** Description changed:

  Filing a note here in case I forget later.
  
- It looks like GRUB in 14.10 doesn't support XFS's new on-disk metadata
- format that has CRCs.  (rationale:
+ It looks like GRUB (2.02-beta2-15) in 14.10 doesn't support XFS's new
+ on-disk metadata format that has CRCs.  (rationale:
  https://www.kernel.org/doc/Documentation/filesystems/xfs-self-
  describing-metadata.txt)
+ 
+ mkfs.xfs -m crc=1,finobt=1 /dev/sdXY   creates an XFS with the new on-
+ disk format.  This is NOT the default, and probably won't be until
+ kernel support for it has been in distros for a while.
+ 
  
  redhat bug with some patches from Dec 2014:
  https://bugzilla.redhat.com/show_bug.cgi?id=1001279
  
  I haven't yet dug up any changelogs about those patches getting merged
  into GRUB's upstream git repo.
  
  If there's a PPA, or an easy way to build a .deb from git master (or
  some other way I can easily test git master on an Ubuntu system), I'd be
  interested and willing to test this.
+ 
+ 
+ (It's possible I'm mistaken here, and my boot problem was from using 
RAID10,f2, rather than from XFS with crc=1.  testing now.)

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https://bugs.launchpad.net/bugs/1424123

Title:
  Need to update for XFS crc=1 (non-default) on-disk format change

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