molay
Dabbler
- Joined
- Dec 6, 2022
- Messages
- 22
My DELL R730XD only has 12x 3.5" and 2x 2.5" SATA/SAS bays, and NVMe conversion cards (two NVMe SSDs) can only be installed on the RISER1 card (3x half height PCIe 3.0x8).How many drives (and of what kind) can a/this specific DELL R730XD fit?
The reason for choosing HDD is that it is large and cheap.
I also know that SSD is fast, but SATA/SAS SSD is very expensive, and the cost performance is much lower than that of NVMe SSD.
The PCIe slots are limited, and I can install up to 3x2 NVMe SSDs in the RISER1 card, but it will generate a huge amount of heat which may cause some issues.
So currently I still tend to use HDD devices.
I read the threads of the moderators and found that Mirror does bring many advantages, such as relatively less impact from disk fragmentation, much shorter re-silvering time than RAIDZn, higher IOPS, and more suitable for block storage.
My key question is: Is it possible to completely use Mirror to replace RAIDZn in daily use?
If yes, for SOHO, on the premise of ensuring the security of the data pool, is it more recommended to use 2-way Mirror or 3-way Mirror?
For projects with a large number of small files, If the access speed has reached the limit under a reasonable configuration, I can accept it.
In the future If I can find an inexpensive hardware solution that can accommodate multiple M.2/U.2 SSDs at the same time, with good cooling, I may create a separate TrueNAS server for these projects.
Then I could really fly.
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