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the harddisk reliability toplist:

while this toplist says nothing about how reliable the harddisk can store and return exact copy of data written (!!!).

this has to be tested in additionally (long term stress test).

Backblaze regularly publishes statistics on their harddisk failure rates for different models.

also yearly data is published: (thanks! it is really really helpful 🙂

  • 231 drives not included in the list above were either used for testing or did not have at least 60 drives of the same model
  • drives which have less than 250,000 drive days, any conclusions about drive failure rates are not justified. There is not enough data over the year-long period to reach any conclusions. We present the models with less than 250,000 drive days for completeness only
  • SEAGATE 6TB drive (model: ST6000DX000) leads the way with a 0.23% annualized failure rate (AFR).
    • This model was also the oldest, in average age, of all the drives listed.
    • followed closely by the perennial contenders from HGST:
  • HGST 4TB drive (model: HMS5C4040ALE640) at 0.27%
  • HGST 4TB drive (model: HMS5C4040BLE640), at 0.27%
  • HGST 8TB drive (model: HUH728080ALE600) at 0.29%
  • HGST 12TB drive (model: HUH721212ALE600) at 0.31%.

just imagine this worst case scenario:

  • backup1 is done on external harddisk, daily
  • every week backup1 is changed for backup2 (to keep one backup disconnected completely from ransomeware)
  • in order to keep the database clean a restore of the database will have to be performed first
  • now imagine, that because of a faulty external harddisk (a harddisk that does not return the same data that is written to it) faulty data will be restored from that harddisk… effectively corrupting the database
  • if the error goes undetected, the database is corrupted over time up to the point of complete malfunction or breakdown
  • now: how to find out when the corruption started? (to restore a sane copy) hard & massive amount of dataloss
  • all because of a low in quality external harddisk
  • so high quality backup is an absolute MUST (and if a high quality NAS with high quality harddisks costs extra, pay extra, but also: test, test, test…
  • do not rely on brand x being reliable in the past
    • consider using at least two external backup systems, if one turns out to be faulty

story goes like this:

  • currently using 2x intenso 4TB with metall casing (work perfectly since ~3 years)
  • the question was: can those be replaced with the 8tb intenso version?

short answer: no

just hope that this piece of mistake can at least be properly recycled.

it is time to write Seagate and Intenso angry mails and never buy from them again

this external harddisk (the USB-SATA-Adapter AND the harddisk itself) of the intenso 8tb are of catastrophic quality.

here are the reasons:

  1. completely useless as external backup harddisk: highly unreliable (just quits during longer write sessions) (this was tested on Windows Server 2012 R2 with Acronis)
  2. the USB-SATA Adapter is said to messes with the filesystem, so when the hdd is taken out of it’s case and directly SATA connected, can not be read
  3. if the Seagate itself was “okayish” and only the USB-SATA Connector was a catastrophe (so it could be at least opened and salvaged) but unfortunately both are crap? “great”
    • according to many many amazon reviews, this harddisk is “no good” (can not store write and read data reliably… (BTRFS detects those errors, NTFS might not = corrupting the data) so the harddisk itself is utter “cheap” (170€ are not cheap!) crap)
    • MTBF: 1Million hours, for comparison: the HUS726040AL has only 4TB but MTBF of 2Million hours
    • so this is a “as catastrophic as it get’s” cooperation between intenso and Seagate, or maybe has the material to store data in those magnetic harddisk hit “a limit”? (or just has the cost-saving by using cheap parts “hit a limit” and produced massive amounts of useless waste (hope it can be recycled properly at least)
    • is it shingled? (so no good for raid)
      • yes it is
  4. “The data density of HDDs has quadrupled since 1990” (src)
    • “Now, researchers say that graphene, which is a single layer of atoms arranged in a two-dimensional honeycomb lattice, lets them increase the density.” (src)
    • “The Cambridge scientists transferred graphene onto hard disks made of iron-platinum as the magnetic recording layer and tested Heat-Assisted Magnetic Recording (HAMR).”

    • “This new technology enables an increase in storage density by heating the recording layer to high temperatures.”

      “Current COCs don’t perform at these high temperatures, but graphene does.”

    • “Graphene, combined with HAMR, can outperform current HDDs, providing an unprecedented data density higher than 10 terabytes per square inch, the researchers say.

    • more storage scifi: “all of youtube in the fridge”
      • “DNA storage technology”

      • “already exists, but it never has been transformed into a valuable product for consumers.”

      • “That could change thanks to researchers at Los Alamos National Laboratory, who recently developed software, the Adaptive DNA Storage Codex (ADS Codex), which translates data files from the binary language of zeroes and ones that computers understand into the code biology understands.”

        “DNA storage could disrupt the way we think about archival storage because the data retention is so long and the data density so high,”  Bradley Settlemyer, a researcher at Los Alamos, said in a news release. “You could store all of YouTube in your refrigerator instead of in acres and acres of data centers.”

general info about the crap adapter and disk:

lsusb
Bus 003 Device 006: ID 152d:578e JMicron Technology Corp. / JMicron USA Technology Corp.

lsusb -vvv -s 006

Bus 003 Device 006: ID 152d:578e JMicron Technology Corp. / JMicron USA Technology Corp. 
Device Descriptor:
  bLength                18
  bDescriptorType         1
  bcdUSB               3.00
  bDeviceClass            0 
  bDeviceSubClass         0 
  bDeviceProtocol         0 
  bMaxPacketSize0         9
  idVendor           0x152d JMicron Technology Corp. / JMicron USA Technology Corp.
  idProduct          0x578e 
  bcdDevice           20.07
  iManufacturer           1 Intenso
  iProduct                2 External USB 3.0
  iSerial                 3 2021042440543
  bNumConfigurations      1
  Configuration Descriptor:
    bLength                 9
    bDescriptorType         2
    wTotalLength       0x002c
    bNumInterfaces          1
    bConfigurationValue     1
    iConfiguration          0 
    bmAttributes         0xc0
      Self Powered
    MaxPower                8mA
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        0
      bAlternateSetting       0
      bNumEndpoints           2
      bInterfaceClass         8 Mass Storage
      bInterfaceSubClass      6 SCSI
      bInterfaceProtocol     80 Bulk-Only
      iInterface              0 
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x81  EP 1 IN
        bmAttributes            2
          Transfer Type            Bulk
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0400  1x 1024 bytes
        bInterval               0
        bMaxBurst              15
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x02  EP 2 OUT
        bmAttributes            2
          Transfer Type            Bulk
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0400  1x 1024 bytes
        bInterval               0
        bMaxBurst              15
Binary Object Store Descriptor:
  bLength                 5
  bDescriptorType        15
  wTotalLength       0x002a
  bNumDeviceCaps          3
  USB 2.0 Extension Device Capability:
    bLength                 7
    bDescriptorType        16
    bDevCapabilityType      2
    bmAttributes   0x00000002
      HIRD Link Power Management (LPM) Supported
  SuperSpeed USB Device Capability:
    bLength                10
    bDescriptorType        16
    bDevCapabilityType      3
    bmAttributes         0x00
    wSpeedsSupported   0x000e
      Device can operate at Full Speed (12Mbps)
      Device can operate at High Speed (480Mbps)
      Device can operate at SuperSpeed (5Gbps)
    bFunctionalitySupport   1
      Lowest fully-functional device speed is Full Speed (12Mbps)
    bU1DevExitLat          10 micro seconds
    bU2DevExitLat        2047 micro seconds
  Container ID Device Capability:
    bLength                20
    bDescriptorType        16
    bDevCapabilityType      4
    bReserved               0
    ContainerID             {d62a2515-01a8-f94c-9dd3-623391bc654c}
can't get debug descriptor: Resource temporarily unavailable
Device Status:     0x000d
  Self Powered
  U1 Enabled
  U2 Enabled


# what is inside (the USB-SATA Adapter can tell this)
hdparm -I /dev/sdc

/dev/sdc:

ATA device, with non-removable media
	Model Number:       ST8000DM004-2CX188                      
	Serial Number:      XXXXX
	Firmware Revision:  0001    
	Transport:          Serial, ATA8-AST, SATA 1.0a, SATA II Extensions, SATA Rev 2.5, SATA Rev 2.6, SATA Rev 3.0
Standards:
	Used: unknown (minor revision code 0x006d) 
	Supported: 10 9 8 7 6 5 
	Likely used: 10
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: 15628053168
	Logical  Sector size:                   512 bytes
	Physical Sector size:                  4096 bytes
	Logical Sector-0 offset:                  0 bytes
	device size with M = 1024*1024:     7630885 MBytes
	device size with M = 1000*1000:     8001563 MBytes (8001 GB)
	cache/buffer size  = unknown
	Form Factor: 3.5 inch
	Nominal Media Rotation Rate: 5425

# what the USB-SATA adapter does not support: access to the disk's SMART-health data
smartctl -H /dev/sdc

smartctl 6.6 2017-11-05 r4594 [x86_64-linux-4.19.0-18-amd64] (local build)
Copyright (C) 2002-17, Bruce Allen, Christian Franke, www.smartmontools.org

/dev/sdc: Unknown USB bridge [0x152d:0x578e (0x2007)]

Please specify device type with the -d option.

# is it shingled?
if smartctl -l scterc,70,70 /dev/sdc > /dev/null ; then echo " is good"; else echo "no good sue vendor"; fi;
no good sue vendor

# yes it is! (no good for raid)

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