Failed to restore a subscription in Plesk: Transport error: Failed to write to the file. Check free disk space on the system

Symptoms

Unable to restore a subscription in Plesk from an external backup:

PLESK_ERROR: Unable to import the file as dump: pmm-ras failed (Error code = 1): Transport error: Failed to write to the file. Check free disk space on the system

Cause

Insufficient disk space in the directory where backups are downloaded to.

Resolution

1. Connect to the server via SSH

2. Check for the temporary dump directory’s path:

   # grep ^DUMP_TMP_D /etc/psa/psa.conf
   DUMP_TMP_D /tmp

3. Check the disk space occupied:

   # df -h /tmp
   Filesystem Size Used Avail Use% Mounted on
   /dev/sda1 59.8G 59.8G 0 100% /

4. Find the files that occupy a lot of space and remove them:
   How to find directories/files that take up the most disk space on a Plesk for Linux server