April 3, 20251 yr Hi at all, I just added 4 empty 10TB drives and every drive as almost 200GB reserved (=being used, although there is no single file written to it, yet). How can I reduce this behaviour? I almost lost a full TeryByte without even touching the xfs array. Best wishes!
April 3, 20251 yr Community Expert If that's really an issue for you, I would recommend using a different filesystem, you can slightly reduce the overhead with xfs, but to remove it completely, you would need to use an old deprecated format, see here for more info: https://forums.unraid.net/topic/183616-disable-xfs-reflink-to-regain-disk-space/#findComment-1508134
April 3, 20251 yr Author what is the best file system in that case? I cannot waste space on my drives. It is a simple gaming-ISO dumpster server that serves as my steam-library backup. so it is a one time written to and from there only read NAS. I am going to add a parity drive later on after the drives have been filled. and 4x 200GB is a lot of space wasted for nothing.
April 3, 20251 yr Community Expert If not xfs, I would use btrfs, since zfs currently has a known write performance issue when used with the array only, also zfs, has around 4% overhead.
April 3, 20251 yr Community Expert There isn't any, but you should note filled it completely, since it's a COW filesystem, try always leaving a few GBs free.
April 3, 20251 yr Author btrfs left me with almost 100% usable space, but after copying two files with a total of 25GB to it, it tells me it used 50GB on the drive?!? Why is that? Edited April 3, 20251 yr by naddel81
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