diff --git a/hosts/skydick/datapool.nix b/hosts/skydick/datapool.nix
index 1bc7484..33ddaaf 100644
--- a/hosts/skydick/datapool.nix
+++ b/hosts/skydick/datapool.nix
@@ -68,6 +68,7 @@
 #   dick/users/ldx/files            /srv/users/ldx/files     128K     zstd      personal files
 #   dick/users/ldx/bt-state         /srv/users/ldx/bt-state  16K      zstd      .torrent, resume, *arr DBs
 #   dick/users/ldx/vm               /srv/users/ldx/vm        64K      zstd      VM filesystem root / parent for zvol children
+#   dick/users/ldx/timemachine      /srv/users/ldx/timemachine 64K    zstd      macOS Time Machine sparsebundle backups
 #
 #   SYSTEM
 #   dick/system                     (canmount=off)                              namespace root
@@ -99,9 +100,10 @@
 #   zfs create -o recordsize=128K -o mountpoint=/srv/users/ldx/files            dick/users/ldx/files
 #   zfs create -o recordsize=16K  -o mountpoint=/srv/users/ldx/bt-state         dick/users/ldx/bt-state
 #   zfs create -o recordsize=64K  -o mountpoint=/srv/users/ldx/vm              dick/users/ldx/vm
+#   zfs create -o recordsize=64K  -o compression=zstd -o mountpoint=/srv/users/ldx/timemachine dick/users/ldx/timemachine
 #   mkdir -p /srv/users/ldx/vm/files
 #   chown ldx:users /srv/users/ldx && chmod 0700 /srv/users/ldx
-#   for d in files bt-state vm vm/files; do chown ldx:users /srv/users/ldx/$d && chmod 0750 /srv/users/ldx/$d; done
+#   for d in files bt-state vm vm/files timemachine; do chown ldx:users /srv/users/ldx/$d && chmod 0750 /srv/users/ldx/$d; done
 #   # File-backed VM images live under /srv/users/ldx/vm/files.
 #   # Block LUNs are zvol children of dick/users/ldx/vm/<name>.
 #
@@ -204,6 +206,7 @@
     "d /srv/users/ldx/bt-state 0750 ldx users -"
     "d /srv/users/ldx/vm 0750 ldx users -"
     "d /srv/users/ldx/vm/files 0750 ldx users -"
+    "d /srv/users/ldx/timemachine 0750 ldx users -"
     "d /srv/users/ye-lw21 0700 ye-lw21 users -"
     "d /srv/users/ye-lw21/files 0750 ye-lw21 users -"
     "d /srv/users/ye-lw21/bt-state 0750 ye-lw21 users -"