From: https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=245512 The following error consistently appears at apparently random intervals in syslog: kernel: ata1.00: exception Emask 0x2 SAct 0x1001 SErr 0x0 action 0x2 frozen kernel: ata1.00: (spurious completions during NCQ issue=0x0 SAct=0x1001 FIS=004040a1:00000800) kernel: ata1.00: cmd 61/08:00:39:2b:cc/00:00:08:00:00/40 tag 0 cdb 0x0 data 4096 out kernel: res 40/00:00:39:2b:cc/00:00:08:00:00/40 Emask 0x2 (HSM violation) kernel: ata1.00: cmd 61/08:60:e1:2b:cc/00:00:08:00:00/40 tag 12 cdb 0x0 data 4096 out kernel: res 40/00:00:39:2b:cc/00:00:08:00:00/40 Emask 0x2 (HSM violation) Controller is ATI SB600 using the AHCI driver. 64-bit DMA is disabled. Disk is: ata1.00: ATA-7: ST3160812AS, 3.ADJ, max UDMA/133 Can't we just turn off NCQ automatically when this happens? - To unsubscribe from this list: send the line "unsubscribe linux-ide" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
