SYMPTOMS
Backup from Plesk CP fails with the error:"Unable to create backup session: Specified file is not accessible"
If "display_errors" is enabled in /usr/local/psa/admin/conf/httpsd.conf the following warning also appears:
readlink() [function.readlink]: Permission denied in
/usr/local/psa/admin/plib/PMM/MigrationDemon.php on line 134
RESOLUTION
Make sure that /var/lib/psa/dumps/tmp directory has the "psaadm" owner and group:# ls -dl /var/lib/psa/dumps/tmp
drwx------ 3 psaadm psaadm 2048 Jun 6 05:23 /var/lib/psa/dumps/tmp If not, change it with:
chown psaadm:psaadm /var/lib/psa/dumps/tmp