How can I regain write permission on my Time Machine sparsebundle?

For my backup I use an encrypted virtual disk on a sparsebundle file that is stored in an external hard drive attached on a router via USB. This file is accessed via samba but for one reason I decided to use the HD directly attached to my mac. So I changed permission to access the file, because previously they were assigned to the user created on the router to access via smb, but I haven't only chmod the directory. I chown it for my mac user. Now when I try to mount the .sparsebundle it mount but Time Machine says it's in a readonly state and I'm not even able to actually read it. I tried to search the web for some days but I wasn't able to find the solution. I tried to force fsck_hfs but below is the result. Anyone can help me? I specify that the physical volume on the external drive is an EXT4 filesystem because the router runs on Linux. Maybe it add information to find the solution. sudo hdiutil attach -nomount -noverify -noautofsck /Volumes/Data/Dati/Time\ Machine.sparsebundle/ /dev/disk3 Apple_partition_scheme /dev/disk3s1 Apple_partition_map /dev/disk3s3 Apple_HFS sudo fsck_hfs -rc -fd /dev/disk3s3 ** /dev/rdisk3s3 Executing fsck_hfs (version hfs-407.50.6). Invalid content in journal ** Checking Journaled HFS Plus volume. The volume name is Time Machine ** Checking extents overflow file. Unused node is not erased (node = 2784) ** Checking catalog file. ** Rebuilding catalog B-tree. Disk full error ** The volume Time Machine could not be repaired. Invalid content in journal (4, 0) **EDIT:** Actually it could be also a filesystem problem, not (only) a permission one hdiutil attach /Volumes/Data/Dati/Time\ Machine.sparsebundle/ hdiutil: attach failed - no mountable file systems For testing purpose I attached again the HDD to the router and reenabled the smb share. Here is some screenshot of my setup. The smb share mounted on macos, with the sparsebundle that always mount in readonly The HDD mounted on the homemade NAS (/dev/sda3) The configuration of the Samba share (access -> read and write, even if we cannot read it from the screenshot) The permission settings on the directory mounted on the router **EDIT 2:** Executed fsck directly from the smb share. I cannot understand the difference but the output is much more verbose: mbp:~ asdasd$ sudo hdiutil attach -nomount -noverify -noautofsck /Volumes/HDD-3TB/Time\ Machine.sparsebundle/ /dev/disk2 Apple_partition_scheme /dev/disk2s1 Apple_partition_map /dev/disk2s3 Apple_HFS mbp:~ asdasd$ sudo fsck_hfs -dyf /dev/disk2s3 journal_replay(/dev/disk2s3) returned 0 ** /dev/rdisk2s3 Using cacheBlockSize=32K cacheTotalBlock=32768 cacheSize=1048576K. Executing fsck_hfs (version hfs-407.50.6). Invalid content in journal ** Checking Journaled HFS Plus volume. The volume name is Time Machine ** Checking extents overflow file. Unused node is not erased (node = 2784) Unused node is not erased (node = 2785) Unused node is not erased (node = 2786) Unused node is not erased (node = 2787) Unused node is not erased (node = 2788) Unused node is not erased (node = 2789) Unused node is not erased (node = 2790) Unused node is not erased (node = 2791) Unused node is not erased (node = 2792) Unused node is not erased (node = 2793) Unused node is not erased (node = 2794) Unused node is not erased (node = 2795) Unused node is not erased (node = 2796) Unused node is not erased (node = 2797) Unused node is not erased (node = 2798) Unused node is not erased (node = 2799) Unused node is not erased (node = 2800) Unused node is not erased (node = 2801) Unused node is not erased (node = 2802) Unused node is not erased (node = 2803) Unused node is not erased (node = 2804) Unused node is not erased (node = 2805) Unused node is not erased (node = 2806) Unused node is not erased (node = 2807) Unused node is not erased (node = 2808) Unused node is not erased (node = 2809) Unused node is not erased (node = 2810) Unused node is not erased (node = 2811) Unused node is not erased (node = 2812) Unused node is not erased (node = 2813) Unused node is not erased (node = 2814) Unused node is not erased (node = 2815) ** Checking catalog file. hfs_swap_BTNode: invalid forward link (0xC4663BAF) hfs_swap_BTNode: invalid backward link (0x5C275BF7) hfs_swap_BTNode: invalid node kind (-86) hfs_swap_BTNode: invalid node height (125) hfs_swap_BTNode: invalid record count (0x7A07) Invalid record count (4, 138355) hfs_swap_BTNode: invalid forward link (0x4503418D) hfs_swap_BTNode: invalid backward link (0x2A4FB6A0) hfs_swap_BTNode: invalid node kind (13) hfs_swap_BTNode: invalid node height (204) hfs_swap_BTNode: invalid record count (0xA115) Invalid record count (4, 138349) hfs_swap_BTNode: invalid forward link (0xA89C3ED0) hfs_swap_BTNode: invalid backward link (0x01F29D8B) hfs_swap_BTNode: invalid node kind (58) hfs_swap_BTNode: invalid node height (244) hfs_swap_BTNode: invalid record count (0x4C27) Invalid record count (4, 117907) hfs_swap_BTNode: invalid forward link (0xBD984CDE) hfs_swap_BTNode: invalid backward link (0x605E0605) hfs_swap_BTNode: invalid node kind (82) hfs_swap_BTNode: invalid node height (255) hfs_swap_BTNode: invalid record count (0x545E) Invalid record count (4, 15346) hfs_swap_BTNode: invalid forward link (0x10253D99) hfs_swap_BTNode: invalid backward link (0xE20E4C52) hfs_swap_BTNode: invalid node kind (5) hfs_swap_BTNode: invalid node height (62) hfs_swap_BTNode: invalid record count (0x46A0) Invalid record count (4, 15350) hfs_swap_BTNode: invalid forward link (0x89065B23) hfs_swap_BTNode: invalid backward link (0xEC5EA33C) hfs_swap_BTNode: invalid node kind (109) hfs_swap_BTNode: invalid node height (138) hfs_swap_BTNode: invalid record count (0x22B2) Invalid record count (4, 15351) hfs_swap_BTNode: invalid forward link (0xCB62D10A) hfs_swap_BTNode: invalid backward link (0xE4D99839) hfs_swap_BTNode: invalid node kind (38) hfs_swap_BTNode: invalid node height (178) hfs_swap_BTNode: invalid record count (0xA660) Invalid record count (4, 15354) hfs_swap_BTNode: invalid forward link (0x96DA8F15) hfs_swap_BTNode: invalid backward link (0x0425140D) hfs_swap_BTNode: invalid node kind (55) hfs_swap_BTNode: invalid node height (193) hfs_swap_BTNode: invalid record count (0xB64A) Invalid record count (4, 15356) hfs_swap_BTNode: invalid forward link (0x1BFF8923) hfs_swap_BTNode: invalid backward link (0x322A6002) hfs_swap_BTNode: invalid node kind (-86) hfs_swap_BTNode: invalid node height (50) hfs_swap_BTNode: invalid record count (0x2556) Invalid record count (4, 15361) hfs_swap_BTNode: invalid forward link (0x55587FAC) hfs_swap_BTNode: invalid backward link (0xBFFCD97E) hfs_swap_BTNode: invalid node kind (53) hfs_swap_BTNode: invalid node height (31) hfs_swap_BTNode: invalid record count (0x3D2E) Invalid record count (4, 15363) hfs_swap_BTNode: invalid forward link (0xF0AB994A) hfs_swap_BTNode: invalid backward link (0xD761E74A) hfs_swap_BTNode: invalid node kind (52) hfs_swap_BTNode: invalid node height (241) hfs_swap_BTNode: invalid record count (0x83C7) Invalid record count (4, 15359) hfs_swap_BTNode: invalid forward link (0x8265BB41) hfs_swap_BTNode: invalid backward link (0xDBAB6D74) hfs_swap_BTNode: invalid node kind (-117) hfs_swap_BTNode: invalid node height (89) hfs_swap_BTNode: invalid record count (0xB62B) Invalid record count (4, 15366) hfs_swap_BTNode: invalid forward link (0xA075EE7A) hfs_swap_BTNode: invalid backward link (0xA396FB09) hfs_swap_BTNode: invalid node kind (4) hfs_swap_BTNode: invalid node height (249) hfs_swap_BTNode: invalid record count (0xE600) Invalid record count (4, 15367) hfs_swap_BTNode: invalid forward link (0x60AE6546) hfs_swap_BTNode: invalid backward link (0x2DC43D0E) hfs_swap_BTNode: invalid node kind (25) hfs_swap_BTNode: invalid node height (163) hfs_swap_BTNode: invalid record count (0x1620) Invalid record count (4, 15372) hfs_swap_BTNode: invalid forward link (0x14D20EF4) hfs_swap_BTNode: invalid backward link (0x6DA1EB27) hfs_swap_BTNode: invalid node kind (-43) hfs_swap_BTNode: invalid node height (13) hfs_swap_BTNode: invalid record count (0x3B82) Invalid record count (4, 15376) hfs_swap_BTNode: invalid forward link (0x4502411B) hfs_swap_BTNode: invalid backward link (0x27F70985) hfs_swap_BTNode: invalid node kind (-71) hfs_swap_BTNode: invalid node height (133) hfs_swap_BTNode: invalid record count (0x391E) Invalid record count (4, 15380) hfs_swap_BTNode: invalid forward link (0xD5E9CF80) hfs_swap_BTNode: invalid backward link (0x8D0C5384) hfs_swap_BTNode: invalid node kind (95) hfs_swap_BTNode: invalid node height (81) hfs_swap_BTNode: invalid record count (0x68C2) Invalid record count (4, 15384) hfs_swap_BTNode: invalid forward link (0xCD183754) hfs_swap_BTNode: invalid backward link (0x4162C8FC) hfs_swap_BTNode: invalid node kind (24) hfs_swap_BTNode: invalid node height (46) hfs_swap_BTNode: invalid record count (0x6AAA) Invalid record count (4, 15388) hfs_swap_BTNode: invalid forward link (0x30398884) hfs_swap_BTNode: invalid backward link (0x5D6E1DEF) hfs_swap_BTNode: invalid node kind (94) hfs_swap_BTNode: invalid node height (35) hfs_swap_BTNode: invalid record count (0xB4BA) Invalid record count (4, 15390) hfs_swap_BTNode: invalid forward link (0x9ED1D2C2) hfs_swap_BTNode: invalid backward link (0x927DFDD5) hfs_swap_BTNode: invalid node kind (-17) hfs_swap_BTNode: invalid node height (229) hfs_swap_BTNode: offset #0 invalid (0x9FF7) (blockSize 0x2000 numRecords 1843) Invalid node structure (4, 15392) hfs_swap_BTNode: invalid forward link (0x7293EA34) hfs_swap_BTNode: invalid backward link (0x1079EF12) hfs_swap_BTNode: invalid node kind (35) hfs_swap_BTNode: invalid node height (7) hfs_swap_BTNode: invalid record count (0x6341) Invalid record count (4, 15399) hfs_swap_BTNode: invalid forward link (0xC34E551E) hfs_swap_BTNode: invalid backward link (0xB58FFB11) hfs_swap_BTNode: invalid node kind (52) hfs_swap_BTNode: invalid node height (154) hfs_swap_BTNode: invalid record count (0x7A42) Invalid record count (4, 15406) hfs_swap_BTNode: invalid forward link (0x62012680) hfs_swap_BTNode: invalid backward link (0x25D211FD) hfs_swap_BTNode: invalid node kind (89) hfs_swap_BTNode: invalid node height (87) hfs_swap_BTNode: invalid record count (0x6038) Invalid record count (4, 15414) hfs_swap_BTNode: invalid forward link (0xE8995EC5) hfs_swap_BTNode: invalid backward link (0xACFEC80F) hfs_swap_BTNode: invalid node kind (115) hfs_swap_BTNode: invalid node height (240) hfs_swap_BTNode: invalid record count (0x6CED) Invalid record count (4, 15430) hfs_swap_BTNode: invalid forward link (0x4E0F412C) hfs_swap_BTNode: invalid backward link (0xEB45452D) hfs_swap_BTNode: invalid node kind (21) hfs_swap_BTNode: invalid node height (253) hfs_swap_BTNode: invalid record count (0x8B26) Invalid record count (4, 15439) hfs_swap_BTNode: invalid forward link (0x16E2F4F5) hfs_swap_BTNode: invalid backward link (0xB2D9EC11) hfs_swap_BTNode: invalid node kind (4) hfs_swap_BTNode: invalid node height (90) hfs_swap_BTNode: invalid record count (0x59F3) Invalid record count (4, 15443) hfs_swap_BTNode: invalid forward link (0xFE2CA3C7) hfs_swap_BTNode: invalid backward link (0x8E2D4CAA) hfs_swap_BTNode: invalid node kind (-11) hfs_swap_BTNode: invalid node height (238) hfs_swap_BTNode: invalid record count (0x8B13) Invalid record count (4, 15453) hfs_swap_BTNode: invalid forward link (0xB1B3FE24) hfs_swap_BTNode: invalid backward link (0x06F47091) hfs_swap_BTNode: invalid node kind (126) hfs_swap_BTNode: invalid node height (171) hfs_swap_BTNode: invalid record count (0x54F7) Invalid record count (4, 15457) hfs_swap_BTNode: invalid forward link (0x7B8EDD20) hfs_swap_BTNode: invalid backward link (0x86BB009C) hfs_swap_BTNode: invalid node kind (-30) hfs_swap_BTNode: invalid node height (82) hfs_swap_BTNode: invalid record count (0x9C0B) Invalid record count (4, 15459) hfs_swap_BTNode: invalid forward link (0x3385DB18) hfs_swap_BTNode: invalid backward link (0xD6BA8FAD) hfs_swap_BTNode: invalid node kind (-119) hfs_swap_BTNode: invalid node height (192) hfs_swap_BTNode: invalid record count (0x5DE7) Invalid record count (4, 15451) hfs_swap_BTNode: invalid forward link (0xF61BE3A7) hfs_swap_BTNode: invalid backward link (0xB9C758D4) hfs_swap_BTNode: invalid node kind (-8) hfs_swap_BTNode: invalid node height (132) hfs_swap_BTNode: invalid record count (0x9329) Invalid record count (4, 15466) hfs_swap_BTNode: invalid forward link (0xCE4305BC) hfs_swap_BTNode: invalid backward link (0xE513F9D8) hfs_swap_BTNode: invalid node kind (-103) hfs_swap_BTNode: invalid node height (227) hfs_swap_BTNode: invalid record count (0x5868) Invalid record count (4, 15470) hfs_swap_BTNode: invalid forward link (0xB6E6C582) hfs_swap_BTNode: invalid backward link (0xBF967F87) hfs_swap_BTNode: invalid node kind (16) hfs_swap_BTNode: invalid node height (95) hfs_swap_BTNode: invalid record count (0xD4BD) Invalid record count (4, 15474) hfs_swap_BTNode: invalid forward link (0x43C7A9AD) hfs_swap_BTNode: invalid backward link (0x55670FA5) hfs_swap_BTNode: invalid node kind (-61) hfs_swap_BTNode: invalid node height (43) hfs_swap_BTNode: invalid record count (0x6EFA) Invalid record count (4, 15476) hfs_swap_BTNode: invalid forward link (0xF930D5AA) hfs_swap_BTNode: invalid backward link (0x92E89158) hfs_swap_BTNode: invalid node kind (-66) hfs_swap_BTNode: invalid node height (97) hfs_swap_BTNode: invalid record count (0x3969) Invalid record count (4, 15478) hfs_swap_BTNode: invalid forward link (0x0356D5D6) hfs_swap_BTNode: invalid backward link (0x8C032195) hfs_swap_BTNode: invalid node kind (41) hfs_swap_BTNode: invalid node height (110) hfs_swap_BTNode: invalid record count (0x8BC2) Invalid record count (4, 15504) hfs_swap_BTNode: invalid forward link (0x719EAB8D) hfs_swap_BTNode: invalid backward link (0x866A3F4B) hfs_swap_BTNode: invalid node kind (60) hfs_swap_BTNode: invalid node height (52) hfs_swap_BTNode: invalid record count (0x4268) Invalid record count (4, 15510) hfs_swap_BTNode: invalid forward link (0xE9849E68) hfs_swap_BTNode: invalid backward link (0x4444F22C) hfs_swap_BTNode: invalid node kind (120) hfs_swap_BTNode: invalid node height (202) hfs_swap_BTNode: invalid record count (0xCA19) Invalid record count (4, 118664) Invalid node structure (4, 45169) Invalid sibling link (4, 45169) Node 45169's back link is 0x0; expected 0x7758 disk offset = 0xcd8fd000, size = 0x2000 Invalid sibling link (4, 45169) Node 45169's forward link is 0x0; expected 0xb074 disk offset = 0xcd8fd000, size = 0x2000 Invalid node height (4, 45169) Index key doesn't match first node key Invalid index key (4, 45169) Invalid node structure (4, 45189) Invalid sibling link (4, 45189) Node 45189's back link is 0x0; expected 0xb082 disk offset = 0xcd925000, size = 0x2000 Invalid sibling link (4, 45189) Node 45189's forward link is 0x0; expected 0xb081 disk offset = 0xcd925000, size = 0x2000 Invalid node height (4, 45189) Index key doesn't match first node key Invalid index key (4, 45189) Invalid node structure (4, 45185) Invalid sibling link (4, 45185) Node 45185's back link is 0x0; expected 0xb085 disk offset = 0xcd91d000, size = 0x2000 Invalid sibling link (4, 45185) Node 45185's forward link is 0x0; expected 0xb089 disk offset = 0xcd91d000, size = 0x2000 Invalid node height (4, 45185) Index key doesn't match first node key Invalid index key (4, 45185) Invalid node structure (4, 45200) Invalid sibling link (4, 45200) Node 45200's back link is 0x0; expected 0xb08e disk offset = 0xcd93b000, size = 0x2000 Invalid sibling link (4, 45200) Node 45200's forward link is 0x0; expected 0xb092 disk offset = 0xcd93b000, size = 0x2000 Invalid node height (4, 45200) Index key doesn't match first node key Invalid index key (4, 45200) Invalid node structure (4, 45206) Invalid sibling link (4, 45206) Node 45206's back link is 0x0; expected 0xb09a disk offset = 0xcd947000, size = 0x2000 Invalid sibling link (4, 45206) Node 45206's forward link is 0x0; expected 0xb09c disk offset = 0xcd947000, size = 0x2000 Invalid node height (4, 45206) Index key doesn't match first node key Invalid index key (4, 45206) Invalid node structure (4, 45212) Invalid sibling link (4, 45212) Node 45212's back link is 0x0; expected 0xb096 disk offset = 0xcd953000, size = 0x2000 Invalid sibling link (4, 45212) Node 45212's forward link is 0x0; expected 0x18d4b disk offset = 0xcd953000, size = 0x2000 Invalid node height (4, 45212) Index key doesn't match first node key Invalid index key (4, 45212) Invalid node structure (4, 45217) Invalid sibling link (4, 45217) Node 45217's back link is 0x0; expected 0xb09f disk offset = 0xcd95d000, size = 0x2000 Invalid sibling link (4, 45217) Node 45217's forward link is 0x0; expected 0xb0a5 disk offset = 0xcd95d000, size = 0x2000 Invalid node height (4, 45217) Index key doesn't match first node key Invalid index key (4, 45217) Invalid node structure (4, 45232) Invalid sibling link (4, 45232) Node 45232's back link is 0x0; expected 0xb0b5 disk offset = 0xcd97b000, size = 0x2000 Invalid sibling link (4, 45232) Node 45232's forward link is 0x0; expected 0xb0b7 disk offset = 0xcd97b000, size = 0x2000 Invalid node height (4, 45232) Index key doesn't match first node key Invalid index key (4, 45232) Invalid node structure (4, 101709) Invalid sibling link (4, 101709) Node 101709's back link is 0x0; expected 0xb0bc disk offset = 0xe92b5000, size = 0x2000 Invalid sibling link (4, 101709) Node 101709's forward link is 0x0; expected 0xb0bd disk offset = 0xe92b5000, size = 0x2000 Invalid node height (4, 101709) Index key doesn't match first node key Invalid index key (4, 101709) Invalid node structure (4, 45245) Invalid sibling link (4, 45245) Node 45245's back link is 0x0; expected 0x18d4d disk offset = 0xcd995000, size = 0x2000 Invalid sibling link (4, 45245) Node 45245's forward link is 0x0; expected 0xb0c1 disk offset = 0xcd995000, size = 0x2000 Invalid node height (4, 45245) Index key doesn't match first node key Invalid index key (4, 45245) Invalid node structure (4, 132677) Invalid sibling link (4, 132677) Node 132677's back link is 0x0; expected 0x20646 disk offset = 0xf84a5000, size = 0x2000 Invalid sibling link (4, 132677) Node 132677's forward link is 0x0; expected 0x7760 disk offset = 0xf84a5000, size = 0x2000 Invalid node height (4, 132677) Index key doesn't match first node key Invalid index key (4, 132677) Invalid node structure (4, 30560) Invalid sibling link (4, 30560) Node 30560's back link is 0x0; expected 0x20645 disk offset = 0xc66db000, size = 0x2000 Invalid sibling link (4, 30560) Node 30560's forward link is 0x0; expected 0x20655 disk offset = 0xc66db000, size = 0x2000 Invalid node height (4, 30560) Index key doesn't match first node key Invalid index key (4, 30560) Invalid node structure (4, 45251) Invalid sibling link (4, 45251) Node 45251's back link is 0x0; expected 0x18d50 disk offset = 0xcd9a1000, size = 0x2000 Invalid sibling link (4, 45251) Node 45251's forward link is 0x0; expected 0xb0d0 disk offset = 0xcd9a1000, size = 0x2000 Invalid node height (4, 45251) Index key doesn't match first node key Invalid index key (4, 45251) Invalid node structure (4, 45265) Invalid sibling link (4, 45265) Node 45265's back link is 0x0; expected 0x20683 disk offset = 0xcd9bd000, size = 0x2000 Invalid sibling link (4, 45265) Node 45265's forward link is 0x0; expected 0xb0d5 disk offset = 0xcd9bd000, size = 0x2000 Invalid node height (4, 45265) Index key doesn't match first node key Invalid index key (4, 45265) ** The volume Time Machine could not be verified completely. volume check failed with error 7 volume type is pure HFS+ primary MDB is at block 0 0x00 alternate MDB is at block 0 0x00 primary VHB is at block 2 0x02 alternate VHB is at block 1952453214 0x7460125e sector size = 512 0x200 VolumeObject flags = 0x07 total sectors for volume = 1952453216 0x74601260 total sectors for embedded volume = 0 0x00 CheckForClean - could not get VHB/MDB at block 1952453214 CheckHFS returned -1317, fsmodified = 0