Samba Backup Troubleshooting

#!/bin/sh
samba-tool domain backup online \
    --server=dc01.my.domain \
    --configfile=/mnt/backups/dc01/smb.conf.dc01 \
    --realm=MY.DOMAIN \
    --username=administrator@MY.DOMAIN \
    --targetdir=/mnt/backups/dc01/

administrator@dc02:/usr/local/bin$ sudo ./samba-db-dc01.sh
GENSEC backend 'gssapi_spnego' registered  
GENSEC backend 'gssapi_krb5' registered  
GENSEC backend 'gssapi_krb5_sasl' registered  
GENSEC backend 'spnego' registered  
GENSEC backend 'schannel' registered  
GENSEC backend 'naclrpc_as_system' registered  
GENSEC backend 'sasl-EXTERNAL' registered  
GENSEC backend 'ntlmssp' registered  
GENSEC backend 'ntlmssp_resume_ccache' registered  
GENSEC backend 'http_basic' registered  
GENSEC backend 'http_ntlm' registered  
GENSEC backend 'http_negotiate' registered  
GENSEC backend 'krb5' registered  
GENSEC backend 'fake_gssapi_krb5' registered  
resolve_lmhosts: Attempting lmhosts lookup for name dc01.my.domain<0x20>
resolve_lmhosts: Attempting lmhosts lookup for name dc01.my.domain<0x20>
Password for [administrator@my.domain]:
INFO 2022-05-02 15:39:52,649 pid:48527 /usr/lib/python3/dist-packages/samba/join.py #1575: workgroup is my
INFO 2022-05-02 15:39:52,650 pid:48527 /usr/lib/python3/dist-packages/samba/join.py #1578: realm is my.domain
Calling bare provision
lpcfg_load: refreshing parameters from /mnt/backups/dc01/tmplx7rxds9/etc/smb.conf
lpcfg_load: refreshing parameters from /mnt/backups/dc01/tmplx7rxds9/etc/smb.conf
INFO 2022-05-02 15:39:52,656 pid:48527 /usr/lib/python3/dist-packages/samba/provision/__init__.py #2122: Looking up IPv4 addresses
INFO 2022-05-02 15:39:52,657 pid:48527 /usr/lib/python3/dist-packages/samba/provision/__init__.py #2139: Looking up IPv6 addresses
WARNING 2022-05-02 15:39:52,657 pid:48527 /usr/lib/python3/dist-packages/samba/provision/__init__.py #2146: No IPv6 address will be assigned
INFO 2022-05-02 15:39:52,895 pid:48527 /usr/lib/python3/dist-packages/samba/provision/__init__.py #2290: Setting up share.ldb
INFO 2022-05-02 15:39:52,922 pid:48527 /usr/lib/python3/dist-packages/samba/provision/__init__.py #2294: Setting up secrets.ldb
INFO 2022-05-02 15:39:52,942 pid:48527 /usr/lib/python3/dist-packages/samba/provision/__init__.py #2299: Setting up the registry
ldb_wrap open of hklm.ldb
Key 'key=SOFTWARE,hive=NONE' not found  
key added: key=SOFTWARE,hive=NONE
Key 'key=Microsoft,key=SOFTWARE,hive=NONE' not found  
key added: key=Microsoft,key=SOFTWARE,hive=NONE
Key 'key=Windows NT,key=Microsoft,key=SOFTWARE,hive=NONE' not found  
key added: key=Windows NT,key=Microsoft,key=SOFTWARE,hive=NONE
Key 'key=CurrentVersion,key=Windows NT,key=Microsoft,key=SOFTWARE,hive=NONE' not found  
key added: key=CurrentVersion,key=Windows NT,key=Microsoft,key=SOFTWARE,hive=NONE
Key 'key=SYSTEM,hive=NONE' not found  
key added: key=SYSTEM,hive=NONE
Key 'key=CurrentControlSet,key=SYSTEM,hive=NONE' not found  
key added: key=CurrentControlSet,key=SYSTEM,hive=NONE
Key 'key=Control,key=CurrentControlSet,key=SYSTEM,hive=NONE' not found  
key added: key=Control,key=CurrentControlSet,key=SYSTEM,hive=NONE
Key 'key=ProductOptions,key=Control,key=CurrentControlSet,key=SYSTEM,hive=NONE' not found  
key added: key=ProductOptions,key=Control,key=CurrentControlSet,key=SYSTEM,hive=NONE
Key 'key=Print,key=Control,key=CurrentControlSet,key=SYSTEM,hive=NONE' not found  
key added: key=Print,key=Control,key=CurrentControlSet,key=SYSTEM,hive=NONE
Key 'key=Terminal Server,key=Control,key=CurrentControlSet,key=SYSTEM,hive=NONE' not found  
key added: key=Terminal Server,key=Control,key=CurrentControlSet,key=SYSTEM,hive=NONE
Key 'key=Services,key=CurrentControlSet,key=SYSTEM,hive=NONE' not found  
key added: key=Services,key=CurrentControlSet,key=SYSTEM,hive=NONE
Key 'key=Netlogon,key=Services,key=CurrentControlSet,key=SYSTEM,hive=NONE' not found  
key added: key=Netlogon,key=Services,key=CurrentControlSet,key=SYSTEM,hive=NONE
Key 'key=Parameters,key=Netlogon,key=Services,key=CurrentControlSet,key=SYSTEM,hive=NONE' not found  
key added: key=Parameters,key=Netlogon,key=Services,key=CurrentControlSet,key=SYSTEM,hive=NONE
Key 'key=Alerter,key=Services,key=CurrentControlSet,key=SYSTEM,hive=NONE' not found  
key added: key=Alerter,key=Services,key=CurrentControlSet,key=SYSTEM,hive=NONE
Key 'key=Parameters,key=Alerter,key=Services,key=CurrentControlSet,key=SYSTEM,hive=NONE' not found  
key added: key=Parameters,key=Alerter,key=Services,key=CurrentControlSet,key=SYSTEM,hive=NONE
INFO 2022-05-02 15:39:53,020 pid:48527 /usr/lib/python3/dist-packages/samba/provision/__init__.py #2302: Setting up the privileges database
INFO 2022-05-02 15:39:53,062 pid:48527 /usr/lib/python3/dist-packages/samba/provision/__init__.py #2305: Setting up idmap db
INFO 2022-05-02 15:39:53,090 pid:48527 /usr/lib/python3/dist-packages/samba/provision/__init__.py #2312: Setting up SAM db
INFO 2022-05-02 15:39:53,098 pid:48527 /usr/lib/python3/dist-packages/samba/provision/__init__.py #897: Setting up sam.ldb partitions and settings
INFO 2022-05-02 15:39:53,098 pid:48527 /usr/lib/python3/dist-packages/samba/provision/__init__.py #909: Setting up sam.ldb rootDSE
INFO 2022-05-02 15:39:53,103 pid:48527 /usr/lib/python3/dist-packages/samba/provision/__init__.py #1322: Pre-loading the Samba 4 and AD schema
partition_metadata: Migrating partition metadata: open of metadata.tdb gave: No such Base DN: @INDEXLIST
Unable to determine the DomainSID, can not enforce uniqueness constraint on local domainSIDs

INFO 2022-05-02 15:39:53,139 pid:48527 /usr/lib/python3/dist-packages/samba/provision/__init__.py #2364: A Kerberos configuration suitable for Samba AD has been generated at /mnt/backups/dc01/tmplx7rxds9/private/krb5.conf
INFO 2022-05-02 15:39:53,139 pid:48527 /usr/lib/python3/dist-packages/samba/provision/__init__.py #2366: Merge the contents of this file with your system krb5.conf or replace it with this one. Do not create a symlink!
Provision OK for domain DN DC=my,DC=domain
Starting replication
Using DS_BIND_GUID_W2K3
Using binding ncacn_ip_tcp:dc01.my.domain[,seal]
resolve_lmhosts: Attempting lmhosts lookup for name dc01.my.domain<0x20>
resolve_lmhosts: Attempting lmhosts lookup for name dc01.my.domain<0x20>
Schema-DN[CN=Schema,CN=Configuration,DC=my,DC=domain] objects[402/1739] linked_values[0/0]
Schema-DN[CN=Schema,CN=Configuration,DC=my,DC=domain] objects[804/1739] linked_values[0/0]
Schema-DN[CN=Schema,CN=Configuration,DC=my,DC=domain] objects[1206/1739] linked_values[0/0]
Schema-DN[CN=Schema,CN=Configuration,DC=my,DC=domain] objects[1608/1739] linked_values[0/0]
Schema-DN[CN=Schema,CN=Configuration,DC=my,DC=domain] objects[1739/1739] linked_values[0/0]
Analyze and apply schema objects
Replicated 1739 objects (0 linked attributes) for CN=Schema,CN=Configuration,DC=my,DC=domain
Partition[CN=Configuration,DC=my,DC=domain] objects[402/1633] linked_values[0/0]
Replicated 402 objects (0 linked attributes) for CN=Configuration,DC=my,DC=domain
Partition[CN=Configuration,DC=my,DC=domain] objects[804/1633] linked_values[0/0]
Replicated 402 objects (0 linked attributes) for CN=Configuration,DC=my,DC=domain
Partition[CN=Configuration,DC=my,DC=domain] objects[1206/1633] linked_values[0/0]
Replicated 402 objects (0 linked attributes) for CN=Configuration,DC=my,DC=domain
Partition[CN=Configuration,DC=my,DC=domain] objects[1608/1633] linked_values[0/0]
Replicated 402 objects (0 linked attributes) for CN=Configuration,DC=my,DC=domain
Partition[CN=Configuration,DC=my,DC=domain] objects[1633/1633] linked_values[36/36]
Missing target while attempting to apply records: Deleted target CN=NTDS Settings\0ADEL:f2c595f2-3658-4be8-b088-2cab0cc4ad6a,CN=dc02\0ADEL:53526794-513d-4979-a472-c44f6be8bd0f,CN=Servers,CN=Gross-Gerau,CN=Sites,CN=Configuration,DC=my,DC=domain GUID f2c595f2-3658-4be8-b088-2cab0cc4ad6a linked from CN=eae38574-1f35-468b-8ffe-87a1ae6e9c74,CN=Partitions,CN=Configuration,DC=my,DC=domain

Failed to commit objects: DOS code 0x000021bf
Missing target object - retrying with DRS_GET_TGT
Partition[CN=Configuration,DC=my,DC=domain] objects[2035/1633] linked_values[36/0]
Replicated 402 objects (0 linked attributes) for CN=Configuration,DC=my,DC=domain
Partition[CN=Configuration,DC=my,DC=domain] objects[2437/1633] linked_values[36/0]
Replicated 402 objects (0 linked attributes) for CN=Configuration,DC=my,DC=domain
Partition[CN=Configuration,DC=my,DC=domain] objects[2839/1633] linked_values[36/0]
Replicated 402 objects (0 linked attributes) for CN=Configuration,DC=my,DC=domain
Partition[CN=Configuration,DC=my,DC=domain] objects[3241/1633] linked_values[36/0]
Replicated 402 objects (0 linked attributes) for CN=Configuration,DC=my,DC=domain
Partition[CN=Configuration,DC=my,DC=domain] objects[3266/1633] linked_values[72/36]
Replicated 25 objects (36 linked attributes) for CN=Configuration,DC=my,DC=domain
Replicating critical objects from the base DN of the domain
Partition[DC=my,DC=domain] objects[98/97] linked_values[24/24]
Replicated 98 objects (24 linked attributes) for DC=my,DC=domain
Partition[DC=my,DC=domain] objects[388/388] linked_values[27/27]
Replicated 388 objects (27 linked attributes) for DC=my,DC=domain
Done with always replicated NC (base, config, schema)
Replicating DC=DomainDnsZones,DC=my,DC=domain
Partition[DC=DomainDnsZones,DC=my,DC=domain] objects[75/75] linked_values[0/0]
Replicated 75 objects (0 linked attributes) for DC=DomainDnsZones,DC=my,DC=domain
Replicating DC=ForestDnsZones,DC=my,DC=domain
Partition[DC=ForestDnsZones,DC=my,DC=domain] objects[26/26] linked_values[0/0]
Replicated 26 objects (0 linked attributes) for DC=ForestDnsZones,DC=my,DC=domain
Committing SAM database
replmd_prepare_commit: Processing linked attributes
Discarding older DRS linked attribute update to msDS-NC-Replica-Locations on CN=eae38574-1f35-468b-8ffe-87a1ae6e9c74,CN=Partitions,CN=Configuration,DC=my,DC=domain from 4acdfe5f-21fc-44cb-92df-e2ce461b2594
Discarding older DRS linked attribute update to msDS-NC-Replica-Locations on CN=eae38574-1f35-468b-8ffe-87a1ae6e9c74,CN=Partitions,CN=Configuration,DC=my,DC=domain from 4acdfe5f-21fc-44cb-92df-e2ce461b2594
replmd_allow_missing_target: CN=NTDS Settings\0ADEL:f2c595f2-3658-4be8-b088-2cab0cc4ad6a,CN=dc02\0ADEL:53526794-513d-4979-a472-c44f6be8bd0f,CN=Servers,CN=Gross-Gerau,CN=Sites,CN=Configuration,DC=my,DC=domain is Deleted but up to date. Ignoring link from CN=eae38574-1f35-468b-8ffe-87a1ae6e9c74,CN=Partitions,CN=Configuration,DC=my,DC=domain
replmd_allow_missing_target: CN=NTDS Settings\0ADEL:f2c595f2-3658-4be8-b088-2cab0cc4ad6a,CN=dc02\0ADEL:53526794-513d-4979-a472-c44f6be8bd0f,CN=Servers,CN=Gross-Gerau,CN=Sites,CN=Configuration,DC=my,DC=domain is Deleted but up to date. Ignoring link from CN=f2cc8b1b-5761-447c-b3b0-c4eba0975e3c,CN=Partitions,CN=Configuration,DC=my,DC=domain
Discarding older DRS linked attribute update to member on CN=Pre-Windows 2000 Compatible Access,CN=Builtin,DC=my,DC=domain from 4acdfe5f-21fc-44cb-92df-e2ce461b2594
Discarding older DRS linked attribute update to member on CN=IIS_IUSRS,CN=Builtin,DC=my,DC=domain from 4acdfe5f-21fc-44cb-92df-e2ce461b2594
Discarding older DRS linked attribute update to member on CN=Schema Admins,CN=Users,DC=my,DC=domain from 4acdfe5f-21fc-44cb-92df-e2ce461b2594
Discarding older DRS linked attribute update to member on CN=Administrators,CN=Builtin,DC=my,DC=domain from 4acdfe5f-21fc-44cb-92df-e2ce461b2594
Discarding older DRS linked attribute update to member on CN=Administrators,CN=Builtin,DC=my,DC=domain from 4acdfe5f-21fc-44cb-92df-e2ce461b2594
Discarding older DRS linked attribute update to member on CN=Administrators,CN=Builtin,DC=my,DC=domain from 4acdfe5f-21fc-44cb-92df-e2ce461b2594
Discarding older DRS linked attribute update to member on CN=Administrators,CN=Builtin,DC=my,DC=domain from 4acdfe5f-21fc-44cb-92df-e2ce461b2594
Discarding older DRS linked attribute update to member on CN=Enterprise Admins,CN=Users,DC=my,DC=domain from 4acdfe5f-21fc-44cb-92df-e2ce461b2594
Discarding older DRS linked attribute update to member on CN=Domain Admins,CN=Users,DC=my,DC=domain from 4acdfe5f-21fc-44cb-92df-e2ce461b2594
Discarding older DRS linked attribute update to member on CN=Guests,CN=Builtin,DC=my,DC=domain from 4acdfe5f-21fc-44cb-92df-e2ce461b2594
Discarding older DRS linked attribute update to member on CN=Guests,CN=Builtin,DC=my,DC=domain from 4acdfe5f-21fc-44cb-92df-e2ce461b2594
Discarding older DRS linked attribute update to member on CN=Denied RODC Password Replication Group,CN=Users,DC=my,DC=domain from 4acdfe5f-21fc-44cb-92df-e2ce461b2594
Discarding older DRS linked attribute update to member on CN=Denied RODC Password Replication Group,CN=Users,DC=my,DC=domain from 4acdfe5f-21fc-44cb-92df-e2ce461b2594
Discarding older DRS linked attribute update to member on CN=Denied RODC Password Replication Group,CN=Users,DC=my,DC=domain from 4acdfe5f-21fc-44cb-92df-e2ce461b2594
Discarding older DRS linked attribute update to member on CN=Denied RODC Password Replication Group,CN=Users,DC=my,DC=domain from 4acdfe5f-21fc-44cb-92df-e2ce461b2594
Discarding older DRS linked attribute update to member on CN=Denied RODC Password Replication Group,CN=Users,DC=my,DC=domain from 4acdfe5f-21fc-44cb-92df-e2ce461b2594
Discarding older DRS linked attribute update to member on CN=Denied RODC Password Replication Group,CN=Users,DC=my,DC=domain from 4acdfe5f-21fc-44cb-92df-e2ce461b2594
Discarding older DRS linked attribute update to member on CN=Denied RODC Password Replication Group,CN=Users,DC=my,DC=domain from 4acdfe5f-21fc-44cb-92df-e2ce461b2594
Discarding older DRS linked attribute update to member on CN=Denied RODC Password Replication Group,CN=Users,DC=my,DC=domain from 4acdfe5f-21fc-44cb-92df-e2ce461b2594
Discarding older DRS linked attribute update to member on CN=Group Policy Creator Owners,CN=Users,DC=my,DC=domain from 4acdfe5f-21fc-44cb-92df-e2ce461b2594
Discarding older DRS linked attribute update to member on CN=Users,CN=Builtin,DC=my,DC=domain from 4acdfe5f-21fc-44cb-92df-e2ce461b2594
Discarding older DRS linked attribute update to member on CN=Users,CN=Builtin,DC=my,DC=domain from 4acdfe5f-21fc-44cb-92df-e2ce461b2594
Discarding older DRS linked attribute update to member on CN=Users,CN=Builtin,DC=my,DC=domain from 4acdfe5f-21fc-44cb-92df-e2ce461b2594
Discarding older DRS linked attribute update to member on CN=Windows Authorization Access Group,CN=Builtin,DC=my,DC=domain from 4acdfe5f-21fc-44cb-92df-e2ce461b2594
Repacking database from v1 to v2 format (first record CN=ms-DS-Failed-Interactive-Logon-Count-At-Last-Successful-Logon,CN=Schema,CN=Configuration,DC=my,DC=domain)
Repack: re-packed 10000 records so far
Repacking database from v1 to v2 format (first record CN=siteLink-Display,CN=404,CN=DisplaySpecifiers,CN=Configuration,DC=my,DC=domain)
Repacking database from v1 to v2 format (first record DC=_gc._tcp.Darmstadt._sites,DC=my.domain,CN=MicrosoftDNS,DC=DomainDnsZones,DC=my,DC=domain)
Repacking database from v1 to v2 format (first record DC=_ldap._tcp.pdc,DC=_msdcs.my.domain,CN=MicrosoftDNS,DC=ForestDnsZones,DC=my,DC=domain)
Repacking database from v1 to v2 format (first record CN=6ada9ff7-c9df-45c1-908e-9fef2fab008a,CN=Operations,CN=DomainUpdates,CN=System,DC=my,DC=domain)
INFO 2022-05-02 15:41:08,163 pid:48527 /usr/lib/python3/dist-packages/samba/join.py #1616: Setting isSynchronized and dsServiceName
INFO 2022-05-02 15:41:08,177 pid:48527 /usr/lib/python3/dist-packages/samba/join.py #1581: Cloned domain my (SID S-1-5-21-3270324153-1113196140-426135491)
resolve_lmhosts: Attempting lmhosts lookup for name dc01.my.domain<0x20>
INFO 2022-05-02 15:41:08,710 pid:48527 /usr/lib/python3/dist-packages/samba/netcmd/domain_backup.py #269: Backing up sysvol files (via SMB)...
lp_load_ex: refreshing parameters
Initialising global parameters
rlimit_max: increasing rlimit_max (1024) to minimum Windows limit (16384)
Processing section "[global]"  
Processing section "[sysvol]"  
Processing section "[netlogon]"  
Processing section "[1]"  
Processing section "[o]"  
Processing section "[p]"  
Processing section "[U]"  
Processing section "[C]"  
Processing section ""  
resolve_hosts: Attempting host lookup for name dc01.my.domain<0x20>
Connecting to 192.168.50.11 at port 445
convert_string_handle: E2BIG: convert_string(UTF-8,CP850): srclen=18 destlen=16 error: No more room
Connecting to 192.168.50.11 at port 139
ERROR(runtime): uncaught exception - (3221225653, '{Device Timeout} The specified I/O operation on %hs was not completed before the time-out period expired.')  
  File "/usr/lib/python3/dist-packages/samba/netcmd/__init__.py", line 186, in _run  
    return self.run(*args, **kwargs)
  File "/usr/lib/python3/dist-packages/samba/netcmd/domain_backup.py", line 272, in run  
    backup_online(smb_conn, sysvol_tar, remote_sam.get_domain_sid())
  File "/usr/lib/python3/dist-packages/samba/ntacls.py", line 522, in backup_online  
    data = smb_helper.loadfile(r_name)
  File "/usr/lib/python3/dist-packages/samba/ntacls.py", line 369, in loadfile  
    return self.smb_conn.loadfile(smb_path)