Today we go to heroic lengths to workaround bugs in the JDK or around
issues like BSD jails to get information about the underlying file
store. For example, we went to lengths to work around a JDK bug where
the file store returned would incorrectly report whether or not a path
is writable in certain situations in Windows operating
systems. Another bug prevented getting file store information on
Windows on a virtual drive on Windows. We no longer need to work
around these bugs, we could simply try to write to disk and let an I/O
exception arise if we could not write to the disk or take advantage of
the fact that these bugs are fixed in recent releases of the JDK
(e.g., the file store bug is fixed since 8u72). Additionally, we
collected information about all file stores on the system which meant
that if the user had a stale NFS mount, Elasticsearch could hang and
fail on startup if that mount point was not available. Finally, we
collected information through Lucene about whether or not a disk was a
spinning disk versus an SSD, information that we do not need since we
assume SSDs by default. This commit takes into consideration that we
simply do not need this heroic effort, we do not need information
about all file stores, and we do not need information about whether or
not a disk spins to greatly simplfy file store handling.
Relates #24402
de65f51d34