diff --git a/docs/nixos_build_spec.md b/docs/nixos_build_spec.md
index 1838187..c0f24d9 100644
--- a/docs/nixos_build_spec.md
+++ b/docs/nixos_build_spec.md
@@ -41,8 +41,8 @@ WIPE + install NixOS here:
   - NOTE: device name may change; config always uses /dev/disk/by-uuid.
 - XPSystemDrive (ext4) UUID=82c994f1-9adb-49e4-ba1e-5b6e5ccbd49b (~149GiB/160GB) (KEEP)
   - Model: HTS541616J9SA00 (Hitachi)
-  - NOTE: device name may appear as /dev/sdb or other /dev/sdX depending on boot/USB order; identify by UUID/label/model.
-  - Observed: `fdisk` currently reports the 160GB device as /dev/sdb (do not rely on this).
+  - NOTE: device name may appear as /dev/sdX depending on boot/USB order; identify by UUID/label/model.
+  - Observed in hardware scan: `/dev/sde` (do not rely on this).
 
 Bootloader:
 - systemd-boot, using the existing EFI partition (/dev/nvme0n1p1)