I'm seeing errors in dmesg and the like. It appears to be somewhat similar to the issue reported here: http://kerneltrap.org/mailarchive/linux-kernel/2007/8/25/164711 except that my machine doesn't freeze, and everything seems normal -- hopefully nothing like silent corruption is going on. Also it's on brand new hardware...Intel ICH8 mobile chipset with AHCI. Output from dmesg, hdparm -I /dev/sda and hdparm --drq-hsm-error /dev/sda is below...please let me know if there's anything else that would be of use (and, of course, if this is something I should be worried about :-) ). Thanks. Jeff dmesg: ata1.00: exception Emask 0x2 SAct 0xfffd SErr 0x0 action 0x2 frozen ata1.00: spurious completions during NCQ issue=0x1 SAct=0xfffd FIS=005040a1:00000002 ata1.00: cmd 61/08:00:56:4c:d4/00:00:01:00:00/40 tag 0 cdb 0x0 data 4096 out res 50/00:08:46:4c:d4/00:00:01:00:00/40 Emask 0x2 (HSM violation) ata1.00: cmd 61/08:10:a6:fb:c5/00:00:01:00:00/40 tag 2 cdb 0x0 data 4096 out res 50/00:08:46:4c:d4/00:00:01:00:00/40 Emask 0x2 (HSM violation) ata1.00: cmd 61/08:18:fe:00:c8/00:00:01:00:00/40 tag 3 cdb 0x0 data 4096 out res 50/00:08:46:4c:d4/00:00:01:00:00/40 Emask 0x2 (HSM violation) ata1.00: cmd 61/08:20:be:e5:cf/00:00:01:00:00/40 tag 4 cdb 0x0 data 4096 out res 50/00:08:46:4c:d4/00:00:01:00:00/40 Emask 0x2 (HSM violation) ata1.00: cmd 61/08:28:46:f6:cf/00:00:01:00:00/40 tag 5 cdb 0x0 data 4096 out res 50/00:08:46:4c:d4/00:00:01:00:00/40 Emask 0x2 (HSM violation) ata1.00: cmd 61/08:30:96:ef:d3/00:00:01:00:00/40 tag 6 cdb 0x0 data 4096 out res 50/00:08:46:4c:d4/00:00:01:00:00/40 Emask 0x2 (HSM violation) ata1.00: cmd 61/08:38:b6:ef:d3/00:00:01:00:00/40 tag 7 cdb 0x0 data 4096 out res 50/00:08:46:4c:d4/00:00:01:00:00/40 Emask 0x2 (HSM violation) ata1.00: cmd 61/08:40:e6:ef:d3/00:00:01:00:00/40 tag 8 cdb 0x0 data 4096 out res 50/00:08:46:4c:d4/00:00:01:00:00/40 Emask 0x2 (HSM violation) ata1.00: cmd 61/18:48:f6:ef:d3/00:00:01:00:00/40 tag 9 cdb 0x0 data 12288 out res 50/00:08:46:4c:d4/00:00:01:00:00/40 Emask 0x2 (HSM violation) ata1.00: cmd 61/08:50:86:02:d4/00:00:01:00:00/40 tag 10 cdb 0x0 data 4096 out res 50/00:08:46:4c:d4/00:00:01:00:00/40 Emask 0x2 (HSM violation) ata1.00: cmd 61/08:58:a6:4b:d4/00:00:01:00:00/40 tag 11 cdb 0x0 data 4096 out res 50/00:08:46:4c:d4/00:00:01:00:00/40 Emask 0x2 (HSM violation) ata1.00: cmd 61/10:60:ae:4b:d4/00:00:01:00:00/40 tag 12 cdb 0x0 data 8192 out res 50/00:08:46:4c:d4/00:00:01:00:00/40 Emask 0x2 (HSM violation) ata1.00: cmd 61/10:68:d6:4b:d4/00:00:01:00:00/40 tag 13 cdb 0x0 data 8192 out res 50/00:08:46:4c:d4/00:00:01:00:00/40 Emask 0x2 (HSM violation) ata1.00: cmd 61/18:70:06:4c:d4/00:00:01:00:00/40 tag 14 cdb 0x0 data 12288 out res 50/00:08:46:4c:d4/00:00:01:00:00/40 Emask 0x2 (HSM violation) ata1.00: cmd 61/08:78:46:4c:d4/00:00:01:00:00/40 tag 15 cdb 0x0 data 4096 out res 50/00:08:46:4c:d4/00:00:01:00:00/40 Emask 0x2 (HSM violation) ata1: soft resetting port ata1: SATA link up 3.0 Gbps (SStatus 123 SControl 300) ata1.00: configured for UDMA/133 ata1: EH complete sd 0:0:0:0: [sda] 312581808 512-byte hardware sectors (160042 MB) sd 0:0:0:0: [sda] Write Protect is off sd 0:0:0:0: [sda] Mode Sense: 00 3a 00 00 sd 0:0:0:0: [sda] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA hdparm -I /dev/sda: /dev/sda: ATA device, with non-removable media Model Number: Hitachi HTS722016K9A300 Serial Number: 071014DP1D10DFG5A80P Firmware Revision: DCDOC54P Transport: Serial, ATA8-AST, SATA 1.0a, SATA II Extensions, SATA Rev 2.5; Revision: ATA8-AST T13 Project D1697 Revision 0b Standards: Supported: 8 7 6 5 Likely used: 8 Configuration: Logical max current cylinders 16383 16383 heads 16 16 sectors/track 63 63 -- CHS current addressable sectors: 16514064 LBA user addressable sectors: 268435455 LBA48 user addressable sectors: 312581808 device size with M = 1024*1024: 152627 MBytes device size with M = 1000*1000: 160041 MBytes (160 GB) Capabilities: LBA, IORDY(can be disabled) Queue depth: 32 Standby timer values: spec'd by Vendor, no device specific minimum R/W multiple sector transfer: Max = 16 Current = 8 Advanced power management level: 128 (0x80) Recommended acoustic management value: 128, current value: 128 DMA: mdma0 mdma1 mdma2 udma0 udma1 udma2 udma3 udma4 udma5 *udma6 Cycle time: min=120ns recommended=120ns PIO: pio0 pio1 pio2 pio3 pio4 Cycle time: no flow control=120ns IORDY flow control=120ns Commands/features: Enabled Supported: * SMART feature set Security Mode feature set * Power Management feature set * Write cache * Look-ahead * Host Protected Area feature set * WRITE_BUFFER command * READ_BUFFER command * NOP cmd * DOWNLOAD_MICROCODE * Advanced Power Management feature set Power-Up In Standby feature set * SET_FEATURES required to spinup after power up SET_MAX security extension * Automatic Acoustic Management feature set * 48-bit Address feature set * Device Configuration Overlay feature set * Mandatory FLUSH_CACHE * FLUSH_CACHE_EXT * SMART error logging * SMART self-test * General Purpose Logging feature set * WRITE_{DMA|MULTIPLE}_FUA_EXT * 64-bit World wide name * IDLE_IMMEDIATE with UNLOAD * WRITE_UNCORRECTABLE command * SATA-I signaling speed (1.5Gb/s) * SATA-II signaling speed (3.0Gb/s) * Native Command Queueing (NCQ) * Host-initiated interface power management * Phy event counters * unknown 76[12] Non-Zero buffer offsets in DMA Setup FIS DMA Setup Auto-Activate optimization Device-initiated interface power management In-order data delivery * Software settings preservation * SMART Command Transport (SCT) feature set * SCT LBA Segment Access (AC2) * SCT Error Recovery Control (AC3) * SCT Features Control (AC4) * SCT Data Tables (AC5) Security: Master password revision code = 65534 supported not enabled not locked frozen not expired: security count supported: enhanced erase 64min for SECURITY ERASE UNIT. 66min for ENHANCED SECURITY ERASE UNIT. Checksum: correct hdparm --drq-hsm-error /dev/sda: /dev/sda: triggering "stuck DRQ" host state machine error do_drq_hsm_error: Success ata status=0x40 ata error=0x00 - 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