[Bug 1535038] Re: iso-scan doesn't wait long enough

[Jay Michael]

Bug #158976 reports a similar problem in locating the persistence file.

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https://bugs.launchpad.net/bugs/1535038

Title:
  iso-scan doesn't wait long enough

Status in lupin package in Ubuntu:
  New

Bug description:
       The search for the iso file doesn't wait long enough for the
  device to show up.

       In /scripts/lupin-helpers (by way of /scripts/casper-premount
  /20iso-scan), there is a loop that repeatedly checks a flock of
  devices, trying to find the specified "iso-scan/filename"-specified
  iso-file.  The loop tries 3 times, waiting 3 seconds before the 2nd
  and 3rd tries.  It takes about 10 seconds for my external USB drive to
  show up.

       The kernel boot parameter "rootdelay" doesn't seem to be used in
  a "boot=casper" context.  At any rate, it isn't applied before the
  iso-scan.

       Observed in 14.04.1, and in 15.10.

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