giacomoleopardo

Yes, but not more than 321 GB

A little update: I tried with my pc RAM (32 GB DDR4 2x 16GB) installed, but the result is the same. I guess that's not a RAM issue

Hello everybody. Maybe I'm missing something, here, but I can't figure this out. My system: - DSM version DSM 6.2.3-25426 - Loader version and model: JUN'S LOADER v1.04b - DS918+ - Using custom extra.lzma: IG-88's extra and extra2 - Installation type: BAREMETAL - ASRock Fatal1ty Z170 Gaming-ITX/ac, Intel Pentium G4400 SkyLake, 2x4 GB DDR4 RAM, Raid 5 for testing with: - SSD Intel 120 GB - SSD Crucial 120 GB - HDD Toshiba 300 GB - HDD Hitachi 240 GB - Cache: - READ and WRITE 2x 1 TB SATA SSD Crucial Here's the deal. Since Synology declares here: https://blog.synology.com/xmas-wishlist-optimizing-your-nas-with-ssd-cache "Apart from SSD endurance, you should also consider the memory requirements of SSD caching. As an SSD cache requires a certain amount of system memory depending on the cache size, you may have to upgrade your memory if you want to mount a larger SSD cache. To maintain system stability, only 1/4 of the pre-installed system memory is allocated for SSD caching. Since a 1GB SSD takes up approximately 416KB system memory (including expandable memory), a 2 X 128GB SSD read-only cache (total 256GB) requires at least 104MB memory, while a 2 X 128GB SSD read-write cache (total 128GB) consumes 52MB memory. It should be noted that a lack of memory will, therefore, limit the SSD cache size." I can't figure out why when I create my cache raid 1 with the two 1TB SSDs it allows me to gain 321 GB instead of 900/1000 GB. 1000 GB cache would require 416 MB of my RAM, which is far less than 2 GB (a quarter of my 8 GB). Here's a screenshot. Thanks in advance for any help. G.

Here I am. New to everything this site is about. I'm eager to learn. This is great already!