Hi,
I have 88 discs and I want to configure them as follows:
11 discs (8+3) in raidz3 (8 raidz3)
4 of raidz3 in a stripe for big size (2 stripes)
Until here it's possible and looks like
tank ONLINE 0 0 0
raidz3-0 ONLINE 0 0 0
gptid/fec5265c-2f9d-11ed-9b1f-002590ca45ba ONLINE 0 0 0
gptid/ff283a78-2f9d-11ed-9b1f-002590ca45ba ONLINE 0 0 0
gptid/ffad2450-2f9d-11ed-9b1f-002590ca45ba ONLINE 0 0 0
....
raidz3-1 ONLINE 0 0 0
gptid/ffd080cf-2f9d-11ed-9b1f-002590ca45ba ONLINE 0 0 0
gptid/ffcdd56f-2f9d-11ed-9b1f-002590ca45ba ONLINE 0 0 0
....
raidz3-2
....
Now my question: is it possible to mirror those two stripes? In some other posts on this board I read that nesting pools is a very bad idea and this is my opinion, too.
So a) adding some pools is not an option and b) the zpool create command must handle a three-tier-combination-creation which I could not achieve nor google this ;-).
Another possible way would be to mirror seperate discs and combine them to raidz3 and stripe them.
But when I want to
zpool create tank raidz3 mirror disc1 disc2 mirror d3 d4 mirror d5 d6 mirror d7 d8 ... raidz3 mirror d23 d24...
it tells me that raidz3 requires at least 4 devices.
Is it possible in a supported way?
It's not so important but for your understanding why I want it that way: these 88 HDDs are located in two different JBODs which are connected over ATTO bridges and FC to two servers in two seperate locations. I know replication and already use it with some other storages but in this case mirroring would be of much more benefit because both servers see all HDDs and if one server fails or must be updated, the other server can import the pool and continue serving shares.
Thank you!
I have 88 discs and I want to configure them as follows:
11 discs (8+3) in raidz3 (8 raidz3)
4 of raidz3 in a stripe for big size (2 stripes)
Until here it's possible and looks like
tank ONLINE 0 0 0
raidz3-0 ONLINE 0 0 0
gptid/fec5265c-2f9d-11ed-9b1f-002590ca45ba ONLINE 0 0 0
gptid/ff283a78-2f9d-11ed-9b1f-002590ca45ba ONLINE 0 0 0
gptid/ffad2450-2f9d-11ed-9b1f-002590ca45ba ONLINE 0 0 0
....
raidz3-1 ONLINE 0 0 0
gptid/ffd080cf-2f9d-11ed-9b1f-002590ca45ba ONLINE 0 0 0
gptid/ffcdd56f-2f9d-11ed-9b1f-002590ca45ba ONLINE 0 0 0
....
raidz3-2
....
Now my question: is it possible to mirror those two stripes? In some other posts on this board I read that nesting pools is a very bad idea and this is my opinion, too.
So a) adding some pools is not an option and b) the zpool create command must handle a three-tier-combination-creation which I could not achieve nor google this ;-).
Another possible way would be to mirror seperate discs and combine them to raidz3 and stripe them.
But when I want to
zpool create tank raidz3 mirror disc1 disc2 mirror d3 d4 mirror d5 d6 mirror d7 d8 ... raidz3 mirror d23 d24...
it tells me that raidz3 requires at least 4 devices.
Is it possible in a supported way?
It's not so important but for your understanding why I want it that way: these 88 HDDs are located in two different JBODs which are connected over ATTO bridges and FC to two servers in two seperate locations. I know replication and already use it with some other storages but in this case mirroring would be of much more benefit because both servers see all HDDs and if one server fails or must be updated, the other server can import the pool and continue serving shares.
Thank you!