How to debug this? This issue has suddenly appeared within the last couple of days. All backups of a website are corrupted.
If the backup is just left as tar
, there are no problems, but as soon the tar is compressed as gz
or xz
I can't uncompress them.
There is a lot of free disk
Local disk space 2.68 TB total / 2.26 TB free / 432.46 GB used
error
tar: Skipping to next header[===============================> ] 39% ETA 0:01:14
tar: A lone zero block at 2291466===============================> ] 44% ETA 0:01:13
tar: Exiting with failure status due to previous errors
878MiB 0:00:58 [15.1MiB/s] [===================================> ] 44%
And why does it say Skipping to next header
? It has never done that before. Something is terribly wrong the some of the files.
There are about 15k pdf, jpg or png files in the directories.
command
pv $backup_file | tar -izxf - -C $import_dir
There must be some data that corrupts the compression.
I have also tried to check the HDD health by doing this:
# getting the drives
lsblk -dpno name
smartctl -H /dev/sda
smartctl -H /dev/sdb
On both drives I get this:
=== START OF READ SMART DATA SECTION ===
SMART overall-health self-assessment test result: PASSED
How can I find out which files that are corrupting the tar.gz? I just want to delete them.
update
Have now copied all files to another server and I have the exact same issue. I can tar everything and extract it without problems, but as soon I want to compress the files, I can't uncompress them (gz/xz).
tar -cf xxx.tar ...
without the compression, thengzip xxx.tar
? Does that tarball extract cleanly? Ispv
causing problems? What happens if you drop thepv ... | ...
piping and just directly runtar -cvzf xxx.tar.gz ...
thentar -xvzf xxx.tar ...
?pv
.