Hi, I've been using ZFS on my home server for 2 days, and spending a lot of time on it. Here is my conf : - AMD Sempron 140 - MB MSI K9N6PGM2-V - 3GB DDR2 PC2-6400 - 2 x 1TB Seagate SATA2 - 1 x 80GB Maxtor IDE ATA-133 I installed FreeBSD 8.0p3 (64 bits) on the 80GB disk, and I mounted the 2 SATA disks in ZFS RAID1 with the following command : Code:zpool create mirror share ad4 ad6 Then, I benchmarked my server, by copying some big files, and then a lot of small files. The performance was really bad, in the two cases ! I read a lot of threads about that, and I tried several configurations, by modifying /boot/loader.conf, and the "best" performance I could get is with these parameters : Code: vfs.zfs.prefetch_disable=1 vm.kmem_size="1536M" vfs.zfs.arc_min="1024M" vfs.zfs.arc_max="1536M" vfs.zfs.vdev.min_pending=2 vfs.zfs.vdev.max_pending=8 vfs.zfs.txg.timeout=5 When I copy a big file, a movie for instance, I got this speed : 27MB/s, and 18MB/s for a lot of small files. Maybe my parameters are not so good, but I don't find anything which could help me configure it better, or maybe ZFS is not for me, maybe I should switch back to UFS2, or Linux - EXT4 which was working well. Someone has any idea ?