Re: Lots of con-current I/O = resets SATA link? (2.6.25.10)

From: Robert Hancock
Date: Sat Jul 05 2008 - 19:23:43 EST

Justin Piszcz wrote:
Can you post your dmesg from bootup with the controller/drive detection?

Below:

[ 0.889917] ahci 0000:00:1f.2: version 3.0
[ 0.889931] ACPI: PCI Interrupt 0000:00:1f.2[A] -> GSI 19 (level, low) -> IRQ 19
[ 1.890735] ahci 0000:00:1f.2: AHCI 0001.0100 32 slots 6 ports 3 Gbps 0x3f impl SATA mode
[ 1.890845] ahci 0000:00:1f.2: flags: 64bit ncq sntf led clo pio slum part [ 1.890940] PCI: Setting latency timer of device 0000:00:1f.2 to 64
[ 1.891185] scsi0 : ahci
[ 1.891310] scsi1 : ahci
[ 1.891419] scsi2 : ahci
[ 1.891527] scsi3 : ahci
[ 1.891806] scsi4 : ahci
[ 1.892805] scsi5 : ahci
[ 1.893844] ata1: SATA max UDMA/133 abar m2048@0xe0625000 port 0xe0625100 irq 378
[ 1.894714] ata2: SATA max UDMA/133 abar m2048@0xe0625000 port 0xe0625180 irq 378
[ 1.895713] ata3: SATA max UDMA/133 abar m2048@0xe0625000 port 0xe0625200 irq 378
[ 1.896713] ata4: SATA max UDMA/133 abar m2048@0xe0625000 port 0xe0625280 irq 378
[ 1.897723] ata5: SATA max UDMA/133 abar m2048@0xe0625000 port 0xe0625300 irq 378
[ 1.898713] ata6: SATA max UDMA/133 abar m2048@0xe0625000 port 0xe0625380 irq 378
[ 2.356649] ata1: SATA link up 3.0 Gbps (SStatus 123 SControl 300)
[ 2.673654] ata1.00: ATA-8: WDC WD3000GLFS-01F8U0, 03.03V01, max UDMA/133
[ 2.674595] ata1.00: 586072368 sectors, multi 0: LBA48 NCQ (depth 31/32)
[ 2.679961] ata1.00: configured for UDMA/133
[ 2.836575] ata2: SATA link up 3.0 Gbps (SStatus 123 SControl 300)
[ 3.155395] ata2.00: ATA-8: WDC WD3000GLFS-01F8U0, 03.03V01, max UDMA/133
[ 3.155521] ata2.00: 586072368 sectors, multi 0: LBA48 NCQ (depth 31/32)
[ 3.161112] ata2.00: configured for UDMA/133
[ 3.322501] ata3: SATA link up 3.0 Gbps (SStatus 123 SControl 300)
[ 3.633983] ata3.00: ATA-8: WDC WD3000GLFS-01F8U0, 03.03V01, max UDMA/133
[ 3.634449] ata3.00: 586072368 sectors, multi 0: LBA48 NCQ (depth 31/32)
[ 3.640394] ata3.00: configured for UDMA/133
[ 3.806428] ata4: SATA link up 3.0 Gbps (SStatus 123 SControl 300)
[ 4.112403] ata4.00: ATA-8: WDC WD3000GLFS-01F8U0, 03.03V01, max UDMA/133
[ 4.113376] ata4.00: 586072368 sectors, multi 0: LBA48 NCQ (depth 31/32)
[ 4.119137] ata4.00: configured for UDMA/133
[ 4.397339] ata5: SATA link up 3.0 Gbps (SStatus 123 SControl 300)
[ 4.591563] ata5.00: ATA-8: WDC WD3000GLFS-01F8U0, 03.03V01, max UDMA/133
[ 4.592303] ata5.00: 586072368 sectors, multi 0: LBA48 NCQ (depth 31/32)
[ 4.598246] ata5.00: configured for UDMA/133
[ 4.881265] ata6: SATA link up 3.0 Gbps (SStatus 123 SControl 300)
[ 5.069692] ata6.00: ATA-8: WDC WD3000GLFS-01F8U0, 03.03V01, max UDMA/133
[ 5.070230] ata6.00: 586072368 sectors, multi 0: LBA48 NCQ (depth 31/32)
[ 5.076402] ata6.00: configured for UDMA/133

So you've got 6 drives in the machine. Intel chipsets normally seem pretty robust with AHCI.

[107360.796671] ata4.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x2 frozen
[107360.796680] ata4.00: cmd b0/d8:00:00:4f:c2/00:00:00:00:00/00 tag 0
[107360.796681] res 40/00:ff:00:00:00/00:00:00:00:00/00 Emask 0x4 (timeout)
[107360.796685] ata4.00: status: { DRDY }
[107361.099615] ata4: soft resetting link
[107361.252599] ata4: SATA link up 3.0 Gbps (SStatus 123 SControl 300)
[107361.273562] ata4.00: configured for UDMA/133
[107361.273604] ata4: EH complete
[107361.018520] sd 3:0:0:0: [sdd] 586072368 512-byte hardware sectors (300069 MB)
[107361.018683] sd 3:0:0:0: [sdd] Write Protect is off
[107361.018687] sd 3:0:0:0: [sdd] Mode Sense: 00 3a 00 00
[107361.040887] sd 3:0:0:0: [sdd] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA

Are you certain that your machine has enough power to run all those drives properly? We've seen in a number of cases that power fluctuations or noise can cause these kinds of errors.
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