly be migrating over to a FC630 with a single E5-2699v3, 256GB RAM and two LSI 9300 SAS3 HBAs.
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