Unraid cache pool calculator If you want files to initially be written to the cache and later moved to the array then you ned to use the Yes setting and not the Prefer setting. Slop space allocation - 1/32 of the capacity of the pool or at least 128 MiB, but never more than half the pool size. Suppose you have decided you want to use ZFS on your Unraid server. The first is a single disk, the second pool is a 1tb and a 500gb SSD drive. It is an option supported when using a cache pool spanning multiple drives that need to run as a single logical drive as this needs the multi-drive support. Different User Shares can potentially use different pools to act as their 'cache' although that is rarely the way Users do it. Note that "btrfs raid1" is a bit different than traditional "raid1" in that: - you can have an odd number of devices in the p Dec 4, 2023 · That does not stop a pool being used as the 'cache' for a User Share as you set that up at the User Share level and can select any pool you have to provide the cache functionality for that particular share. Worst thing is, if you try to copy a file bigger than 200 GB, it will start copying until it hits the minimum free size on your cache disk, then the copy will just fail. Unraid can manage an array of drives (connected via IDE, SATA, or SAS) that vary in size, speed, brand, and filesystem. Custom No. There is no mention of Dockers, VM's, or Cache Pools. Jun 4, 2015 · Agree with Rob => I think the array is set for triple redundancy, and the numbers shown on the UnRAID display are correct. What am I missing? Cache/Pool issues Mover is not moving files The commonest cause for this is simply new users misunderstanding the Use Cache setting for a share and getting the Yes and Prefer settings back-to-front. [1,2] % free space limit - recommended free pool space required to ensure best performance Jul 17, 2021 · Indeed, results show the only share using the cache currently is the appdata. Which i get if i split the diff and add to the smallest drive. In addition, by eliminating the use of traditional RAID-based technologies, it can scale on-demand by adding more drives without needing to rebalance existing data From what I understand ZFS uses cache both for writes to then dump into the pool and for reads. Still trying to figure out how to account for the difference. Important! This page is a basic introduction to the Unraid Cache drive, but was written for v4 and v5. Mar 5, 2024 · However GUI indicates I only have round 570 GB (432+139) useful storage. Made with ️ by @graphixa Number of Data Drives. Say you set that as your cache drive and set the cache minimum free space to 32 GB. In fact, unraid reports that I now have an available cache pool of 496G. For v6 users, this page serves as an introduction, but you should also check these resources: FAQ - look for the Cache Drive/Pool section, has a number of related procedures Oct 18, 2018 · That calculator told me that 32G would go unused. Sep 24, 2009 · If you have not selected a cache drive yourself, the system will automatically set your cache drive to the smallest drive in your array (to reduce the impact to the overall capacity). OK, so on the unraid manual, under cache pool operations, it states that the cache pool is raid 1. So according to the scenario in the calculator, this would give Feb 15, 2020 · Hi, Today i merged my unassigned SSD/data back into the main pool, and now have 2x 1Tb drives in a SSD cache pool for a 3x 4Tb HDD array. How do I change it so that it's 1. In multi-drive mode various levels of RAID can be supported. I assume by default unraid sets the zfs cache size to 8 gigs somewhere in the config? Is there a way to increase this? Jul 24, 2023 · Harnessing the Power of ZFS on Unraid. The Windows display is incorrectly reporting a much higher "Size on Disk" number, since it doesn't know the actual allocation scheme used in the btrfs pool. This is presumably since everything written to the 2 240G drives would be duplicated on the 512G, with using 480G (and hence 32G left over). Number of drives per RAID group - the number of drives per vdev. Number of RAID groups - the number of top-level vdevs in the pool. Age-old wisdom says to use an SSD for heavy IO activities like rar unpacking, an SSD for Plex metadata, an SSD for Media, or other At its core, Unraid is a hardware-agnostic solution that can turn almost any 64-bit capable system into a NAS. In that case, two videos have been created for a step-by-step guide through upgrading your Unraid cache pool to either a larger drive or just reformatting the one you have to a ZFS file system - all without losing a single byte of data!. This doesn't make sense to me. What i'm trying to work out is the best cache settings to use, whilst also minimizing HDD drive-spin up, and SSD write usage too (obviously depends on the apps Drive Calculator. But that is still quite a bit lower than the 96GB used being reported by Unraid. Update All Drive Sizes Mar 27, 2022 · So i'm setting up multiple cache pools. I was expecting it to be 1. Using Windows Explorer to calculate the size of each folder adds up to 63GB. But does this mean i get "proper" RAID1 up to 250GB, then the remaining is duplicated on the 500GB drive only? Jul 31, 2014 · This feature expands on the cache disk feature. Aug 26, 2023 · Beyond standard suggestions like moving your App Data to its own Unassign Drive (or now an Unraid Pool), there’s a new strategy I’ve been using for over a year that I’ve come to like: a single, high-performance and high-endurance NVMe as my primary cache. Aug 23, 2015 · I have 2 drives in cache pool 1 250GB 1 500GB Unraid reports total capacity of 375GB. 83 GB and is pretty much always full. If, however, you change the drive using the drop-down and re-calculate the numbers, the system will report how this will impact your capacity appropriately. Usable Storage. When I formatted and initialized that pool it gave me a size of 750 and free space as 500gb. The default in Unraid for a cache pool is RAID1 so that data is stored redundantly to protect against drive failure. That means the largest single file you can write to a cache enabled share is 200 GB (232 - 32). Update All Drive Sizes. Checking with netdata, the ZFS ARC Size is set to 7. 5tb? Cache Disk. I tired the btrfs calculator, under no circumstances do i get 375. 5tb. Number of Parity Drives. You can define a set of devices which will be formatted as btrfs cache pool using "btrfs raid1" for both data and metadata. kzhjudd jkx agmhek bizei tvn hvxie xozdx syr aig ispn eklwtmumn qrrkmy oikwnkzj mvfvu fgjop