Disk space fell below 20GB (30 min of data taking). I switched on writing to adaql1 also. Filesystem Size Used Avail Use% Mounted on /dev/md10 135G 123G 5.1G 97% /adaql2/data1 /dev/md11 135G 125G 3.5G 98% /adaql2/data2 /dev/md12 135G 124G 4.4G 97% /adaql2/data3 /dev/md13 135G 124G 4.2G 97% /adaql2/data4