[Bug 245430] ZFS boot failure following memory exhaustion
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Date: Fri, 02 Jun 2023 12:56:29 UTC
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=245430
Jason W. Bacon <jwb@freebsd.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|Open |Closed
Resolution|--- |FIXED
--- Comment #7 from Jason W. Bacon <jwb@freebsd.org> ---
Note to posterity:
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=199804 describes a fix that
was applied, and also a potential problem with disks too large for the BIOS,
which the fix cannot address. While using GPT will allow one to boot from
disks larger than 2 TB, there could be problems when files in /boot are updated
and the only space available for the new files is beyond the 2 TB boundary.
This is why recreating /boot *sometimes* works. It may or may not bring the
necessary files within the BIOS limit.
Having /boot on a smaller partition solves the problem permanently. I've
installed some systems on a ~250 GB UFS partition and then created a zpool on
the remaining space afterward. This configuration has worked flawlessly for
many years.
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