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From: Hugo Mills <>
Subject: Spurious completions during NCQ
Date: Fri, 15 Feb 2008 13:46:58 +0000	[thread overview]
Message-ID: <> (raw)

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   I'm getting these on my Dell Latitude D830:

Feb 15 13:06:00 willow kernel: ata1.00: exception Emask 0x2 SAct 0x4 SErr 0x0 action 0x2 frozen
Feb 15 13:06:00 willow kernel: ata1.00: spurious completions during NCQ issue=0x0 SAct=0x4 FIS=004040a1:00000002
Feb 15 13:06:00 willow kernel: ata1.00: cmd 61/10:10:26:fb:c4/00:00:02:00:00/40 tag 2 cdb 0x0 data 8192 out
Feb 15 13:06:00 willow kernel:          res 40/00:10:26:fb:c4/00:00:02:00:00/40 Emask 0x2 (HSM violation)
Feb 15 13:06:00 willow kernel: ata1: soft resetting port
Feb 15 13:06:00 willow kernel: ata1: SATA link up 3.0 Gbps (SStatus 123 SControl 300)
Feb 15 13:06:00 willow kernel: ata1.00: configured for UDMA/133
Feb 15 13:06:00 willow kernel: ata1: EH complete
Feb 15 13:06:00 willow kernel: sd 0:0:0:0: [sda] 312581808 512-byte hardware sectors (160042 MB)
Feb 15 13:06:00 willow kernel: sd 0:0:0:0: [sda] Write Protect is off
Feb 15 13:06:00 willow kernel: sd 0:0:0:0: [sda] Mode Sense: 00 3a 00 00
Feb 15 13:06:00 willow kernel: sd 0:0:0:0: [sda] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA

   In some cases, there are several cmd/res lines listed. It's
happening about once an hour or so (not correlated with any other
event that I can see). It doesn't seem to be affecting operation of
the machine, but it's making me nervous.

   Can anyone set my mind at rest? (Or suggest a fix?)

uname -a reports:
Linux willow #1 SMP Sun Nov 4 14:51:20 GMT 2007 x86_64 GNU/Linux

   It's a kernel with the patch for tickless operation on

hdparm -i reports:


 Model=ST9160823AS                             , FwRev=3.ADC   , SerialNo=            5NK0C448
 Config={ HardSect NotMFM HdSw>15uSec Fixed DTR>10Mbs RotSpdTol>.5% }
 RawCHS=16383/16/63, TrkSize=0, SectSize=0, ECCbytes=4
 BuffType=unknown, BuffSize=8192kB, MaxMultSect=16, MultSect=?8?
 CurCHS=16383/16/63, CurSects=16514064, LBA=yes, LBAsects=268435455
 IORDY=on/off, tPIO={min:120,w/IORDY:120}, tDMA={min:120,rec:120}
 PIO modes:  pio0 pio1 pio2 pio3 pio4 
 DMA modes:  mdma0 mdma1 mdma2 
 UDMA modes: udma0 udma1 udma2 udma3 udma4 udma5 
 AdvancedPM=yes: unknown setting WriteCache=enabled
 Drive conforms to: Unspecified:  ATA/ATAPI-1,2,3,4,5,6,7

 * signifies the current active mode


=== Hugo Mills: hugo@... | | ===
  PGP key: 515C238D from or
              --- w.w.w.  : England's batting scorecard ---              

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             reply	other threads:[~2008-02-15 14:29 UTC|newest]

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2008-02-15 13:46 Hugo Mills [this message]
2008-02-15 15:00 ` Calvin Walton
2008-02-15 15:04   ` Hugo Mills
2008-02-15 15:37     ` Michael Tokarev
2008-02-16 14:08 ` Mark Lord
2008-03-06  5:56   ` Tejun Heo
2008-03-06  6:05     ` Tejun Heo
  -- strict thread matches above, loose matches on Subject: below --
2007-10-13 13:12 Marco Lamberto
2007-09-07 17:57 Sumanth J.V

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