HackDAW Posted September 9, 2019 Share Posted September 9, 2019 (edited) Dear all, I am new here (longtime reader, first time poster) and this great forum has helped me immensely in the past - succesfully building two Hacks for music production. My second DAW Hack (see signature) has recently been upgraded from Yosemite 10.10.5 to High Sierra and Mojave on a separate SSD. Everything is working as it should but HDD disk access times under HS and Mojave are very slow. Current Disk setup is: 512GB SSD APFS boot disk with partitions for HS and Mojave as well as a shared partition for content. 2TB HDD HFS+ Data Disk with three volumes: 1) Shared Storage (with symlink to ~/Downloads folder from HS and Mojave SSD). 2)+3) are CCC Clones/spares 4TB HDD HFS+ Time Machine Backup Issues: When booted into HS or Mojave the HDD's take very long to mount, particularly the 2TB (Shared Data) Disk Once mounted folders on 2TB Drive take a long time to populate - from two to 25s. Feels like I am browsing an FTP Server in 1998. The above issues do not happen when I boot into my old Yosemite drive which resides on a separate 250GB SSD. HDD access times are fast (enough), folders populate immediately. I do wonder whether this issue is related to A ) APFS in general or B ) whether it is down to how HS and Mojave (i.e. native APFS versions of macOS) handle disk access, to HFS+ volumes in particular. Having cloned my Mojave boot disk to a HFS+ partition on my old SSD to no avail makes me think it is down to the latter (B). Has anybody experienced simliar problems? I tried searching the forums without success. Googling only brings up generic results ("10 ways why your Mac might be running slow"). Edit: Turning off SATA Hot-Swap in BIOS seems to have fixed the problem. Edited September 10, 2019 by HackDAW Link to comment Share on other sites More sharing options...
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