PgBackRest fails due to filesystem full

List,

I am running PgbackRest-2.52.1 on RHEL9.3 and EDB16 to backup to a
remote repo server . Everything was working fine and backups were
regularly taken with cron scheduler daily.

But due to a / partition full 100 % utilization, the pgbackrest backup
failed the other day. I came to know the backup script is not working for
the backup which is scheduled daily from a cron scheduler. I made space
in / file system by removing few log files from
/var/pgbackrest/DBCluster1

I tried to reschedule the backup script (after deleting some log files
from /var and now / is having 50 % free space ) but after running for 2 or
3 minutes pgbackrest fails as follows.

[root(at)dbtest log]# sudo -u postgres pgbackrest --stanza=DBCluster1_Repo
--type=full backup
2025-04-07 14:29:36.171 P00 INFO: backup command begin 2.52.1: --delta
--exec-id=4175219-0893aa9e --log-level-console=info --log-level-file=debug
--pg1-host=10.x.0.y --pg1-host-user=enterprisedb
--pg1-path=/data/edb/as16/data --pg-version-force=16 --process-max=5
--repo1-block --repo1-bundle --repo1-cipher-pass=<redacted>
--repo1-cipher-type=aes-256-cbc --repo1-path=/data/DB_BKUPS
--repo1-retention-diff=6 --repo1-retention-full=3
--stanza=DBCluster1_Repo --start-fast --type=full
2025-04-07 14:29:40.007 P00 INFO: execute non-exclusive backup start:
backup begins after the requested immediate checkpoint completes
2025-04-07 14:29:41.383 P00 INFO: backup start archive =
00000001000001EB0000004C, lsn = 1EB/4C0003D8
2025-04-07 14:29:41.383 P00 INFO: check archive for prior segment
00000001000001EB0000004B
*ERROR: [082]: WAL segment 00000001000001EB000000*4B was not archived
before the 60000ms timeout
HINT: check the archive_command to ensure that all options are
correct (especially --stanza).
HINT: check the PostgreSQL server log for errors.
HINT: run the 'start' command if the stanza was previously stopped.

*Again I ran the backup script but each time it fails with error (each time
the WAL segment error with a new WAL segment number ) *

2025-04-07 14:30:41.383 P00 INFO: backup command end: aborted with
exception [082]

2025-04-07 14:33:03.382 P00 INFO: check archive for prior segment
00000001000001EB0000004D
ERROR: [082]: WAL segment 00000001000001EB0000004D was not archived before
the 60000ms timeout
HINT: check the archive_command to ensure that all options are
correct (especially --stanza).
HINT: check the PostgreSQL server log for errors.
HINT: run the 'start' command if the stanza was previously stopped.

2025-04-07 14:34:03.382 P00 INFO: backup command end: aborted with
exception [082]

This may be due to the WAL segment from the DB server being unable to
sync that time when the file system was full at the Repo Server side which
was observed by me after 2 days !!

Any hints how can I rectify this issue and put pgbackrest working back ??

How can I enforce the consistency of the Backups and WAL files since
there may be missing WAL files in between when the RepoServer file system
is full ?

Thanks in advance
Krishane