Hi, I'm doing a speed test on a 3TB disk with 19 GPT partitions, and got a full system crash. Keyboard not responding (Uppercase LED does not light when the appropriate key is pressed), machine stops responding to ping. This happened twice, and only when the partition is reiserfs (btrfs not tested yet). The test is this: I format all the 19 partitions as XFS (150 GiB each), then write on each partition 3 files of 4 GiB with this code: dd if=/dev/zero of=/mnt/test/fichero_$X count=20 bs=100M conv=fdatasync which I time and record on a file on another disk. Then I delete those files, and create 3000 files of 1 MB each, with this code: NUMFICPEQ=3000 SECS1=`date +%s` for Z in `seq 1 $NUMFICPEQ`; do dd if=/dev/zero of=/mnt/test/fichero_$Z count=1 bs=1M conv=fdatasync >> Detailedlogfile 2>&1. done SECS2=`date +%s` DIFF=`expr $SECS2 - $SECS1` echo echo "==== Written $NUMFICPEQ ficheros in $DIFF seconds (Part $X)" | tee -a sometextfile The test is repeated 3 times for the 19 partitions. Then I reformat them all as reiserfs, and repeat all the above. The formatting is done with: mkfs.reiserfs -l speed_$X -q $DISK$X 2>&1 | tee -a registro_particionado.txt The first crash happened on partition number 10, first iteration. I verified the partition, added code to the dd line to log the output, and repeated. Second crash happened on partition 14, second loop. The output from dd was: Salida de los miles de 'dd' del test ficheros pequeños 1+0 records in 1+0 records out 1048576 bytes (1.0 MB) copied, 0.0228002 s, 46.0 MB/s 1+0 records in 1+0 records out 1048576 bytes (1.0 MB) copied, 0.0546576 s, 19.2 MB/s 1+0 records in 1+0 records out 1048576 bytes (1.0 MB) copied, 0.0569717 s, 18.4 MB/s thousands more, then: 1048576 bytes (1.0 MB) copied, 0.0491611 s, 21.3 MB/s ...................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... ..................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... ..................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... ....................................................................................................................................................................................................................................................... and no more was logged. 2519 files were written (according to the log), yet the directory is empty now. I have done the testing with xfs and ext4 with no problem, except with reiserfs, that crashed twice. The second time on runlevel 3, so no graphic driver loaded yet. -- Cheers / Saludos, Carlos E. R. (from 13.1 x86_64 "Bottle" at Telcontar)