Dear Zygo,
Thank you for this fantastic message. I hope you -- and the rest of the
list -- doesn't mind my jumping in mid-message...
On 17/01/2021 19:55, Zygo Blaxell wrote:
You can use a NVME device as a dm-cache or bcache device--the low-latency
interface is ideal for caching use cases, if you have a suitably fast
and robust SSD.
I have about 4 enterprise grade HGST SLC 100 GB and SLC 200 GB SAS
SSD's. I want to use these as some kind of cache or fast tier for a NAS
I am building.
**It has been suggested to me that I should use these SLC SAS drives
with dm-cache, by pairing one of each of four SSD's with a corresponding
high capacity NAS drive.**
This is for a home NAS so quietness is the major concern. Putting the
NAS in our living room is the only practical option _at this point in
time_ for various reasons.
This is going to be a "pure NAS" and the chassis will be roomy. For
example, I already have both the following chassis and I have yet to
choose one or the other:
- Supermicro SC 732D4F-903B (
https://www.supermicro.com/en/products/chassis/tower/732/SC732D4F-903B )
- Fractal Define XL R2 (
https://www.fractal-design.com/products/cases/define/define-xl-r2/black-pearl/
)
I think WD Red or Seagate Ironwolf drives would be best option as they
run at 5400 RPM and keep vibration lower. 4x 8-14 TB HDD's in mirrored
pairs (obvioulsy taken the dm-cache pair also into account).
Note to self: Investigate HDD mounting kits to absorb mechanical
vibration. Recommendations are welcome!
Any other suggestions would be greatly welcome!!
Andrew
