Synology 923+ cache

[Enquiries]

Hello. I’m looking for a recommendation for my ds923 for read-write cache.

I ran the cache advisor in dsm and it said 640gb so I’m assuming 1tb for extra overhead.

I was looking at the WD black, then I saw WD makes a nas rated nvme….. so maybe that’s a better fit?

What is your recommendation?

Thanks again.

[ed]

Thank you for reaching out! Based on your DS923+ and the 640GB cache advisor recommendation, a 1TB NVMe drive would indeed provide sufficient overhead for read-write caching. Here’s my recommendation:

NAS-Specific NVMe Drives
Since this cache will be running 24/7 and under heavy workloads, using a NAS-rated NVMe SSD is a better fit. These drives are optimized for sustained performance and durability in NAS environments. I suggest:

WD Red SN700 NVMe SSD (1TB)

Designed specifically for NAS use.
Endurance: 2000TBW (Terabytes Written), ideal for consistent cache workloads.
Lower power consumption and optimized for long-term use.
Seagate IronWolf 525 (1TB)

Another NAS-rated NVMe option with strong endurance and reliability.
High durability with similar performance to the WD Red SN700.
Why Avoid WD Black?
While the WD Black is a great drive for gaming and general PC use, it’s not designed for the continuous write operations and higher durability needs of NAS systems. A NAS-rated NVMe like the WD Red SN700 or Seagate IronWolf 525 will better handle the demands of a Synology read-write cache.