[air ~] diskutil list
#: TYPE NAME SIZE IDENTIFIER
0: GUID_partition_scheme *251.0 GB disk0
1: EFI 209.7 MB disk0s1
2: Apple_HFS SSD 100.0 GB disk0s2
3: Apple_Boot Recovery HD 650.0 MB disk0s3
4: Apple_HFS ZFS Pool 150.0 GB disk0s4
[air ~] sudo zpool create pool /dev/disk0s4
diskutil eraseVolume failed, exit status 1
sudo diskutil eraseVolume "ZFS Pool" ZFS /dev/disk0s4
dbrady wrote:… Since HFS+ has a single global lock for all metadata updates (held across the I/O) it is highly sensitive to disk latencies.
Smolk wrote:… shrink the (MacBook Air) system partition and keep it as-is for boot purposes, and create a separate ZFS partition for user data.
grahamperrin wrote:HFS+ disk latencies and metadata updatesdbrady wrote:… Since HFS+ has a single global lock for all metadata updates (held across the I/O) it is highly sensitive to disk latencies.
That's most interesting. Please, do you have handy a link/reference on that subject? I ran a few searches but found nothing specific to HFS+.
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