Hello everyone,
I was previously using a mirrored pool of 2x512G SSDs for my app data, and a striped pool of mirrors of 2x10T, 2x18T,2x18T,2x22T HDDs for main storage. Recently, I've added 7.68Tx2 U.2 SSDs and moved app data storage there. Now the 2x512G SSDs are empty. What is the best way to use these SSDs? They are small and not so reliable, so I was planning to use them as L2ARCs but I read people saying it hits the RAM very hard and recommends against using drives over 256G for L2ARC. As for SLOG, I am a little worried about data loss. The 512G SSDs are on the same carrier card (pcie expansion). If the carrier card fails there there will be some data loss regardless to being mirrored or not. Here is my detailed setup:
System: TrueNAS-SCALE-22.12.3.3
CPU: AMD 5750GE
RAM: 128G(32x4) 3200MHz ECC
Pools:
-Main storage: 2x10T, 2x18T,2x18T,2x22T stripped mirror HDDs, Total capacity 68T
-App storage: 2x7.68T U.2 SSDs (will add another mirror to expand total capacity further)
-Boot: 2x256G mirrored M.2 nvme SSD
Free Disks: 2x512G M.2 nvme SSD
NICs: 1G built in, 10G pcie expansion
Power supply: 2x500W platinum(One for MB+Half of the drives, the other one for the other half of the drives) with UPS
Use cases: Home media, BT, nextcloud, backups
Any suggestion is appreciated, thank you!
I was previously using a mirrored pool of 2x512G SSDs for my app data, and a striped pool of mirrors of 2x10T, 2x18T,2x18T,2x22T HDDs for main storage. Recently, I've added 7.68Tx2 U.2 SSDs and moved app data storage there. Now the 2x512G SSDs are empty. What is the best way to use these SSDs? They are small and not so reliable, so I was planning to use them as L2ARCs but I read people saying it hits the RAM very hard and recommends against using drives over 256G for L2ARC. As for SLOG, I am a little worried about data loss. The 512G SSDs are on the same carrier card (pcie expansion). If the carrier card fails there there will be some data loss regardless to being mirrored or not. Here is my detailed setup:
System: TrueNAS-SCALE-22.12.3.3
CPU: AMD 5750GE
RAM: 128G(32x4) 3200MHz ECC
Pools:
-Main storage: 2x10T, 2x18T,2x18T,2x22T stripped mirror HDDs, Total capacity 68T
-App storage: 2x7.68T U.2 SSDs (will add another mirror to expand total capacity further)
-Boot: 2x256G mirrored M.2 nvme SSD
Free Disks: 2x512G M.2 nvme SSD
NICs: 1G built in, 10G pcie expansion
Power supply: 2x500W platinum(One for MB+Half of the drives, the other one for the other half of the drives) with UPS
Use cases: Home media, BT, nextcloud, backups
Any suggestion is appreciated, thank you!