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Thread: HDD disappears only when mounted

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    Join Date
    Jan 2013

    HDD disappears only when mounted

    I have a problematic Seagate 3TB HDD ST3000DM001-9YN166 in Zentyal-Snapraid setup.

    The drive disappears from the system soon after it is mounted, and when it disappears, even Disk Utility cannot see it. Trying to access it from a terminal (e.g. trying to unmount) returns I/O error.

    However, if the drive is not mounted, the drive does not disappear (checked up to 7 days) and Disk Utility has no problem accessing its SMART data. SMART shows airflow-related warning in the past, but I doubt that's the reason for falling off the system (only when mounted.)

    The HDD is connected to HP SAS Expander which is connected to IBM M1015 (flashed to IT mode.) I have tried connecting it to a different port on the SAS Expander where another Seagate of the same model was working fine. Rebooting the machine bring back the HDD, until you mount it.

    How should I toubleshoot?

    user@machine:~$ sudo hdparm -I /dev/sdi
    ATA device, with non-removable media
            Model Number:       ST3000DM001-9YN166
            Serial Number:      <removed for privacy>
            Firmware Revision:  CC94
            Transport:          Serial, SATA Rev 3.0
            Used: unknown (minor revision code 0x0029)
            Supported: 8 7 6 5
            Likely used: 8
            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: 5860533168
            Logical  Sector size:                   512 bytes
            Physical Sector size:                  4096 bytes
            Logical Sector-0 offset:                  0 bytes
            device size with M = 1024*1024:     2861588 MBytes
            device size with M = 1000*1000:     3000592 MBytes (3000 GB)
            cache/buffer size  = unknown
            Nominal Media Rotation Rate: 7200
            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 = ?
            Advanced power management level: 254
            Recommended acoustic management value: 254, current value: 0
            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
            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
               *    DOWNLOAD_MICROCODE
               *    Advanced Power Management feature set
                    SET_MAX security extension
               *    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-Read-Verify feature set
               *    WRITE_UNCORRECTABLE_EXT command
               *    {READ,WRITE}_DMA_EXT_GPL commands
               *    Segmented DOWNLOAD_MICROCODE
               *    Gen1 signaling speed (1.5Gb/s)
               *    Gen2 signaling speed (3.0Gb/s)
               *    Gen3 signaling speed (6.0Gb/s)
               *    Native Command Queueing (NCQ)
               *    Phy event counters
               *    unknown 76[15]
               *    DMA Setup Auto-Activate optimization
                    Device-initiated interface power management
               *    Software settings preservation
               *    SMART Command Transport (SCT) feature set
               *    SCT Long Sector Access (AC1)
                    unknown 206[7]
                    unknown 206[12] (vendor specific)
            Master password revision code = 65534
            not     enabled
            not     locked
            not     frozen
            not     expired: security count
                    supported: enhanced erase
            332min for SECURITY ERASE UNIT. 332min for ENHANCED SECURITY ERASE UNIT.
    Logical Unit WWN Device Identifier: 5000c5003532da9f
            NAA             : 5
            IEEE OUI        : 000c50
            Unique ID       : 03532da9f
    Checksum: correct
    user@machine:~$ sudo smartctl -i /dev/sdi
    smartctl 5.41 2011-06-09 r3365 [x86_64-linux-3.2.0-36-generic] (local build)
    Copyright (C) 2002-11 by Bruce Allen,
    Device Model:     ST3000DM001-9YN166
    Serial Number:    Z1F022KK
    LU WWN Device Id: 5 000c50 03532da9f
    Firmware Version: CC94
    User Capacity:    3,000,592,982,016 bytes [3.00 TB]
    Sector Sizes:     512 bytes logical, 4096 bytes physical
    Device is:        Not in smartctl database [for details use: -P showall]
    ATA Version is:   8
    ATA Standard is:  ATA-8-ACS revision 4
    Local Time is:    Fri Jan 25 17:48:57 2013 EST
    SMART support is: Available - device has SMART capability.
    SMART support is: Enabled
    Last edited by sszen; January 26th, 2013 at 12:52 AM.


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