Hi Dave,
Consider the easiest configuration first and it will probably save
you time and money in the long run, like this:
73g x 73g mirror (one large s0 on each disk) - rpool
73g x 73g mirror (use whole disks) - data pool
Then, get yourself two replacement disks, a good backup strategy,
and we all sleep better.
Convert the complexity of some of the suggestions to time and money
for replacement if something bad happens, and the formula would look
like this:
time to configure x time to replace x replacement disks = $$ >
cost of two replacement for two mirrored pools
A complex configuration of slices and a combination of raidZ and
mirrored pools across the same disks will be difficult to administer,
performance will be unknown, not to mention how much time it might take
to replace a disk.
Use the simplicity of ZFS as it was intended is my advice and you
will save time and money in the long run.
Cindy
On 06/23/11 07:38, Dave U. Random wrote:
Edward Ned Harvey <opensolarisisdeadlongliveopensola...@nedharvey.com>
wrote:
Well ...
Slice all 4 drives into 13G and 60G.
Use a mirror of 13G for the rpool.
Use 4x 60G in some way (raidz, or stripe of mirrors) for tank
Use a mirror of 13G appended to tank
Hi Edward! Thanks for your post. I think I understand what you are saying
but I don't know how to actually do most of that. If I am going to make a
new install of Solaris 10 does it give me the option to slice and dice my
disks and to issue zpool commands? Until now I have only used Solaris on
Intel with boxes and used both complete drives as a mirror.
Can you please tell me what are the steps to do your suggestion?
I imagine I can slice the drives in the installer and then setup a 4 way
root mirror (stupid but as you say not much choice) on the 13G section. Or
maybe one root mirror on two slices and then have 13G aux storage left to
mirror for something like /var/spool? What would you recommend? I didn't
understand what you suggested about appending a 13G mirror to tank. Would
that be something like RAID10 without actually being RAID10 so I could still
boot from it? How would the system use it?
In this setup that will install everything on the root mirror so I will
have to move things around later? Like /var and /usr or whatever I don't
want on the root mirror? And then I just make a RAID10 like Jim was saying
with the other 4x60 slices? How should I move mountpoints that aren't
separate ZFS filesystems?
The only conclusion you can draw from that is: First take it as a given
that you can't boot from a raidz volume. Given, you must have one mirror.
Thanks, I will keep it in mind.
Then you raidz all the remaining space that's capable of being put into a
raidz... And what you have left is a pair of unused space, equal to the
size of your boot volume. You either waste that space, or you mirror it
and put it into your tank.
So RAID10 sounds like the only reasonable choice since there are an even
number of slices, I mean is RAIDZ1 even possible with 4 slices?
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