Fusion Drive のデータの完全消去に関するメモ。GUI からデータの完全消去が出来ないので・・・。
- Mac を内蔵 Fusion Drive 以外から起動する
- とりあえずディスクの情報を得る
$ diskutil list /dev/disk0 (internal, physical): #: TYPE NAME SIZE IDENTIFIER 0: GUID_partition_scheme *121.3 GB disk0 1: EFI EFI 209.7 MB disk0s1 2: Apple_APFS Container disk2 121.1 GB disk0s2 /dev/disk1 (internal, physical): #: TYPE NAME SIZE IDENTIFIER 0: GUID_partition_scheme *1.0 TB disk1 1: EFI EFI 209.7 MB disk1s1 2: Apple_APFS Container disk2 1000.0 GB disk1s2 /dev/disk2 (synthesized): #: TYPE NAME SIZE IDENTIFIER 0: APFS Container Scheme - +1.1 TB disk2 Physical Stores disk1s2, disk0s2 1: APFS Volume Internal HD 954.4 KB disk2s1 - Internal HD としてマウントされている /dev/disk2 をアンマウントする。
$ diskutil unmountDisk disk2
- APFS コンテナの情報を得る
$ diskutil apfs list APFS Containers (1 found) | +-- Container disk2 ==================================================== APFS Container Reference: disk2 (Fusion) Size (Capacity Ceiling): 1121118199808 B (1.1 TB) Capacity In Use By Volumes: 8817790976 B (8.8 GB) (0.8% used) Capacity Not Allocated: 1112300408832 B (1.1 TB) (99.2% free) | +-< Physical Store disk1s2 | ----------------------------------------------------------- | APFS Physical Store Disk: disk1s2 (Secondary, Designated Aux Use) | Size: 999995129856 B (1000.0 GB) | +-< Physical Store disk0s2 | ----------------------------------------------------------- | APFS Physical Store Disk: disk0s2 (Main, "Faster" Disk Use) | Size: 121123069952 B (121.1 GB) | +-> Volume disk2s1 --------------------------------------------------- APFS Volume Disk (Role): disk2s1 (No specific role) Name: Internal HD (Case-insensitive) Mount Point: Not Mounted Capacity Consumed: 970752 B (970.8 KB) FileVault: No - disk2 が Fusion Drive なのでこれのコンテナを削除する
$ diskutil apfs deleteContainer disk2
※これを行うと、Fusion Drive が解除され、物理ディスク /dev/disk0 と /dev/disk1 となる。
- それぞれ Secure Erase を実行する。
$ diskutil secureErase 0 disk0 $ diskutil secureErase 0 disk1
※どちらも 0 消去。
- Fusion Drive を再構築する
$ diskutil resetFusion Internally-located hardware disk devices known to the currently-running macOS: Solid State (disk0) Rotational (disk1) Volumes exported by partitions or storage systems hosted on the above devices: disk0 will be used as the "main" ("faster") device disk1 will be used as the "secondary" ("larger") device WARNING: All of the above will be erased Do you want to continue? (Enter "Yes" to proceed to erase) Yes Force-unmounting all volumes on the chosen "main" ("faster") disk device Started on disk0 Error: -69886: Invalid request Ignoring the error during the above unmount; proceeding Force-unmounting all volumes on the chosen "secondary" ("larger") disk device Started on disk1 Error: -69886: Invalid request Ignoring the error during the above unmount; proceeding Creating a new partition map on the "main" ("faster") disk device Started on disk0 Unmounting disk Creating the partition map Waiting for partitions to activate Finished on disk0 Partition disk0s2 will be the "main" ("faster") APFS Physical Store Creating a new partition map on the "secondary" ("larger") disk device Started on disk1 Unmounting disk Creating the partition map Waiting for partitions to activate Finished on disk1 Partition disk1s2 will be the "secondary" ("larger") APFS Physical Store Creating an APFS Fusion Container importing two partitions Started on disk0s2 Creating a new empty APFS Container Unmounting Volumes Switching disk0s2 to APFS Switching disk1s2 to APFS Creating APFS Container FusionLC autodetect: regular Fusion Created new APFS Container disk8 Finished on disk0s2 The new APFS Container is disk8 Adding a logical APFS Volume to the APFS Container - macOS を再インストールする