ZFS, GPTIDs, and using the whole disk
Daniel O'Callaghan
danny at clari.net.au
Tue Mar 4 00:58:22 UTC 2014
On 4/03/2014 10:47 AM, Chris Stankevitz wrote:
> Please identify any false statements:
> 1. ZFS prefers to use the entire disk.
Garrett Wollman(I think...) says this is false. FreeBSD's disk
subsystem does not change the way it behaves wrt to disks versus
partitions. Solaris and OpenIndiana only guarantee barrier-writes while
still using write-cache if using the whole disk.
This is also mentioned in https://wiki.freebsd.org/ZFSTuningGuide
"The caveat about only giving ZFS full devices is a solarism that
doesn't apply to FreeBSD. On Solaris write caches are disabled on
drives if partitions are handed to ZFS. On FreeBSD this isn't the case."
With this in mind, my personal preference is to use GPT partitions.
Cheers,
Danny
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