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Thread: HDD disappears only when mounted

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  1. #1
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    Jan 2013
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    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?

    hdparm:
    Code:
    user@machine:~$ sudo hdparm -I /dev/sdi
    
    /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
    Standards:
            Used: unknown (minor revision code 0x0029)
            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: 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
    Capabilities:
            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
    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
               *    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)
    Security:
            Master password revision code = 65534
                    supported
            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:~$
    smartctl:
    Code:
    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, http://smartmontools.sourceforge.net
    
    === START OF INFORMATION SECTION ===
    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
    
    user@machine:~$
    Last edited by sszen; January 26th, 2013 at 12:52 AM.

  2. #2
    Join Date
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    Lubuntu 14.04 Trusty Tahr

    Re: HDD disappears only when mounted

    sszen; Hi ! Welcome to the forum.

    Look at the obvious things first.
    1. What is your mount point for the drive?
    2. The file system table: post is the output of terminal command:
    Code:
    cat /etc/fstab
    3. Compare the output of:
    Code:
    mount
    with the drive mounted and not mounted;
    4. Look through the dmesg log /var/log/dmesg with the drive mounted and not mounted, errors ??

    If no fault is found here, then maybe bus contention or irq probs ?
    just the way I look at it

  3. #3
    Join Date
    Jan 2013
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    4

    Re: HDD disappears only when mounted

    Thanks for the welcome and responding to my question.

    The mount point is /media/cv4, and the fstab is as follows. The drive in question is commented out, because the drive disappears soon after getting mounted.

    Code:
    user@machine:~$ cat /etc/fstab
    #       /etc/fstab:     static  file    system  information.
    #
    #       Use     'blkid' to      print   the     universally     unique  identifier      for     a
    #       device; this    may     be      used    with    UUID=   as      a      more     robust  way     to      name    devices
    #       that    works   even    if      disks   are     added   and     removed.See     fstab(5).
    #
    #       <file   system> <mount  point>  <type>  <options>       <dump>  <pass>
    proc    /proc   proc    nodev,noexec,nosuid     0       0
    #       /       was     on      /dev/sda1       during  installation
    UUID=6d9ae10a-51e5-48f4-ad84-eb4b3cc3fdeb       /       ext4    errors=remount-ro,usrquota,grpquota,acl,user_xattr      0       1
    #       swap    was     on      /dev/sda5       during  installation
    UUID=49f61a8d-e073-4670-879d-f2f11598724b       none    swap    sw      0      0
    none    /run/lock       tmpfs   rw,noexec,nosuid,nodev,size=52428800    0      0
    UUID=3184ca13-558c-4962-9667-0022f917e379       /media/p        ext4    defaults0       2
    UUID=6c84e608-ba19-4dd1-ac4e-9c17c9cdb258       /media/q        ext4    defaults0       2
    UUID=74c1040e-09ba-4fc9-8183-a32ef4a888df       /media/1        ext4    defaults0       2
    UUID=9bebd92e-7fab-454d-b632-b0195d690413       /media/3        ext4    defaults0       2
    UUID=2683782c-22c1-4a49-93c5-313748c97412       /media/9        ext4    defaults0       2
    UUID=a9f0fe85-2d4d-4f59-9551-f295831c5865       /media/cv7      ext4    defaults0       2
    UUID=167e63ab-e368-433a-8bbc-3b84e31ce6f3       /media/cv8      ext4    defaults0       2
    UUID=715dd4be-7eea-4d43-9072-a211becefeff       /media/3TB-a    ext4    defaults0       2
    UUID=56b7b4bb-0621-4bb4-b1de-9dfade5a8f0d       /media/c3a      ext4    defaults0       2
    #       UUID=16E0-1237                                  /media/hita-1   vfat   iocharset=utf8   0       0
    UUID=281081021080D868                           /media/hita-b   ntfs-3g defaults0       0
    UUID=418fcfbf-bd22-4dfb-99ea-0ffe13549dff       /media/cof      ext4    defaults0       2
    #       UUID=975033a1-7346-4896-9bda-24f732594a9c       /media/cv4      ext4   defaults 0       2
    UUID=c32fa77e-cb81-465d-8015-456370e8cc0e       /media/cv5      ext4    defaults0       2
    UUID=888b513f-f38f-4be3-b066-d0077571f73a       /media/cv6      ext4    defaults0       2
    
    
    user@machine:~$
    When not mounted:
    Code:
    user@machine:~$ mount
    /dev/sda1 on / type ext4 (rw,errors=remount-ro,usrquota,grpquota,acl,user_xattr)
    proc on /proc type proc (rw,noexec,nosuid,nodev)
    sysfs on /sys type sysfs (rw,noexec,nosuid,nodev)
    none on /sys/fs/fuse/connections type fusectl (rw)
    none on /sys/kernel/debug type debugfs (rw)
    none on /sys/kernel/security type securityfs (rw)
    udev on /dev type devtmpfs (rw,mode=0755)
    devpts on /dev/pts type devpts (rw,noexec,nosuid,gid=5,mode=0620)
    tmpfs on /run type tmpfs (rw,noexec,nosuid,size=10%,mode=0755)
    none on /run/lock type tmpfs (rw,noexec,nosuid,nodev,size=52428800)
    none on /run/shm type tmpfs (rw,nosuid,nodev)
    /dev/sdb1 on /media/p type ext4 (rw)
    /dev/sdc1 on /media/q type ext4 (rw)
    /dev/sdn1 on /media/hita-b type fuseblk (rw,nosuid,nodev,allow_other,blksize=4096)
    /dev/sdd1 on /media/3 type ext4 (rw)
    /dev/sdi1 on /media/3TB-a type ext4 (rw)
    /dev/sdh1 on /media/cv5 type ext4 (rw)
    /dev/sdf1 on /media/cv6 type ext4 (rw)
    /dev/sdo1 on /media/cv8 type ext4 (rw)
    /dev/sdl1 on /media/c3a type ext4 (rw)
    /dev/sdm1 on /media/cof type ext4 (rw)
    /dev/sdk1 on /media/1 type ext4 (rw)
    /dev/sdg1 on /media/9 type ext4 (rw)
    /dev/sde1 on /media/cv7 type ext4 (rw)
    gvfs-fuse-daemon on /home/sokoban/.gvfs type fuse.gvfs-fuse-daemon (rw,nosuid,nodev,user=sokoban)
    user@machine:~$
    When mounted (as you can see, ls results in I/O error):
    Code:
    user@machine:~$ sudo mount -U 975033a1-7346-4896-9bda-24f732594a9c       /media/cv4
    user@machine:~$ mount
    /dev/sda1 on / type ext4 (rw,errors=remount-ro,usrquota,grpquota,acl,user_xattr)
    proc on /proc type proc (rw,noexec,nosuid,nodev)
    sysfs on /sys type sysfs (rw,noexec,nosuid,nodev)
    none on /sys/fs/fuse/connections type fusectl (rw)
    none on /sys/kernel/debug type debugfs (rw)
    none on /sys/kernel/security type securityfs (rw)
    udev on /dev type devtmpfs (rw,mode=0755)
    devpts on /dev/pts type devpts (rw,noexec,nosuid,gid=5,mode=0620)
    tmpfs on /run type tmpfs (rw,noexec,nosuid,size=10%,mode=0755)
    none on /run/lock type tmpfs (rw,noexec,nosuid,nodev,size=52428800)
    none on /run/shm type tmpfs (rw,nosuid,nodev)
    /dev/sdb1 on /media/p type ext4 (rw)
    /dev/sdc1 on /media/q type ext4 (rw)
    /dev/sdn1 on /media/hita-b type fuseblk (rw,nosuid,nodev,allow_other,blksize=4096)
    /dev/sdd1 on /media/3 type ext4 (rw)
    /dev/sdi1 on /media/3TB-a type ext4 (rw)
    /dev/sdh1 on /media/cv5 type ext4 (rw)
    /dev/sdf1 on /media/cv6 type ext4 (rw)
    /dev/sdo1 on /media/cv8 type ext4 (rw)
    /dev/sdl1 on /media/c3a type ext4 (rw)
    /dev/sdm1 on /media/cof type ext4 (rw)
    /dev/sdk1 on /media/1 type ext4 (rw)
    /dev/sdg1 on /media/9 type ext4 (rw)
    /dev/sde1 on /media/cv7 type ext4 (rw)
    gvfs-fuse-daemon on /home/sokoban/.gvfs type fuse.gvfs-fuse-daemon (rw,nosuid,nodev,user=sokoban)
    /dev/sdj1 on /media/cv4 type ext4 (rw)
    user@machine:~$
    user@machine:~$ ls /media/cv4
    ls: reading directory /media/cv4: Input/output error
    user@machine:~$
    I don't see any noteworthy entry in /var/log/dmesg.

    I have recreated partition table (GPT) and deleted/recreated partition, but no improvement.

    What's the difference between a mounted partition and an umounted drive? Although SMART seems ok, the HDD (not just the mount point) drops off the system once mounted - might be some bizarre HDD FW bug/HW failure that "raise shield (or perhaps goes in to sleep mode?)" at the first sign of rw access? I mean, even if there were bad sectors and things and ls gets I/O error, shouldn't palimpsest continue to be able to access the HDD's SMART?

  4. #4
    Join Date
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    Re: HDD disappears only when mounted

    sszen;
    I also do not see anything obvious; but there should be a space between defaults and 0 in most of your lines -> can not see that as relating to the problem at hand. But maybe that causes them not to be mounted correctly.
    http://ubuntuforums.org/showthread.php?t=283131
    https://help.ubuntu.com/community/Fstab

    Is the UUID correct ?
    Code:
    sudo blkid
    In respect to the whole drive dropping out of sight, has the drive ever been in a raid array? Or had a type of "Intel Smart Response Technology" ? Such that metadata may still be embedded on the disk ?

    I would think palimpsest to be able to detect the disk under "most" any circumstance.
    just a thought

  5. #5
    Join Date
    Jan 2013
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    Re: HDD disappears only when mounted

    Regarding fstab, columns are separated by tabs. Using cat command in PuTTY and pasting onto this forum somehow eliminated the ones between default and 0.

    The HDD disappeared after mounting for the previous post, so I had to wait until I can reboot the machine. Here is the result, and the UUID seems to match:
    Code:
    user@machine:~$ sudo blkid
    /dev/sda1: UUID="6d9ae10a-51e5-48f4-ad84-eb4b3cc3fdeb" TYPE="ext4"
    /dev/sda5: UUID="49f61a8d-e073-4670-879d-f2f11598724b" TYPE="swap"
    /dev/sdb1: UUID="3184ca13-558c-4962-9667-0022f917e379" TYPE="ext4"
    /dev/sdc1: UUID="6c84e608-ba19-4dd1-ac4e-9c17c9cdb258" TYPE="ext4"
    /dev/sdg1: UUID="2683782c-22c1-4a49-93c5-313748c97412" TYPE="ext4"
    /dev/sdk1: LABEL="2of7" UUID="74c1040e-09ba-4fc9-8183-a32ef4a888df" TYPE="ext4"
    /dev/sde1: UUID="a9f0fe85-2d4d-4f59-9551-f295831c5865" TYPE="ext4"
    /dev/sdd1: LABEL="CopyOf8" UUID="9bebd92e-7fab-454d-b632-b0195d690413" TYPE="ext4"
    /dev/sdh1: LABEL="5of9" UUID="c32fa77e-cb81-465d-8015-456370e8cc0e" TYPE="ext4"
    /dev/sdo1: UUID="167e63ab-e368-433a-8bbc-3b84e31ce6f3" TYPE="ext4"
    /dev/sdf1: LABEL="6of9" UUID="888b513f-f38f-4be3-b066-d0077571f73a" TYPE="ext4"
    /dev/sdi1: UUID="715dd4be-7eea-4d43-9072-a211becefeff" TYPE="ext4"
    /dev/sdj1: LABEL="4of9" UUID="975033a1-7346-4896-9bda-24f732594a9c" TYPE="ext4"
    /dev/sdl1: UUID="56b7b4bb-0621-4bb4-b1de-9dfade5a8f0d" TYPE="ext4"
    /dev/sdm1: LABEL="Overflow2TB" UUID="418fcfbf-bd22-4dfb-99ea-0ffe13549dff" TYPE="ext4"
    /dev/sdn1: LABEL="EASY DRIVE" UUID="281081021080D868" TYPE="ntfs"
    user@machine:~$
    This drive has not been a part of RAID. I came in a Seagate external drive which I used it for several months, and cracked open the shell last month to make it a part of new file server with Snapraid, just like most of the drives that you see in my fstab.

  6. #6
    Join Date
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    Re: HDD disappears only when mounted

    sszen;

    Everything seems to match, still don't have a clue what is the cause.
    sdj1 = media/cv4 = ***24f732594a9c -> should workie.

    Let's see if we can promote some error codes in the dmesg file.
    Leave the sdj drive commented out in /etc/fstab and try and mount the drive manually, making up a different mount point to mount the drive to the file system.
    Code:
    sudo mkdir /mnt/testing
    sudo mount /dev/sdj1 /mnt/testing
    Insure ownership of <some directory> on the mount:
    Code:
    sudo chown username:username /mnt/testing/<some directory>
    Once mounted look in the tail of dmesg for system complaints.

    There is a cause and ubuntu is great about logging.
    look'n to see what we can find
    Can you access and manipulate files in the chosen directory ?

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