[Bug 265714] igc(4) drops link under high traffic

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=265714

Sean Farley <[email protected]> changed:

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--- Comment #48 from Sean Farley <[email protected]> ---
(In reply to Tomasz "CeDeROM" CEDRO from comment #46)

From something I read, the 2MB file can either mean the backup firmware is
actually 2MB or it is 1MB but padded with zeroes because the tool is written to
handle 2MB regardless of the source.  In my case, I ran `split -b 1M` on the
firmware and found that xaa and xab are exactly the same.  While I did not try
it, my system would need only the first half of the backup file to actually be
able to restore the backup.

BTW, if anyone runs into a corrupted state, there is a better, yet harder to
find, tool called eeupdate64e (EFI, Windows and Linux versions).  Here is its
help someone posted: 
https://ohlia.github.io/Wiki-site/wiki/Network/Intel-Ethernet-Network-Adapter-Flash-Tool-eeupdate/

Also, sometimes, powering the system off, turning off the PSU and waiting
several minutes (to make certain) can cause things to recover from things like
a tool complaining about the shadow RAM being corrupt/invalid.  Hopefully, no
one needs to go through this.

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