what would cause SAS-3 HDD to show 0GB capacity?

Discussion in 'RAID Controllers and Host Bus Adapters' started by BLinux, Jul 27, 2018.

  1. BLinux

    BLinux Well-Known Member

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    I'm helping someone with an issue I've never seen before... the hard drive is a seagate st4000nm0025 connected to a LSI SAS2008 based HBA. The hard drive is seen, but shows as 0GB capacity. When using the same HBA and cable connected to a Toshiba SAS-2 300GB HDD, everything looks normal. But with the Seagate SAS-3 drive, it shows 0GB.

    Any idea why?
     
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  2. i386

    i386 Well-Known Member

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    In my experience drives showed 0gb in two situations:
    - a dead or dying drive
    - corrupt partitions (cuased by tools with wrong "tuning" options or by power/cabling problems)
     
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  3. BLinux

    BLinux Well-Known Member

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    yeah, when the person first described the problem to me, at first i thought the drives weren't spinning up due to power disable feature in SAS-3. however, when he showed me that the HBA can see the hard drive, just at 0GB capacity, that means the hard drive is getting power right? at least the logic board is responding to the HBA.

    the seagate drives are supposedly new, but i didn't acquire or test them directly.

    so, you think most likely cause is dead drive perhaps?
     
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  4. mobilenvidia

    mobilenvidia Moderator

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    Drive looks to be working for it to show, but the SAS2008 might not like the SAS3 drive
    Before writing it off try it in another controller, preferably a SAS3 capable
     
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  5. BLinux

    BLinux Well-Known Member

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    I've been avoiding Seagate for a few years now, so I've never tried a Seagate SAS-3 HDD, but with HGST SAS HDD they just negotiate down to SAS-2. No?
     
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  6. Dawg10

    Dawg10 Member

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    The symptoms you're seeing are exactly the same as I dealt with when trying to install 4x ST4oooNM0014 drives: using a 6Gb/s controller = the drives show as 0 bytes. The fix was to use the proper 12Gb/s HBA; a 3008 based LSI9300.

    It seems that, although the Seagate 12Gb/s drive is capable of 12/6/3 speeds, it must be connected to a controller capable of the same.
     
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  7. BLinux

    BLinux Well-Known Member

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    Lol... Ok, so this is just some Seagate SAS-3 HDD quirk then? It's not capable of 6/3Gbps then if it requires a 12Gbps controller.
     
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  8. Dawg10

    Dawg10 Member

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    Both my -0014 and your -0025 drives are documented as 12/6/3 Gb/s capable. In my case (and likely yours), they require a compatible controller to function at any speed.
     
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  9. BLinux

    BLinux Well-Known Member

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    Ok, but if it requires a 12Gbps controller, then it will never operate at 6Gbps, right? Doesn't that effectively make it 12Gbps only?
     
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  10. Dawg10

    Dawg10 Member

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    The LSI9300 will do 12Gb/s SAS or 6Gb/s SATA.

    SAS 9300-8i Host Bus Adapter

    /e: I misunderstood your comment; still working on the first pot of coffee. You would have to install a 12Gb/s drive along side a 6Gb/s SAS drive with a 3008 based HBA; I suspect it will work at 6Gb/s.
     
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    Last edited: Jul 28, 2018
  11. Terry Kennedy

    Terry Kennedy Well-Known Member

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    1) Non-default sector size (see the "how to reformat to 512" sticky here)
    2) Drive configured to not spin up until commanded by the host
    3) Other unknown OEM firmware issue
    4) Defective drive
     
    #11
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