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From time to time, they try to gain storage space with small disk capacities - but so that the number of disks is larger.
For example, 22 disk by 8TB in RAID 6 instead of 10 to 20TB in RAID 6 – there and there the usable capacity of the array is 160TB.
Perhaps this is fueled by memories from the days when productivity random access on HDD arrays reached the number of spindles.
Now HDD used exclusively for streaming data. There is no point in filling the storage body with small capacities.
About money :
- 10 20TB drives cost much less than 22 8TB drives
- The design solution for 22 (24) disks is more expensive than the platform for 10 (12) HDD – 4U vs. 2U
- 22 drives require a more powerful power supply and consume twice as much electricity.
- Cooling is also more complicated and expensive
On the feasibility :
- Typical linear read-write speed from surfaces HDD – 150-250MB/s
- Typically, data comes to the storage server from the network, usually over Gigabit Ethernet. Flow from one (!) disk is already filling up the entire lane. Theoretical flow from 10 disks will run into the network limitation of 10GB. So why that amount? HDD?
- And there are also restrictions RAID controllers, buses PCIe
- By the way, linear velocity read/write growth in larger disks is better. Compare
20TB
8TB
So, there's no point in cutting it small. You need to gain volume - take large containers. HDD .
Server Solutions sells Dell PowerEdge R760 and Dell PowerEdge R760xs servers throughout Ukraine, our clients include small, medium and large businesses. If you or your company needs advice and the purchase of quality server equipment, then you should contact us.