linux-kernel - Re: ATA Bus Error with ICH7R and WDC WD7500AAKS-0

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Message-id: <47F457CE.9050304@shaw.ca>
Date:	Wed, 02 Apr 2008 22:06:38 -0600
From:	Robert Hancock <hancockr@...w.ca>
To:	Chaitanya Huilgol <chaitanya@...aldata.com>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: ATA Bus Error with ICH7R and WDC WD7500AAKS-0

Chaitanya Huilgol wrote:
> 
> Hi,
> 
> I am getting frequent 'ATA bus error' with ICH7R & WD7500AAKS-0.
> I have tried the following combinations of NCQ and Write Cache disabled,
> Write I/O is done with dd:
> dd if=/dev/zero of=/dev/sdc bs=1048576
> 
> (1) With Write Cache is Disabled and NCQ is enabled then the
> errors are seen immediately on starting I/O
> (2) With Write Cache enabled and NCQ enabled the errors are less frequent
> (3) With NCQ disabled using "echo 1 >/sys/block/sdc/device/queue_depth"
> the errors are rare but do occur.
> 
> I have tried with different SATA Cables & Sata port combinations to
> rule out cable/bad port issues.
> 
> I am wondering if the WDC WD7500AAKS-0 is another candidate for NCQ 
> blacklist?
> 
> 
> Configuration Details:
> ------------------------
> 
> MotherBoard: S975XBX2
> AHCI controller: ICH7R
> 
> Kernel     version:        2.6.21.1
> ahci.ko    version:        2.1
> libata.ko  version:        2.20
> 
> Relevant dmesg output:
> -------------------------
> ata3: SATA max UDMA/133 cmd 0xf8822200 ctl 0x00000000 bmdma 0x00000000 
> irq 220
> ata3: SATA link up 3.0 Gbps (SStatus 123 SControl 300)
> ata3.00: ATA-7: WDC WD7500AAKS-00RBA0, 30.04G30, max UDMA/133
> ata3.00: 1465149168 sectors, multi 0: LBA48 NCQ (depth 31/32)
> ata3.00: configured for UDMA/133
> scsi3 : ahci
> scsi 2:0:0:0: Direct-Access     ATA      WDC WD7500AAKS-0 30.0 PQ: 0 
> ANSI: 5
> SCSI device sdc: 1465149168 512-byte hdwr sectors (750156 MB)
> sdc: Write Protect is off
> sdc: Mode Sense: 00 3a 00 00
> SCSI device sdc: write cache: enabled, read cache: enabled, doesn't 
> support DPO or FUA
> SCSI device sdc: 1465149168 512-byte hdwr sectors (750156 MB)
> sdc: Write Protect is off
> sdc: Mode Sense: 00 3a 00 00
> SCSI device sdc: write cache: enabled, read cache: enabled, doesn't 
> support DPO or FUA
> 
> ata3.00: exception Emask 0x10 SAct 0x7fffffff SErr 0x810000 action 0x2 
> frozen
> ata3.00: (irq_stat 0x08400000, interface fatal error, PHY RDY changed)
> ata3.00: cmd 61/00:00:78:96:fd/04:00:00:00:00/40 tag 0 cdb 0x0 data 
> 524288 out
>          res 40/00:cc:78:06:fe/00:00:00:00:00/40 Emask 0x10 (ATA bus error)
> ata3.00: cmd 61/00:08:78:9a:fd/04:00:00:00:00/40 tag 1 cdb 0x0 data 
> 524288 out
>          res 40/00:cc:78:06:fe/00:00:00:00:00/40 Emask 0x10 (ATA bus error)
> ata3.00: cmd 61/00:10:78:aa:fd/04:00:00:00:00/40 tag 2 cdb 0x0 data 
> 524288 out
>          res 40/00:cc:78:06:fe/00:00:00:00:00/40 Emask 0x10 (ATA bus error)
> ata3.00: cmd 61/00:18:78:ae:fd/04:00:00:00:00/40 tag 3 cdb 0x0 data 
> 524288 out
>          res 40/00:cc:78:06:fe/00:00:00:00:00/40 Emask 0x10 (ATA bus error)
> ata3.00: cmd 61/00:20:78:b2:fd/04:00:00:00:00/40 tag 4 cdb 0x0 data 
> 524288 out
>          res 40/00:cc:78:06:fe/00:00:00:00:00/40 Emask 0x10 (ATA bus error)
> ata3.00: cmd 61/00:28:78:b6:fd/04:00:00:00:00/40 tag 5 cdb 0x0 data 
> 524288 out
>     res 40/00:cc:78:06:fe/00:00:00:00:00/40 Emask 0x10 (ATA bus error)
> ata3.00: cmd 61/00:30:78:ba:fd/04:00:00:00:00/40 tag 6 cdb 0x0 data 
> 524288 out
>          res 40/00:cc:78:06:fe/00:00:00:00:00/40 Emask 0x10 (ATA bus error)
> ata3.00: cmd 61/00:38:78:be:fd/04:00:00:00:00/40 tag 7 cdb 0x0 data 
> 524288 out
>          res 40/00:cc:78:06:fe/00:00:00:00:00/40 Emask 0x10 (ATA bus error)
> ata3.00: cmd 61/00:40:78:c2:fd/04:00:00:00:00/40 tag 8 cdb 0x0 data 
> 524288 out
>          res 40/00:cc:78:06:fe/00:00:00:00:00/40 Emask 0x10 (ATA bus error)
> ata3.00: cmd 61/00:48:78:c6:fd/04:00:00:00:00/40 tag 9 cdb 0x0 data 
> 524288 out
>          res 40/00:cc:78:06:fe/00:00:00:00:00/40 Emask 0x10 (ATA bus error)
> ata3.00: cmd 61/00:50:78:ca:fd/04:00:00:00:00/40 tag 10 cdb 0x0 data 
> 524288 out
>          res 40/00:cc:78:06:fe/00:00:00:00:00/40 Emask 0x10 (ATA bus error)
> ata3.00: cmd 61/00:58:78:ce:fd/04:00:00:00:00/40 tag 11 cdb 0x0 data 
> 524288 out
>          res 40/00:cc:78:06:fe/00:00:00:00:00/40 Emask 0x10 (ATA bus error)
> ata3.00: cmd 61/00:60:78:d2:fd/04:00:00:00:00/40 tag 12 cdb 0x0 data 
> 524288 out
>          res 40/00:cc:78:06:fe/00:00:00:00:00/40 Emask 0x10 (ATA bus error)
> ata3.00: cmd 61/00:68:78:d6:fd/04:00:00:00:00/40 tag 13 cdb 0x0 data 
> 524288 out
>          res 40/00:cc:78:06:fe/00:00:00:00:00/40 Emask 0x10 (ATA bus error)
> ata3.00: cmd 61/00:70:78:da:fd/04:00:00:00:00/40 tag 14 cdb 0x0 data 
> 524288 out
>          res 40/00:cc:78:06:fe/00:00:00:00:00/40 Emask 0x10 (ATA bus error)
> ata3.00: cmd 61/00:78:78:de:fd/04:00:00:00:00/40 tag 15 cdb 0x0 data 
> 524288 out
>          res 40/00:cc:78:06:fe/00:00:00:00:00/40 Emask 0x10 (ATA bus error)
> ata3.00: cmd 61/00:80:78:e2:fd/04:00:00:00:00/40 tag 16 cdb 0x0 data 
> 524288 out
>          res 40/00:cc:78:06:fe/00:00:00:00:00/40 Emask 0x10 (ATA bus error)
> ata3.00: cmd 61/00:88:78:e6:fd/04:00:00:00:00/40 tag 17 cdb 0x0 data 
> 524288 out
>          res 40/00:cc:78:06:fe/00:00:00:00:00/40 Emask 0x10 (ATA bus error)
> ata3.00: cmd 61/00:90:78:ea:fd/04:00:00:00:00/40 tag 18 cdb 0x0 data 
> 524288 out
>          res 40/00:cc:78:06:fe/00:00:00:00:00/40 Emask 0x10 (ATA bus error)
> ata3.00: cmd 61/00:98:78:ee:fd/04:00:00:00:00/40 tag 19 cdb 0x0 data 
> 524288 out
>          res 40/00:cc:78:06:fe/00:00:00:00:00/40 Emask 0x10 (ATA bus error)
> ata3.00: cmd 61/00:a0:78:f2:fd/04:00:00:00:00/40 tag 20 cdb 0x0 data 
> 524288 out
>          res 40/00:cc:78:06:fe/00:00:00:00:00/40 Emask 0x10 (ATA bus error)
> ata3.00: cmd 61/00:a8:78:f6:fd/04:00:00:00:00/40 tag 21 cdb 0x0 data 
> 524288 out
>          res 40/00:cc:78:06:fe/00:00:00:00:00/40 Emask 0x10 (ATA bus error)
> ata3.00: cmd 61/00:b0:78:fa:fd/04:00:00:00:00/40 tag 22 cdb 0x0 data 
> 524288 out
>          res 40/00:cc:78:06:fe/00:00:00:00:00/40 Emask 0x10 (ATA bus error)
> ata3.00: cmd 61/00:b8:78:fe:fd/04:00:00:00:00/40 tag 23 cdb 0x0 data 
> 524288 out
>          res 40/00:cc:78:06:fe/00:00:00:00:00/40 Emask 0x10 (ATA bus error)
> ata3.00: cmd 61/00:c0:78:02:fe/04:00:00:00:00/40 tag 24 cdb 0x0 data 
> 524288 out
>          res 40/00:cc:78:06:fe/00:00:00:00:00/40 Emask 0x10 (ATA bus error)
> ata3.00: cmd 61/00:c8:78:06:fe/04:00:00:00:00/40 tag 25 cdb 0x0 data 
> 524288 out
>          res 40/00:cc:78:06:fe/00:00:00:00:00/40 Emask 0x10 (ATA bus error)
> ata3.00: cmd 61/00:d0:78:0a:fe/04:00:00:00:00/40 tag 26 cdb 0x0 data 
> 524288 out
>          res 40/00:cc:78:06:fe/00:00:00:00:00/40 Emask 0x10 (ATA bus error)
> ata3.00: cmd 61/00:d8:78:92:fd/04:00:00:00:00/40 tag 27 cdb 0x0 data 
> 524288 out
>          res 40/00:cc:78:06:fe/00:00:00:00:00/40 Emask 0x10 (ATA bus error)
> ata3.00: cmd 61/00:e0:78:9e:fd/04:00:00:00:00/40 tag 28 cdb 0x0 data 
> 524288 out
>          res 40/00:cc:78:06:fe/00:00:00:00:00/40 Emask 0x10 (ATA bus error)
> ata3.00: cmd 61/00:e8:78:a2:fd/04:00:00:00:00/40 tag 29 cdb 0x0 data 
> 524288 out
>          res 40/00:cc:78:06:fe/00:00:00:00:00/40 Emask 0x10 (ATA bus error)
> ata3.00: cmd 61/00:f0:78:a6:fd/04:00:00:00:00/40 tag 30 cdb 0x0 data 
> 524288 out
>          res 40/00:cc:78:06:fe/00:00:00:00:00/40 Emask 0x10 (ATA bus error)
> ata3: waiting for device to spin up (7 secs)
> ata3: soft resetting port
> ata3: SATA link up 3.0 Gbps (SStatus 123 SControl 300)
> ata3.00: configured for UDMA/133
> ata3: EH complete
> SCSI device sdc: 1465149168 512-byte hdwr sectors (750156 MB)
> sdc: Write Protect is off
> sdc: Mode Sense: 00 3a 00 00

These kind of errors are often caused by hardware issues: bad/loose SATA 
cable, insufficient power supply, etc. When the controller reports 
things like PHY ready changes, it's not normally a driver problem.
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