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@yagihiro
Created March 19, 2018 05:09
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Create ramdisk on mac os high sierra
~ hiroki.yagita(HirokinoMacBook-Pro) ✅
% hdiutil attach -nomount ram://2097152                                                                                                                                                                                                                       3 19 月 14:01 JST
/dev/disk2
~ hiroki.yagita(HirokinoMacBook-Pro) ✅
% diskutil partitionDisk /dev/disk2 1 apfs test 1G                                                                                                                                                                                                            3 19 月 14:02 JST
Started partitioning on disk2
Unmounting disk
Creating the partition map
Waiting for partitions to activate
Formatting disk2s1 as APFS with name test
Mounting disk
Finished partitioning on disk2
/dev/disk2 (disk image):
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:      GUID_partition_scheme                        +1.1 GB     disk2
   1:                 Apple_APFS Container disk3         1.1 GB     disk2s1
~ hiroki.yagita(HirokinoMacBook-Pro) ✅
% diskutil ap list                                                                                                                                                                                                                                            3 19 月 14:03 JST
APFS Containers (2 found)
|
+-- Container disk1 84497440-BB45-42D6-871D-C699112BF211
|   ====================================================
|   APFS Container Reference:     disk1
|   Capacity Ceiling (Size):      250685575168 B (250.7 GB)
|   Capacity In Use By Volumes:   131016294400 B (131.0 GB) (52.3% used)
|   Capacity Available:           119669280768 B (119.7 GB) (47.7% free)
|   |
|   +-< Physical Store disk0s2 BA6A3FC1-80F2-43E1-8E3B-A3E1332AE6E3
|   |   -----------------------------------------------------------
|   |   APFS Physical Store Disk:   disk0s2
|   |   Size:                       250685575168 B (250.7 GB)
|   |
|   +-> Volume disk1s1 3FA291AC-2C6F-3E0A-B2B1-39C1AF6E6110
|   |   ---------------------------------------------------
|   |   APFS Volume Disk (Role):   disk1s1 (No specific role)
|   |   Name:                      Macintosh HD (Case-insensitive)
|   |   Mount Point:               /
|   |   Capacity Consumed:         124507766784 B (124.5 GB)
|   |   FileVault:                 Yes (Unlocked)
|   |
|   +-> Volume disk1s2 B135B2BC-E107-4ED7-B9A6-0A2A3D39A5C8
|   |   ---------------------------------------------------
|   |   APFS Volume Disk (Role):   disk1s2 (Preboot)
|   |   Name:                      Preboot (Case-insensitive)
|   |   Mount Point:               Not Mounted
|   |   Capacity Consumed:         21856256 B (21.9 MB)
|   |   FileVault:                 No
|   |
|   +-> Volume disk1s3 3452EA05-25B6-4628-8600-B9845CE659D3
|   |   ---------------------------------------------------
|   |   APFS Volume Disk (Role):   disk1s3 (Recovery)
|   |   Name:                      Recovery (Case-insensitive)
|   |   Mount Point:               Not Mounted
|   |   Capacity Consumed:         509820928 B (509.8 MB)
|   |   FileVault:                 No
|   |
|   +-> Volume disk1s4 FC4D0999-562D-4259-8144-0609E0811FEA
|       ---------------------------------------------------
|       APFS Volume Disk (Role):   disk1s4 (VM)
|       Name:                      VM (Case-insensitive)
|       Mount Point:               /private/var/vm
|       Capacity Consumed:         5838508032 B (5.8 GB)
|       FileVault:                 No
|
+-- Container disk3 18A5D99E-A19A-40B6-BC14-3C037B0E20B3
    ====================================================
    APFS Container Reference:     disk3
    Capacity Ceiling (Size):      1073700864 B (1.1 GB)
    Capacity In Use By Volumes:   3379200 B (3.4 MB) (0.3% used)
    Capacity Available:           1070321664 B (1.1 GB) (99.7% free)
    |
    +-< Physical Store disk2s1 26C74592-9743-4698-B34C-98ABEF234BA9
    |   -----------------------------------------------------------
    |   APFS Physical Store Disk:   disk2s1
    |   Size:                       1073700864 B (1.1 GB)
    |
    +-> Volume disk3s1 315E1C1C-5081-4451-9CFB-6166881C2B56
        ---------------------------------------------------
        APFS Volume Disk (Role):   disk3s1 (No specific role)
        Name:                      test (Case-insensitive)
        Mount Point:               /Volumes/test
        Capacity Consumed:         24576 B (24.6 KB)
        FileVault:                 No
~ hiroki.yagita(HirokinoMacBook-Pro) ✅
% ls -F /Volumes                                                                                                                                                                                                                                              3 19 月 14:04 JST
Macintosh HD@ Preboot/      test/
~ hiroki.yagita(HirokinoMacBook-Pro) ✅
% mount                                                                                                                                                                                                                                                       3 19 月 14:06 JST
/dev/disk1s1 on / (apfs, local, journaled)
devfs on /dev (devfs, local, nobrowse)
/dev/disk1s4 on /private/var/vm (apfs, local, noexec, journaled, noatime, nobrowse)
map -hosts on /net (autofs, nosuid, automounted, nobrowse)
map auto_home on /home (autofs, automounted, nobrowse)
/dev/disk3s1 on /Volumes/test (apfs, local, nodev, nosuid, journaled, noowners, mounted by hiroki.yagita)


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