HDD for virtual machines

    • OMV 3.x

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    • HDD for virtual machines

      Hi !

      At the moment i have an old 500 GB WD hard drive for my virtual machines in OMV running mailserver and nextcloud server.

      The HDD now has 30000 power on hours and at the moment i get smart errors, but the drive is still working.

      But i think i have to replace it soon.

      I don't need many space, which means that at least 200-250 gb would be enough.

      Would you buy another HDD (which one ?) or would you go to a 250 GB SSD ?

      The server is on 24/7 and the drive is backed up every night.

      Thank you for your replys

      Greets Karl
    • With SSD's , if you go that route, get a name brand. (SanDisk, PNY, Samsung, etc.) The cheap items from China are susceptible to early failure.

      In running a mail server and a Next Cloud server for home or SOHO use, realize that your speed bottle neck will be the network, not drive throughput. IMHO: Just about any hard drive would work for your purposes so if you go with an SSD, I'd lean more toward price, not performance.
      Good backup takes the "drama" out of computing
      OMV 3.0.99 Erasmus
      ThinkServer TS140, 12GB ECC / 32GB USB3.0
      4TB SG+4TB TS ZFS mirror/ 3TB TS

      OMV 3.0.99 Erasmus - Rsync'ed Backup
      R-PI 2 $29 / 16GB SD Card $8 / Real Time Clock $1.86
      4TB WD My Passport $119
    • Karle wrote:

      My system SSD is a very cheap pSandisk ... according smart Information it has now 36000 hours and still 90% of life.
      What model Sandisk SSD do you have?
      Good backup takes the "drama" out of computing
      OMV 3.0.99 Erasmus
      ThinkServer TS140, 12GB ECC / 32GB USB3.0
      4TB SG+4TB TS ZFS mirror/ 3TB TS

      OMV 3.0.99 Erasmus - Rsync'ed Backup
      R-PI 2 $29 / 16GB SD Card $8 / Real Time Clock $1.86
      4TB WD My Passport $119
    • Hi !

      I have the following one as system SSD:

      32GB SanDisk ReadyCache 2.5" SATA 6Gb -> bought in december 2013.

      Here the Smart values:

      Model Family: SanDisk based SSDs
      Device Model: SanDisk SDSSDRC032G
      Serial Number: 134106401464
      LU WWN Device Id: 5 001b44 a44f246b8
      Firmware Version: 3.0.0
      User Capacity: 32,017,047,552 bytes [32.0 GB]
      Sector Size: 512 bytes logical/physical
      Rotation Rate: Solid State Device
      Form Factor: 1.8 inches
      Device is: In smartctl database [for details use: -P show]
      ATA Version is: ACS-2 T13/2015-D revision 3
      SATA Version is: SATA 3.0, 6.0 Gb/s (current: 6.0 Gb/s)
      Local Time is: Fri Mar 9 18:00:17 2018 CET
      SMART support is: Available - device has SMART capability.
      SMART support is: Enabled
      AAM feature is: Unavailable
      APM level is: 254 (maximum performance)
      Rd look-ahead is: Enabled
      Write cache is: Enabled
      ATA Security is: Disabled, frozen [SEC2]
      Wt Cache Reorder: Unavailable

      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: ( 25) The self-test routine was aborted by
      the host.
      Total time to complete Offline
      data collection: ( 120) seconds.
      Offline data collection
      capabilities: (0x51) SMART execute Offline immediate.
      No Auto Offline data collection support.
      Suspend Offline collection upon new
      No Offline surface scan supported.
      Self-test supported.
      No 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: ( 2) minutes.
      Extended self-test routine
      recommended polling time: ( 7) minutes.

      SMART Attributes Data Structure revision number: 1
      Vendor Specific SMART Attributes with Thresholds:
      5 Reallocated_Sector_Ct -O---- 100 100 000 - 0
      9 Power_On_Hours -O---- 100 100 000 - 36633
      12 Power_Cycle_Count -O---- 100 100 000 - 81
      171 Program_Fail_Count -O---- 100 100 000 - 0
      172 Erase_Fail_Count -O---- 100 100 000 - 0
      173 Avg_Write/Erase_Count -O---- 100 100 000 - 219
      174 Unexpect_Power_Loss_Ct -O---- 100 100 000 - 32
      187 Reported_Uncorrect -O---- 100 100 000 - 0
      230 Perc_Write/Erase_Count -O---- 100 100 000 - 730
      232 Perc_Avail_Resrvd_Space PO---- 100 100 005 - 0
      234 Perc_Write/Erase_Ct_BC -O---- 100 100 000 - 364
      241 Total_LBAs_Written -O---- 100 100 000 - 4495811996
      242 Total_LBAs_Read -O---- 100 100 000 - 1548106641
      ||||||_ K auto-keep
      |||||__ C event count
      ||||___ R error rate
      |||____ S speed/performance
      ||_____ O updated online
      |______ P prefailure warning

      General Purpose Log Directory Version 1
      SMART Log Directory Version 1 [multi-sector log support]
      Address Access R/W Size Description
      0x00 GPL,SL R/O 1 Log Directory
      0x01 GPL,SL R/O 1 Summary SMART error log
      0x03 GPL,SL R/O 16 Ext. Comprehensive SMART error log
      0x04 GPL,SL R/O 8 Device Statistics log
      0x06 GPL,SL R/O 1 SMART self-test log
      0x09 GPL,SL R/W 1 Selective self-test log
      0x10 GPL,SL R/O 1 SATA NCQ Queued Error log
      0x11 GPL,SL R/O 1 SATA Phy Event Counters log
      0x30 GPL,SL R/O 9 IDENTIFY DEVICE data log
      0x80-0x9f GPL,SL R/W 16 Host vendor specific log
      0xa1 GPL,SL VS 1 Device vendor specific log
      0xa2 GPL,SL VS 2 Device vendor specific log
      0xa3 GPL,SL VS 1 Device vendor specific log
      0xa6-0xa7 GPL,SL VS 255 Device vendor specific log

      SMART Self-test log structure revision number 1
      Num Test_Description Status Remaining LifeTime(hours) LBA_of_first_error
      # 1 Short offline Aborted by host 90% 36584 -
    • Karle wrote:

      I think this should be the value
      Nope, you're doing a dangerous mistake and try to interpret the occurence of some percentage value displayed somewhere but indicating a problem as something else:

      Source Code

      1. SMART Self-test log structure revision number 1
      2. Num Test_Description Status Remaining LifeTime(hours) LBA_of_first_error
      3. # 1 Short offline Aborted by host 90% 36584 -
      These 90% mean that even a short SMART test is aborted after few seconds (less than 10% percent finished) since 90% of the test remain unfinished. And the 'LifeTime(hours)' value only tell when the SMART test has started, this will always be less than or equal to 'Power_On_Hours' SMART attribute.

      Your SanDisk SSD does not provide any SMART attribute that would provide a 'wear out indicator' which is something that would prevent using this SSD for any important usage (at least for me, we don't use any SSD that is not able to tell about internal wear out via SMART so we can replace it if only 10% remaining life are left). I hope the Kingston you bought does provide such a SMART attribute (don't know, I would never buy any flash memory product from Kingston or those other companies that just rehash things they bought somewhere else)