We have an alls flash VSAN cluster consisting of 7 hosts and would like to expand the storage capacity.
Current config per server is:
- 1 x 800GB Intel P3600 NVMe drive
- 2 x 1.2TB Intel S3610 2,5" SSD
Since the S3610 is not for sale anymore, the suggestion is to add one or two (NVMe/SSD ratio still seems ok then) D3-S4610 drives, also from Intel. Those drives are available in 960TB or 1.9TB and that raised the question. Can I add either type to my hosts and what is the capacity impact?
If I add the 960GB disks, will vsan still work and balance all the data over all the SSD's?
If I add the 1.9TB variant, will the capacity grow by 1.2TB per disk (because I already have 1.2TB SSD's) or will it use the complete 1.9TB?
Hello Pieter,
"Can I add either type to my hosts and what is the capacity impact?"
You can and it will increase vsanDatastore capacity by that amount.
"If I add the 960GB disks, will vsan still work and balance all the data over all the SSD's?"
Yes, you can start rebalance task from vSAN Health UI or RVC - only data on disks over 80% used gets moved automatically otherwise.
"If I add the 1.9TB variant, will the capacity grow by 1.2TB per disk (because I already have 1.2TB SSD's) or will it use the complete 1.9TB?"
It will use the complete amount. Note it is advised to use the same size capacity-tier devices if using deduplication.
Bob
Hello Pieter,
"Can I add either type to my hosts and what is the capacity impact?"
You can and it will increase vsanDatastore capacity by that amount.
"If I add the 960GB disks, will vsan still work and balance all the data over all the SSD's?"
Yes, you can start rebalance task from vSAN Health UI or RVC - only data on disks over 80% used gets moved automatically otherwise.
"If I add the 1.9TB variant, will the capacity grow by 1.2TB per disk (because I already have 1.2TB SSD's) or will it use the complete 1.9TB?"
It will use the complete amount. Note it is advised to use the same size capacity-tier devices if using deduplication.
Bob
Very clear, thanks for your time, Bob.