Ubuntu - Checking whether a harddrive is unpartitioned, runs an OS, or just a data disk?

I dug up an old harddrive and I want to see what's on it. I don't remember if it was ever partitioned, or if it runs windows, or if it's just a backup disk.

Here is what I've done:

• Plug in disk, Ubuntu does not recognize disk and does not automount.

• Open up gparted. See this error:

  Invalid argument during seek for read on /dev/sdd

  and then shows up as unallocated 2.73 TB on /dev/sdd

• sudo fdisk -l

  Disk /dev/sdd: 3000.6 GB, 3000591900160 bytes
  255 heads, 63 sectors/track, 364801 cylinders, total 5860531055 sectors
  Units = sectors of 1 * 512 = 512 bytes
  Sector size (logical/physical): 512 bytes / 512 bytes
  I/O size (minimum/optimal): 512 bytes / 512 bytes
  Disk identifier: 0x00000000
  
     Device Boot      Start         End      Blocks   Id  System
     /dev/sdd1            1  4294967295  2147483647+  ee  GPT
  
  

• sudo smartctl --all /dev/sdd

  === START OF INFORMATION SECTION ===
  Model Family:     Seagate Barracuda 7200.14 (AF)
  Device Model:     ST3000DM001-1CH166
  Serial Number:    Z1F3ZH6B
  LU WWN Device Id: 5 000c50 0652247c5
  Firmware Version: CC27
  User Capacity:    3,000,591,900,160 bytes [3.00 TB]
  Sector Sizes:     512 bytes logical, 4096 bytes physical
  Rotation Rate:    7200 rpm
  Device is:        In smartctl database [for details use: -P show]
  ATA Version is:   ACS-2, ACS-3 T13/2161-D revision 3b
  SATA Version is:  SATA 3.1, 6.0 Gb/s (current: 1.5 Gb/s)
  Local Time is:    Sat May 21 18:05:13 2016 EDT
  
  ==> WARNING: A firmware update for this drive may be available,
  see the following Seagate web pages:
  http://knowledge.seagate.com/articles/en_US/FAQ/207931en
  http://knowledge.seagate.com/articles/en_US/FAQ/223651en
  
  SMART support is: Available - device has SMART capability.
  SMART support is: Enabled
  
  === START OF READ SMART DATA SECTION ===
  SMART overall-health self-assessment test result: PASSED
  
  General SMART Values:
  Offline data collection status:  (0x00) Offline data collection activity
                      was never started.
                      Auto Offline Data Collection: Disabled.
  Self-test execution status:      (   0) The previous self-test routine completed
                      without error or no self-test has ever 
                      been run.
  Total time to complete Offline 
  data collection:        (  584) seconds.
  Offline data collection
  capabilities:            (0x73) SMART execute Offline immediate.
                      Auto Offline data collection on/off support.
                      Suspend Offline collection upon new
                      command.
                      No Offline surface scan supported.
                      Self-test supported.
                      Conveyance Self-test supported.
                      Selective Self-test supported.
  SMART capabilities:            (0x0003) Saves SMART data before entering
                      power-saving mode.
                      Supports SMART auto save timer.
  Error logging capability:        (0x01) Error logging supported.
                      General Purpose Logging supported.
  Short self-test routine 
  recommended polling time:    (   1) minutes.
  Extended self-test routine
  recommended polling time:    ( 321) minutes.
  Conveyance self-test routine
  recommended polling time:    (   2) minutes.
  SCT capabilities:          (0x3085) SCT Status supported.
  
  SMART Attributes Data Structure revision number: 10
  Vendor Specific SMART Attributes with Thresholds:
  ID# ATTRIBUTE_NAME          FLAG     VALUE WORST THRESH TYPE      UPDATED  WHEN_FAILED RAW_VALUE
    1 Raw_Read_Error_Rate     0x000f   100   100   006    Pre-fail  Always       -       1452432
    3 Spin_Up_Time            0x0003   099   099   000    Pre-fail  Always       -       0
    4 Start_Stop_Count        0x0032   100   100   020    Old_age   Always       -       2
    5 Reallocated_Sector_Ct   0x0033   100   100   010    Pre-fail  Always       -       0
    7 Seek_Error_Rate         0x000f   100   253   030    Pre-fail  Always       -       146028888090
    9 Power_On_Hours          0x0032   100   100   000    Old_age   Always       -       5
   10 Spin_Retry_Count        0x0013   100   100   097    Pre-fail  Always       -       0
   12 Power_Cycle_Count       0x0032   100   100   020    Old_age   Always       -       20
  183 Runtime_Bad_Block       0x0032   100   100   000    Old_age   Always       -       0
  184 End-to-End_Error        0x0032   100   100   099    Old_age   Always       -       0
  187 Reported_Uncorrect      0x0032   100   100   000    Old_age   Always       -       0
  188 Command_Timeout         0x0032   100   100   000    Old_age   Always       -       0 0 0
  189 High_Fly_Writes         0x003a   100   100   000    Old_age   Always       -       0
  190 Airflow_Temperature_Cel 0x0022   069   065   045    Old_age   Always       -       31 (Min/Max 29/31)
  191 G-Sense_Error_Rate      0x0032   100   100   000    Old_age   Always       -       0
  192 Power-Off_Retract_Count 0x0032   100   100   000    Old_age   Always       -       10
  193 Load_Cycle_Count        0x0032   100   100   000    Old_age   Always       -       38
  194 Temperature_Celsius     0x0022   031   040   000    Old_age   Always       -       31 (0 27 0 0 0)
  197 Current_Pending_Sector  0x0012   100   100   000    Old_age   Always       -       0
  198 Offline_Uncorrectable   0x0010   100   100   000    Old_age   Offline      -       0
  199 UDMA_CRC_Error_Count    0x003e   200   200   000    Old_age   Always       -       0
  240 Head_Flying_Hours       0x0000   100   253   000    Old_age   Offline      -       6h+00m+31.860s
  241 Total_LBAs_Written      0x0000   100   253   000    Old_age   Offline      -       89828161
  242 Total_LBAs_Read         0x0000   100   253   000    Old_age   Offline      -       234961
  
  SMART Error Log Version: 1
  No Errors Logged
  
  SMART Self-test log structure revision number 1
  No self-tests have been logged.  [To run self-tests, use: smartctl -t]
  
  
  SMART Selective self-test log data structure revision number 1
   SPAN  MIN_LBA  MAX_LBA  CURRENT_TEST_STATUS
      1        0        0  Not_testing
      2        0        0  Not_testing
      3        0        0  Not_testing
      4        0        0  Not_testing
      5        0        0  Not_testing
  Selective self-test flags (0x0):
    After scanning selected spans, do NOT read-scan remainder of disk.
  If Selective self-test is pending on power-up, resume after 0 minute delay.
  
  

  `

This is one of those crappy Seagate 3TB drives with high failure rates (and a class-action lawsuit to follow). Is this drive just an unpartitioned empty hdd? Is it still in good working condition?

I'm about to reformat this disk, but I want to make sure I'm not overwriting anything. Am I safe?

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