I've came across a weird situation when building the Raid 10 on TS-1263u-RP for 2 Groups.
*All Hard disks are the same model and same specs regardless of their sizes.
Setup on TS-1263u-rp:
Group 1:
4x 8TB Seagate ironwolf (ST8000VN0022)
Raid 10 building speed 180-195 MB/s
Group 2:
6x 12TB Seagate Ironwolf (ST12000VN0008)
Raid 10 building speed: 100 Mb/s maximum
Still needs 80 hours to finish out of 100 Hours.
Group 1 Finished building the raid in about 24 hour, and the speed tests are as below (over ISCSI, 10GB ISO file)
Upload: 180 Mb/s
Download: 400-600MB
I'm very happy with the performance of Group 1. (Still IOPS to be tested)
Now the question, since the Raid building speed of the 6x 12TB Raid 10 pool is very slow (compared with Group 1), What should I expect as a result? Slower download/upload performance speeds then Group 1 or faster speeds. Since the 6x drives are being built as 3 Raid 1s and striped to create Raid 10.
Group 1 will be used in Exchange VM (OS + Logs)
Group 2 will be used for Exchange VM Databases (5 Databases, 800 GB each)
There are 2x1 TB (For SSD caching) and will be activated as needed only for the weaker performance IOPS raid group.
Any feedback will be highly appreciated.