[Bug 1776626] Re: [18.10 FEAT] Support 4k sectors for fast clear key dm-crypt - crypttab part

[Dimitri John Ledkov]

It should be possible to specify sector-size option in crypttab now, in
ubuntu. And it should be supported by both initramfs-tools and systemd,
depending on which one does the mount. Please test this, and let me know
if everything is alright. It did work for me... but I used non-4k
hardware.

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Title:
  [18.10 FEAT] Support 4k sectors for fast clear key dm-crypt - crypttab
  part

Status in Ubuntu on IBM z Systems:
  Fix Committed
Status in cryptsetup package in Ubuntu:
  Fix Released
Status in systemd package in Ubuntu:
  Fix Released

Bug description:
  Support fast clear key dm-crypt with 4k support

  Extend /etc/crypttab  to enable 4k sector support in plain mode

  The proposed enhancements are posted on github, see 
       https://github.com/systemd/systemd/issues/8881

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