All, Having just installed F19 on a new mcahine, the disc keeps makeing 'reset' noises and puts this in /var/log/messages: Jul 30 18:58:38 brush kernel: [ 3538.326082] ata4.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x6 frozen Jul 30 18:58:38 brush kernel: [ 3538.326098] sr 3:0:0:0: CDB: Jul 30 18:58:38 brush kernel: [ 3538.326102] Get event status notification: 4a 01 00 00 10 00 00 00 08 00 Jul 30 18:58:38 brush kernel: [ 3538.326123] ata4.00: cmd a0/00:00:00:08:00/00:00:00:00:00/a0 tag 0 pio 16392 in Jul 30 18:58:38 brush kernel: [ 3538.326123] res 40/00:03:00:00:00/00:00:00:00:00/a0 Emask 0x4 (timeout) Jul 30 18:58:38 brush kernel: [ 3538.326129] ata4.00: status: { DRDY } Jul 30 18:58:38 brush kernel: [ 3538.326139] ata4: hard resetting link Jul 30 18:58:38 brush kernel: [ 3538.989992] ata4: SATA link up 1.5 Gbps (SStatus 113 SControl 310) Jul 30 18:58:38 brush kernel: [ 3539.007104] ata4.00: configured for PIO0 Jul 30 18:58:38 brush kernel: [ 3539.022994] ata4: EH complete This happens about every 30 seconds. Any idea what is going on? Jonathan