pipsen Posted December 23, 2022 Share #1 Posted December 23, 2022 (edited) Hi, currently I have DSM 7.1 installed via ARPL on a BAREMETAL HP ProDesk 600 G4 (Intel I5-8500, 16GB RAM). My Harddisk setup is: 256 GB SATA SSD: Volume 1 for packages and docker container's appdata 8 TB SATA HDD: Volume 2 for file storage Currently I can read and write and with 113 MB/sec via Gigabit Ethernet continously on both volumes. Problem: Everytime a little risky, when DSM updates appear, whether bootloader and installation survives. Idea: Using Proxmox Hypervisor to have snapshot capabilities before each update - just in case. I have now a few topics to discuss, which decisions make sense: Host file system What would you recommend? ZFS? ext4? These two seem to be most popular. https://lowendspirit.com/discussion/2786/poll-which-type-of-filesystem-you-prefer-on-proxmox-host-node Any suggestions in terms of Xpenology? Passthrough vs. virtual disks I have read here in some threads, that passing through harddisks would be best idea in terms of best performance. Question: I assume, that I will lose the main benefit with my snapshots, right? I mean, the bootloader disk can be snap-shot, but I have seen, that on each used HDD and SSD, the DSM installs two partitions with OS. II case of a bricked DSM after update, I restore an old snapshot before update, the bootloader is downgraded, but the passthrough HDD is unaffected and I have a version mismatch => DSM will automatically upgrade the bootloader to have same version => bricked again. Any Ideas, how to get bet the benefits of both worlds? Passthrough of NVMe cache I have an unused M.2 slot, where I could integrate a NVMe SSD as Cache device. This can be passed-through as well, as I have seen. Question: If I decided to have SSD and HDD as virtual disks (for snapshots), is it still possible to passthrough an NVMe SSD to attach als Cache-SSD? Virtual Disk parameters I case I decide for virtual disks: How to configure the parameters to have maximum write performance without running into write cache problems: VirtIO SCSI Bus: SATA (some say SCSI?) Cache: none (some say write back?) DSM write cache setting: activated? Model VirtIO (some say others?) SSD emulation for SSD Disk on? Problem: With my test installation witht he parameters above, I have the effect, when I copy a 20GB file, I have 113 MB/sec for the first seconds until about 5 GB, and then the write speed decreases to around 70 MB/sec. With cache settings "Write back", the effect was even worse. Encryption I would like to have my whole personal data encrypted. What would you recommend (in terms of performance): Encryption on Host Level? If yes: Whats the best idea? Encryption on DSM Level: Enrypt each Btrfs share? Synology Model For my setup here, I assume DS-920+ should be the best one, correct? Anything else? Anything else what you have in mind, which is very important to have maximum performance? Thank you! Thank you very much in advance for you tips and input and the discussion! Edited December 23, 2022 by pipsen Quote Link to comment Share on other sites More sharing options...
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