Hi All,

I have a laptop with twin 500 GB hard disks and I'm looking how best to protect 
my data.  I would run Open Solaris as my primary system however I have specific 
hardware requirements which means I am forced to use Windows 7 as my primary 
o/s.  However I would like to utilise the power of ZFS manage my data needs.  

Currently I am experimenting with the following set-up:

1) Create 2 RAW partitions in Windows 7 on each physical disk of 350 GB, 
remember 1 disk will have Windows 7 NTFS partitions, and I might install a 
Linux host on the other disk meaning a few EXT4 partitions
2) Create VirtualBox Open Solaris guest on a 10 GB vdi disk
3) Give the guest VM raw disk access to the 2 partitions created in step 1 and 
attach using VirtualBox SATA controller, a VMDK container file is created to 
represent each partition
4) Make VirtualBox honour flushing by issuing the following command for the two 
partitions:

VBoxManage setextradata "VM name" 
"VBoxInternal/Devices/ahci/0/LUN#[x]/Config/IgnoreFlush" 0

5) In Open Solaris create a mirrored pool using the two partitions and make it 
a SMB share
6) Mount share in Windows 7 host

Now the above has worked a treat so far, but I am yet to test by pulling the 
plug on the VM during read and write operations etc, but the reason for posting 
is that the official documentation recommends NOT using partitions on disks and 
using whole physical disks is encouraged.

What I would like to know is what risks do I carry by using partitions, I 
attempted to search for the rationale behind this advice but I can't seem to 
find it...

If the implications are serious and the likelihood of them occurring then I 
have thought of using one the internal physical 500 GB disks coupled with an 
external USB 500 GB disk that I have, in which case at times the pool would 
operate in a degraded state as the USB drive will not always be connected, in 
which case re-silvering would take place to sync the mirror, again any serious 
implications of doing this??

Many Thanks,

Jana
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