Hi, Since I have upgraded to 2.6.22.1 from 2.6.20 I have problems with Samsung disks. Sometimes the disks stall for about half a minute and then I have these messages in the logs: Aug 6 20:10:11 twister kernel: ata7: EH in ADMA mode, notifier 0x0 notifier_error 0x0 gen_ctl 0x1501000 status 0x400 next cpb count 0x0 next cpb idx 0x0 Aug 6 20:10:12 twister kernel: ata7: CPB 0: ctl_flags 0x9, resp_flags 0x0 Aug 6 20:10:12 twister kernel: ata7: timeout waiting for ADMA IDLE, stat=0x400 Aug 6 20:10:12 twister kernel: ata7: timeout waiting for ADMA LEGACY, stat=0x400 Aug 6 20:10:12 twister kernel: ata7.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x2 frozen Aug 6 20:10:12 twister kernel: ata7.00: cmd ea/00:00:00:00:00/00:00:00:00:00/a0 tag 0 cdb 0x0 data 0 Aug 6 20:10:12 twister kernel: res 40/00:00:00:4f:c2/00:00:00:00:00/00 Emask 0x4 (timeout) Aug 6 20:10:12 twister kernel: ata7: soft resetting port Aug 6 20:10:12 twister kernel: ata7: SATA link up 3.0 Gbps (SStatus 123 SControl 300) Aug 6 20:10:12 twister kernel: ata7.00: configured for UDMA/133 Aug 6 20:10:12 twister kernel: ata7: EH complete Aug 6 20:10:12 twister kernel: sd 6:0:0:0: [sdc] 488397168 512-byte hardware sectors (250059 MB) Aug 6 20:10:12 twister kernel: sd 6:0:0:0: [sdc] Write Protect is off Aug 6 20:10:12 twister kernel: sd 6:0:0:0: [sdc] Mode Sense: 00 3a 00 00 Aug 6 20:10:12 twister kernel: sd 6:0:0:0: [sdc] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA Aug 6 20:20:25 twister kernel: ata8: EH in ADMA mode, notifier 0x0 notifier_error 0x0 gen_ctl 0x1501000 status 0x400 next cpb count 0x0 next cpb idx 0x0 Aug 6 20:20:25 twister kernel: ata8: CPB 0: ctl_flags 0x9, resp_flags 0x0 Aug 6 20:20:25 twister kernel: ata8: timeout waiting for ADMA IDLE, stat=0x400 Aug 6 20:20:25 twister kernel: ata8: timeout waiting for ADMA LEGACY, stat=0x400 Aug 6 20:20:25 twister kernel: ata8.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x2 frozen Aug 6 20:20:25 twister kernel: ata8.00: cmd ea/00:00:00:00:00/00:00:00:00:00/a0 tag 0 cdb 0x0 data 0 Aug 6 20:20:25 twister kernel: res 40/00:00:00:4f:c2/00:00:00:00:00/00 Emask 0x4 (timeout) Aug 6 20:20:25 twister kernel: ata8: soft resetting port Aug 6 20:20:25 twister kernel: ata8: SATA link up 3.0 Gbps (SStatus 123 SControl 300) Aug 6 20:20:25 twister kernel: ata8.00: configured for UDMA/133 Aug 6 20:20:25 twister kernel: ata8: EH complete Aug 6 20:20:25 twister kernel: sd 7:0:0:0: [sdd] 488397168 512-byte hardware sectors (250059 MB) Aug 6 20:20:25 twister kernel: sd 7:0:0:0: [sdd] Write Protect is off Aug 6 20:20:25 twister kernel: sd 7:0:0:0: [sdd] Mode Sense: 00 3a 00 00 Aug 6 20:20:25 twister kernel: sd 7:0:0:0: [sdd] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA I also have two Maxtor disks on the same controller but they are working correctly in ADMA mode. I now disabled ADMA mode and that seems to help. hdparm -I output for the misbehaving disks (they're identical): /dev/sdc: ATA device, with non-removable media Model Number: SAMSUNG SP2504C Serial Number: XXXXXXXXXXXXXX Firmware Revision: VT100-33 Standards: Used: ATA/ATAPI-7 T13 1532D revision 4a Supported: 7 6 5 4 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: 488397168 device size with M = 1024*1024: 238475 MBytes device size with M = 1000*1000: 250059 MBytes (250 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 = 16 Recommended acoustic management value: 254, current value: 128 DMA: mdma0 mdma1 mdma2 udma0 udma1 udma2 udma3 udma4 udma5 *udma6 udma7 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 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 * 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 DMA Setup Auto-Activate optimization Device-initiated interface power management * Software settings preservation Security: Master password revision code = 65534 supported not enabled not locked frozen not expired: security count supported: enhanced erase 120min for SECURITY ERASE UNIT. 120min for ENHANCED SECURITY ERASE UNIT. Checksum: correct sata_nv related dmesg excerpt: sata_nv 0000:00:07.0: version 3.4 ACPI: PCI Interrupt Link [APSI] enabled at IRQ 23 ACPI: PCI Interrupt 0000:00:07.0[A] -> Link [APSI] -> GSI 23 (level, low) -> IRQ 23 sata_nv 0000:00:07.0: Using ADMA mode PCI: Setting latency timer of device 0000:00:07.0 to 64 scsi4 : sata_nv scsi5 : sata_nv ata5: SATA max UDMA/133 cmd 0xffffc2000000c480 ctl 0xffffc2000000c4a0 bmdma 0x000000000001c800 irq 23 ata6: SATA max UDMA/133 cmd 0xffffc2000000c580 ctl 0xffffc2000000c5a0 bmdma 0x000000000001c808 irq 23 ata5: SATA link up 1.5 Gbps (SStatus 113 SControl 300) ata5.00: ATA-7: Maxtor 6B250S0, BANC1G10, max UDMA/133 ata5.00: 490234752 sectors, multi 16: LBA48 NCQ (depth 31/32) ata5.00: configured for UDMA/133 ata6: SATA link up 1.5 Gbps (SStatus 113 SControl 300) ata6.00: ATA-7: Maxtor 6B250S0, BANC1G10, max UDMA/133 ata6.00: 490234752 sectors, multi 16: LBA48 NCQ (depth 31/32) ata6.00: configured for UDMA/133 scsi 4:0:0:0: Direct-Access ATA Maxtor 6B250S0 BANC PQ: 0 ANSI: 5 ata5: bounce limit 0xFFFFFFFFFFFFFFFF, segment boundary 0xFFFFFFFF, hw segs 61 sd 4:0:0:0: [sda] 490234752 512-byte hardware sectors (251000 MB) sd 4:0:0:0: [sda] Write Protect is off sd 4:0:0:0: [sda] Mode Sense: 00 3a 00 00 sd 4:0:0:0: [sda] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA sd 4:0:0:0: [sda] 490234752 512-byte hardware sectors (251000 MB) sd 4:0:0:0: [sda] Write Protect is off sd 4:0:0:0: [sda] Mode Sense: 00 3a 00 00 sd 4:0:0:0: [sda] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA sda: sda1 sda2 < sda5 sda6 sda7 sda8 > sd 4:0:0:0: [sda] Attached SCSI disk scsi 5:0:0:0: Direct-Access ATA Maxtor 6B250S0 BANC PQ: 0 ANSI: 5 ata6: bounce limit 0xFFFFFFFFFFFFFFFF, segment boundary 0xFFFFFFFF, hw segs 61 sd 5:0:0:0: [sdb] 490234752 512-byte hardware sectors (251000 MB) sd 5:0:0:0: [sdb] Write Protect is off sd 5:0:0:0: [sdb] Mode Sense: 00 3a 00 00 sd 5:0:0:0: [sdb] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA sd 5:0:0:0: [sdb] 490234752 512-byte hardware sectors (251000 MB) sd 5:0:0:0: [sdb] Write Protect is off sd 5:0:0:0: [sdb] Mode Sense: 00 3a 00 00 sd 5:0:0:0: [sdb] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA sdb: sdb1 sdb2 < sdb5 sdb6 sdb7 sdb8 > sd 5:0:0:0: [sdb] Attached SCSI disk ACPI: PCI Interrupt Link [APSJ] enabled at IRQ 22 ACPI: PCI Interrupt 0000:00:08.0[A] -> Link [APSJ] -> GSI 22 (level, low) -> IRQ 22 sata_nv 0000:00:08.0: Using ADMA mode PCI: Setting latency timer of device 0000:00:08.0 to 64 scsi6 : sata_nv scsi7 : sata_nv ata7: SATA max UDMA/133 cmd 0xffffc2000000e480 ctl 0xffffc2000000e4a0 bmdma 0x000000000001dc00 irq 22 ata8: SATA max UDMA/133 cmd 0xffffc2000000e580 ctl 0xffffc2000000e5a0 bmdma 0x000000000001dc08 irq 22 ata7: SATA link up 3.0 Gbps (SStatus 123 SControl 300) ata7.00: ATA-7: SAMSUNG SP2504C, VT100-33, max UDMA7 ata7.00: 488397168 sectors, multi 16: LBA48 NCQ (depth 31/32) ata7.00: configured for UDMA/133 ata8: SATA link up 3.0 Gbps (SStatus 123 SControl 300) ata8.00: ATA-7: SAMSUNG SP2504C, VT100-33, max UDMA7 ata8.00: 488397168 sectors, multi 16: LBA48 NCQ (depth 31/32) ata8.00: configured for UDMA/133 scsi 6:0:0:0: Direct-Access ATA SAMSUNG SP2504C VT10 PQ: 0 ANSI: 5 ata7: bounce limit 0xFFFFFFFFFFFFFFFF, segment boundary 0xFFFFFFFF, hw segs 61 sd 6:0:0:0: [sdc] 488397168 512-byte hardware sectors (250059 MB) sd 6:0:0:0: [sdc] Write Protect is off sd 6:0:0:0: [sdc] Mode Sense: 00 3a 00 00 sd 6:0:0:0: [sdc] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA sd 6:0:0:0: [sdc] 488397168 512-byte hardware sectors (250059 MB) sd 6:0:0:0: [sdc] Write Protect is off sd 6:0:0:0: [sdc] Mode Sense: 00 3a 00 00 sd 6:0:0:0: [sdc] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA sdc: sdc1 sdc2 < sdc5 sdc6 sdc7 sdc8 > sd 6:0:0:0: [sdc] Attached SCSI disk scsi 7:0:0:0: Direct-Access ATA SAMSUNG SP2504C VT10 PQ: 0 ANSI: 5 ata8: bounce limit 0xFFFFFFFFFFFFFFFF, segment boundary 0xFFFFFFFF, hw segs 61 sd 7:0:0:0: [sdd] 488397168 512-byte hardware sectors (250059 MB) sd 7:0:0:0: [sdd] Write Protect is off sd 7:0:0:0: [sdd] Mode Sense: 00 3a 00 00 sd 7:0:0:0: [sdd] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA sd 7:0:0:0: [sdd] 488397168 512-byte hardware sectors (250059 MB) sd 7:0:0:0: [sdd] Write Protect is off sd 7:0:0:0: [sdd] Mode Sense: 00 3a 00 00 sd 7:0:0:0: [sdd] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA sdd: sdd1 sdd2 < sdd5 sdd6 sdd7 sdd8 > sd 7:0:0:0: [sdd] Attached SCSI disk The controller in question is 00:07.0 IDE interface [0101]: nVidia Corporation CK804 Serial ATA Controller [10de:0054] (rev f3) (prog-if 85 [Master SecO PriO]) 00:08.0 IDE interface [0101]: nVidia Corporation CK804 Serial ATA Controller [10de:0055] (rev f3) (prog-if 85 [Master SecO PriO]) Gabor -- --------------------------------------------------------- MTA SZTAKI Computer and Automation Research Institute Hungarian Academy of Sciences --------------------------------------------------------- - 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