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[Bug 1340448] [NEW] 5% reservation for root is inappropriate for large disks/arrays

 

Public bug reported:

mke2fs (and it's ext3 and ext4 analogs) still default to reserving 5%
of the filesystem for root.  With the size of modern disks and arrays
this isn't a terribly sensible default, e.g. if I have a 10Tb array,
mke2fs will reserve 500Gb for root.

Obviously this is both tunable at FS creation time and fixable after
the fact but I still think we should try and improve the defaults.

Given the size of modern disks, I think it'd make sense to either a)
only reserve a smaller amount (e.g. 1%) or b) reserve n% if the
filesystem is << NNN GB and otherwise reserve NN GB.

** Affects: e2fsprogs (Ubuntu)
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/1340448

Title:
  5% reservation for root is inappropriate for large disks/arrays

Status in “e2fsprogs” package in Ubuntu:
  New

Bug description:
  mke2fs (and it's ext3 and ext4 analogs) still default to reserving 5%
  of the filesystem for root.  With the size of modern disks and arrays
  this isn't a terribly sensible default, e.g. if I have a 10Tb array,
  mke2fs will reserve 500Gb for root.

  Obviously this is both tunable at FS creation time and fixable after
  the fact but I still think we should try and improve the defaults.

  Given the size of modern disks, I think it'd make sense to either a)
  only reserve a smaller amount (e.g. 1%) or b) reserve n% if the
  filesystem is << NNN GB and otherwise reserve NN GB.

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