On Tue, 16 Dec 2008, Bruce Allen wrote:

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[632714.975844] ata1.00: status: { DRDY ERR }
[632714.975847] ata1.00: error: { IDNF }

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IDNF - ID not found, usually these days means 'asked for a sector out of
range'

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Justin, was this error provoked for example by you using a 'dd' command to
try and read stuff past the end of the disk?  Because the md device driver
should not try and do something like that.  The md device driver knows how
many LBAs are available on the disk and should never issue a read or write
past the end of the device.

Justin, I have the impression that this IDNF error was NOT due to you 
issuing
dd commands or similar, but was part of 'normal' md operation.

When you say 'the errors occured' do you mean specifically the 'IDNF' errors? 
Those are the onces I am talking about.  I am NOT talking about other types 
of errors like UNC or ABORT.  I am ONLY talking about the IDNF errors.

It is easy to check if the IDNF errors are from the disk firmware or the 
Linux kernel.

The kernel error message for IDNF should report the LBA which provoked that 
IDNF error.  Please compare that with the maximum LBA on the disk, which you 
can get either via hdparm or smartctl -i (divide total capacity in bytes by 
512).

If the LBA reported in the kernel error message is greater than the maximum 
LBA on the disk, then the problem is in the Linux kernel.  If the LBA 
reported by the kernel is less than the maximum LBA on the disk, then the 
problem is the disk firmware (or perhaps the disk has its capacity 'clipped' 
with the 'Host Protected Area' feature set.  But the Linux kernel should know 
about this, so that would be a kernel bug again, not a disk firmware bug).

Going to plug-in one of the disks to a test system, I dare not use them in
a real host anymore.. ok, plugged in:

syslog-Nov 25 02:53:25 p34 kernel: [842756.834250] end_request: I/O error, dev sda, sector 213221352

smartctl -i

# smartctl -i /dev/sdg
smartctl version 5.38 [x86_64-unknown-linux-gnu] Copyright (C) 2002-8 Bruce Allen
Home page is http://smartmontools.sourceforge.net/

=== START OF INFORMATION SECTION ===
Device Model:     WDC WD3000GLFS-01F8U0
Serial Number:    [ .. ]
Firmware Version: 03.03V01
User Capacity:    300,069,052,416 bytes
Device is:        Not in smartctl database [for details use: -P showall]
ATA Version is:   8
ATA Standard is:  Exact ATA specification draft version not indicated
Local Time is:    Tue Dec 16 17:44:53 2008 EST
SMART support is: Available - device has SMART capability.
SMART support is: Enabled

300069052416/512
586072368.000
213221352 <- error on sector (even though WD Diag Tools and smart shows the
disk as completely 100% ok)

hdparm -i

# hdparm -i /dev/sdg

/dev/sdg:

  Model=WDC WD3000GLFS-01F8U0                   , FwRev=03.03V01, SerialNo= [..]
  Config={ HardSect NotMFM HdSw>15uSec SpinMotCtl Fixed DTR>5Mbs FmtGapReq }
  RawCHS=16383/16/63, TrkSize=0, SectSize=0, ECCbytes=52
  BuffType=unknown, BuffSize=16384kB, MaxMultSect=16, MultSect=?16?
  CurCHS=16383/16/63, CurSects=16514064, LBA=yes, LBAsects=586072368
  IORDY=on/off, tPIO={min:120,w/IORDY:120}, tDMA={min:120,rec:120}
  PIO modes:  pio0 pio3 pio4
  DMA modes:  mdma0 mdma1 mdma2
  UDMA modes: udma0 udma1 udma2 udma3 udma4 *udma5 udma6
  AdvancedPM=no WriteCache=enabled
  Drive conforms to: Unspecified:  ATA/ATAPI-1,2,3,4,5,6,7

  * signifies the current active mode

hdparm -I

# hdparm -I /dev/sdg

/dev/sdg:

ATA device, with non-removable media
         Model Number:       WDC WD3000GLFS-01F8U0
         Serial Number:      [ .. ]
         Firmware Revision:  03.03V01
         Transport:          Serial, SATA 1.0a, SATA II Extensions, SATA Rev 2.5
Standards:
         Supported: 8 7 6 5
         Likely used: 8
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:  586072368
         device size with M = 1024*1024:      286168 MBytes
         device size with M = 1000*1000:      300069 MBytes (300 GB)
Capabilities:
         LBA, IORDY(can be disabled)
         Queue depth: 32
         Standby timer values: spec'd by Standard, with device specific minimum
         R/W multiple sector transfer: Max = 16  Current = 16
         Recommended acoustic management value: 128, current value: 254
         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
                 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
                 Power-Up In Standby feature set
            *    SET_FEATURES required to spinup after power up
                 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
            *    WRITE_{DMA|MULTIPLE}_FUA_EXT
            *    64-bit World wide name
            *    WRITE_UNCORRECTABLE_EXT command
            *    {READ,WRITE}_DMA_EXT_GPL commands
            *    Segmented DOWNLOAD_MICROCODE
            *    SATA-I signaling speed (1.5Gb/s)
            *    SATA-II signaling speed (3.0Gb/s)
            *    Native Command Queueing (NCQ)
            *    Phy event counters
                 DMA Setup Auto-Activate optimization
            *    Software settings preservation
            *    SMART Command Transport (SCT) feature set
            *    SCT Long Sector Access (AC1)
            *    SCT LBA Segment Access (AC2)
            *    SCT Error Recovery Control (AC3)
            *    SCT Features Control (AC4)
            *    SCT Data Tables (AC5)
                 unknown 206[12] (vendor specific)
                 unknown 206[13] (vendor specific)
Security:
         Master password revision code = 65534
                 supported
         not     enabled
         not     locked
         not     frozen
         not     expired: security count
         not     supported: enhanced erase
         48min for SECURITY ERASE UNIT. 
Logical Unit WWN Device Identifier: 50014ee0ab4e9a45
         NAA             : 5
         IEEE OUI        : 14ee
         Unique ID       : 0ab4e9a45
Checksum: correct

Here is the information from older INDFs:

syslog-Nov 25 02:53:13 p34 kernel: [842744.785524] ata1: EH complete
syslog-Nov 25 02:53:13 p34 kernel: [842744.794100] sd 0:0:0:0: [sda] 586072368 512-byte hardware sectors (300069 MB)
syslog-Nov 25 02:53:13 p34 kernel: [842744.794573] sd 0:0:0:0: [sda] Write Protect is off
syslog-Nov 25 02:53:13 p34 kernel: [842744.794576] sd 0:0:0:0: [sda] Mode Sense: 00 3a 00 00
syslog-Nov 25 02:53:13 p34 kernel: [842744.795031] sd 0:0:0:0: [sda] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA
syslog-Nov 25 02:53:25 p34 kernel: [842756.811091] ata1.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x0
syslog-Nov 25 02:53:25 p34 kernel: [842756.811097] ata1.00: irq_stat 0x40000001
syslog-Nov 25 02:53:25 p34 kernel: [842756.811104] ata1.00: cmd 35/00:d0:e8:7f:b5/00:03:0c:00:00/e0 tag 0 dma 499712 out
syslog-Nov 25 02:53:25 p34 kernel: [842756.811106]          res 51/10:d0:e8:7f:b5/00:03:0c:00:00/e0 Emask 0x81 (invalid argument)
syslog-Nov 25 02:53:25 p34 kernel: [842756.811110] ata1.00: status: { DRDY ERR }
syslog:Nov 25 02:53:25 p34 kernel: [842756.811113] ata1.00: error: { IDNF }
syslog-Nov 25 02:53:25 p34 kernel: [842756.834198] ata1.00: configured for UDMA/133
syslog-Nov 25 02:53:25 p34 kernel: [842756.834227] sd 0:0:0:0: [sda] Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE,SUGGEST_OK
syslog-Nov 25 02:53:25 p34 kernel: [842756.834231] sd 0:0:0:0: [sda] Sense Key : Aborted Command [current] [descriptor]
syslog-Nov 25 02:53:25 p34 kernel: [842756.834235] Descriptor sense data with sense descriptors (in hex):
syslog-Nov 25 02:53:25 p34 kernel: [842756.834237]         72 0b 14 00 00 00 00 0c 00 0a 80 00 00 00 00 00 
syslog-Nov 25 02:53:25 p34 kernel: [842756.834243]         0c b5 7f e8 
syslog-Nov 25 02:53:25 p34 kernel: [842756.834246] sd 0:0:0:0: [sda] Add. Sense: Recorded entity not found
syslog-Nov 25 02:53:25 p34 kernel: [842756.834250] end_request: I/O error, dev sda, sector 213221352
syslog-Nov 25 02:53:25 p34 kernel: [842756.834263] __ratelimit: 118 callbacks suppressed
syslog-Nov 25 02:53:25 p34 kernel: [842756.834265] Buffer I/O error on device sda, logical block 26652669