Hi All,
I have just experienced my first APFS corruption. Corruption happened immediately after the creation of a new Volume. Here relevant outputs.
Ideas to fix this? Filed a RDAR: 26844922.
darkstar:~ root# df
Filesystem 512-blocks Used Available Capacity iused ifree %iused Mounted on
/dev/disk2 133454592 69024720 63917872 52% 854500 4294112779 0% /
devfs 407 407 0 100% 705 0 100% /dev
/dev/disk1 838919560 632771328 206148232 76% 2583443 4292383836 0% /Volumes/Macintosh HD
map -hosts 0 0 0 100% 0 0 100% /net
map auto_home 0 0 0 100% 0 0 100% /home
/dev/disk4s2 116633168 306144 116327024 1% 78 4294967201 0% /Volumes/Untitled
darkstar:~ root# diskutil apfs createContainer disk4s2
Started APFS operation on disk4s2 Untitled
Creating a new empty APFS Container
Unmounting Volumes
Switching disk4s2 to APFS
Creating APFS Container
Created new APFS Container disk4s2
Finished APFS operation on disk4s2 Untitled
darkstar:~ root# diskutil apfs list
======================================================================================================
ENUMERATION OF ALL CURRENT APFS OBJECTS
APFS CONTAINER: REFERENCE: disk4s2 Total Container Size = 59.7 GB (59716182016 Bytes)
| Container Free Space = 59.6 GB (59634237440 Bytes)
|
|--< APFS PHYSICAL STORE: disk4s2
|
======================================================================================================
---------------------------------------------------------------------
APFS OBJECTS BY ITERATING ALL CURRENT DISKS WHILE CHECKING APFS ROLES
APFS PHYSICAL STORE = disk4s2 -> APFS CONTAINER REFERENCE = disk4s2
---------------------------------------------------------------------
darkstar:~ root# diskutil apfs addVolume disk4s2 APFS MyFirstAPFS
Exporting new shared unencrypted APFS Volume "MyFirstAPFS" from APFS Container Reference disk4s2
Started APFS operation
Adding APFS Volume to APFS Container
Creating APFS Volume
Created new APFS Volume disk4s2s1
Mounting APFS Volume
Error: -69842: Couldn't mount disk
darkstar:~ root# diskutil mount /dev/disk4s2s1
Volume on disk4s2s1 failed to mount
If the volume is damaged, try the "readOnly" option
darkstar:~ root# diskutil mount /dev/disk4s2
Volume on disk4s2 failed to mount
If the volume is damaged, try the "readOnly" option
darkstar:~ root# diskutil list
[…]
/dev/disk4s2s1 (external, virtual):
#: TYPE NAME SIZE IDENTIFIER
0: APFS Volume MyFirstAPFS +20.5 KB disk4s2s1
darkstar:~ root# fsck_apfs /dev/disk4s2s1
** Checking volume.
** Checking the container superblock.
** Checking the space manager.
** Checking the object map.
** Checking the APFS volume superblock.
** Checking the object map.
** Checking the fsroot tree.
** Checking the extent ref tree.
** Checking the snapshot metadata tree.
** Checking the snapshots.
fsck_apfs: btree: invalid btn_btree.bt_longest_val (0), given btn_btree.bt_fixed.bt_val_size
Space Verification failed.
** The volume /dev/disk4s2s1 could not be verified completely.