I have tested this patch: http://user.it.uu.se/~mikpe/linux/patches/2.6/OLD/2.6.28/patch-sata_promise-reset-updates-v1-2.6.28 on a 2.6.31 kernel. It continues with the same errors as: { DRDY ERR }, { ICRC ABRT }, exception Emask 0x10 SAct 0x0 SErr 0x0 action 0x9 t4, link is slow to respond, gradually reducing UDMA/133 to UDMA/33, etc., with no apparent improvement. One thing of note is that it happens always on one drive, and not ever on the other. It never happens on happens on ST3500641AS Seagate esata 500GB. It always happens on WD My Book esata 500GB. I tried exchanging cables, and even reversing ports (including with fstab tweak from sda to sdb) to rule out the cable or the the controller port. I tried copying data the other way around and the WD still gave one group of errors, but writing triggers many more errors than reading. The problem follows the drive. The drive passes WD diagnostics and apparently functions fine except for the messages. The WD drive is a second RMA replacement for same model which gave same messages and I thought it was a problem. On kernel 2.6.18.8, the throughput to the WD drive is a little faster and the messages, which happen with the same frequency, are gentler. hdparm in case there is some clue: hdparm -I /dev/sda /dev/sda: ATA device, with non-removable media Model Number: ST3500641AS Serial Number: 3PM1C9S5 Firmware Revision: 3.AAE Standards: Supported: 7 6 5 4 Likely used: 7 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: 976773168 device size with M = 1024*1024: 476940 MBytes device size with M = 1000*1000: 500107 MBytes (500 GB) Capabilities: LBA, IORDY(can be disabled) Queue depth: 32 Standby timer values: spec'd by Standard, no device specific minimum R/W multiple sector transfer: Max = 16 Current = ? Recommended acoustic management value: 144, current value: 0 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=240ns 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 * DOWNLOAD_MICROCODE SET_MAX security extension * 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 * SATA-I signaling speed (1.5Gb/s) * SATA-II signaling speed (3.0Gb/s) * Native Command Queueing (NCQ) * Phy event counters * Software settings preservation Security: Master password revision code = 65534 supported not enabled not locked not frozen not expired: security count not supported: enhanced erase Checksum: correct hdparm -I /dev/sdb /dev/sdb: ATA device, with non-removable media Model Number: WD My Book ESOxford OEMF@J Serial Number: WD-WCAPW0367705 Firmware Revision: 012 Standards: Used: ATA/ATAPI-6 T13 1410D revision 1 Supported: 6 5 4 Configuration: Logical max current cylinders 16383 0 heads 16 0 sectors/track 63 0 -- LBA user addressable sectors: 268435455 LBA48 user addressable sectors: 976773168 device size with M = 1024*1024: 476940 MBytes device size with M = 1000*1000: 500107 MBytes (500 GB) Capabilities: LBA, IORDY(cannot be disabled) Standby timer values: spec'd by Vendor, with device specific minimum R/W multiple sector transfer: Max = 1 Current = 0 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 * Power Management feature set * Write cache * 48-bit Address feature set * Mandatory FLUSH_CACHE * FLUSH_CACHE_EXT * SMART self-test * WRITE_{DMA|MULTIPLE}_FUA_EXT * SATA-I signaling speed (1.5Gb/s) * SATA-II signaling speed (3.0Gb/s) Integrity word not set (found 0x0000, expected 0x51a5) -- 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
