back to article Seagate HAMRs out a roadmap for future hard drive recording tech

Seagate has set a course to deliver a 48TB disk drive in 2023 using its HAMR (heat-assisted magnetic recording) technology, doubling areal density every 30 months, meaning 100TB could be possible by 2025/26. HAMR overcomes the tendency of smaller magnetised areas in current PMR (perpendicular magnetic recording) technology to …

  1. Aladdin Sane Silver badge

    100TB

    That's a lot of smut.

    1. DropBear Silver badge

      Re: 100TB

      I'm looking right now to upgrade my current 1TB disk, which suddenly has panic attacks of crushing inadequacy after it saw this article. The reason is, of course, in no way shape or form related the above-mentioned materials. Nu-uh. No Sir. No way, no how. Nope. Nothing to see here, move along...

    2. Anonymous Coward
      Anonymous Coward

      Re: 100TB

      Yea, that's two Benders of porn! (possible official El-Reg unit of storage?)

    3. Alan Brown Silver badge

      Re: 100TB

      "That's a lot of smut."

      Or a reasonable amount of 8k smut.

  2. anthonyhegedus Silver badge

    Should be large enough to hold drivers for more than one Hewlett-Packard printer then!

  3. WireBug
    Devil

    Awesome!

    This is fantastic! Now I can loose even larger amounts of data when it fails... thanks Seagate!!!

    1. Herring` Silver badge

      Re: Awesome!

      Well be responsible and set up 3 of them in RAID 5 ;-)

      1. Anonymous Coward
        Anonymous Coward

        Re: Awesome!

        How long would the re-build time be? Even a 10 TB drive is days to rebuild. Well have to come up with raidz9 to store one disks' worth of data just to give you a fighting chance of rebuilding it, before the redundant hard disks wear out.

        1. DougS Silver badge

          Re: Awesome!

          Was waiting for some joker to complain about rebuild time, which is inevitable in every article about "bigger hard drives coming". If you aren't already using forms of RAID that distribute parity instead of putting it on a single drive, and support the failure of more than one drive in a group, then you deserve a week long rebuild.

          No one will force you to buy 100TB drives, you can keep using 500GB drives and get great rebuild times if sticking with antiquated RAID5 is that important to you.

          1. dgeb

            Re: Awesome!

            Well - for a start - RAID5 *does* distribute parity across drives, but the main benefit to doing so is random write (and a lesser extent read); rebuilds require reading the whole rest of the stripe anyway, so only gain from the improvements to concurrent access.

            Multiple parity (substantially) improves your odds of a successful rebuild - but it certainly doesn't make it faster - it can only be slower than an equivalent single-parity configuration as there is more computational overhead.

            Ultimately, any RAID rebuild requires reading data equivalent to the capacity of the entire (sub)unit being rebuilt, and writing out the entire rebuilt drive - possibly whilst also satisfying routine IOs.

        2. HobartTas

          Re: Awesome!

          Depends on how they increase the storage size whether by increasing the track density or the DPI and if say you assume the drive will be 4 times bigger by doubling both then it will still only take twice as long to access all of it as you will get double the data in each rotation of the platter so ZFS Raid-Z3 will probably suffice and it doesn't even matter if they are shingled because even Solaris introduced sequential re-silver I think in version 11.2 in 2014. If you don't use the raid array whilst its re-silvering you're hardly working the actuator heads as they will be gently clicking over from one track to the next and the fluid bearings won't wear out and also being enterprise drives they will be adequately cooled so no problems there either. I've sequentially re-silvered an idle ten drive Raid-Z2 array of 3TB Toshiba DT01ACA300's in 7 hours with an I7-4820K CPU processing 1 GB's and my other array in another PC with an E5-2670 v1 CPU does 1.3 GB's and in enterprise systems with more grunt they should go even faster, so yes it could take days but so what? with ZFS the procedure should eventually complete successfully no matter how long it actually takes.

    2. Aladdin Sane Silver badge
      Headmaster

      Re: Awesome!

      You loose data on a drive, only to lose it later.

    3. emv

      Re: Awesome!

      No worries about losing a 100TB drive. you can back it up over your 10Mbps in no time at all.

  4. LordHighFixer

    Should be interesting

    I predict a number of fascinating failure types when the heating part of the rw head fails. oops, RO drive.

    1. Craig 2

      Re: Should be interesting

      If the worst kind of failure simply turned it into a read-only drive I would be happy with that!

      1. DougS Silver badge

        Re: Should be interesting

        A failure of the heating element would make it read only so long as it noticed that and didn't try to write anyway - otherwise the attempted write might change some of the data but not all and corrupt what you have.

        1. Spazturtle Silver badge

          Re: Should be interesting

          I believe the idea is that the write head isn't powerfully enough to actually write on it own. The big issue has been making the write head smaller, but HAMR bypasses that. The laser is smaller then the write heads writing area, but as the write head can't write without the laser it can only write to the area that the laser has heated.

  5. Craig 2

    I can't read stories on hard drive density without immediately worrying about my stored data and it's seemingly precarious existence...

  6. GrapeBunch Silver badge

    What do TLA's use to store what they slurp? It must be better than consumer kit....

  7. Alan Brown Silver badge

    So....

    Can Seagrate manage to increase the size of their drives faster than SSDs reduce their pricing?

    Will they match the warranties?

    Will the power consumption come down?

    Enquiring gnomes wish to mine.

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