Harry Putnam wrote:
> I´m about to add a brand new disk to my opensol-108 install and
> suddenly realized I did´nt know if I needed to do anything to the disk
> once installed.
> 
> I don´t have anything but experimental deletable stuff setup yet.
> (Aside fromm rpool) but plan to put the new disk and one already
> installed (that doesnt have the OS on it) into a raidz1 configuration
> and start experimenting with that.
> 
> Do I need to do some kind of formatting on a new WD 500 IDE disk?
> 
> Or will I be able to simply put an existing empty disk and the new one
> into raidz1 and zfs will take care of the rest?  I don´t have it
> installed yet but wanted to know from the start what I´d need to do to
> it.
> 
> _______________________________________________
> opensolaris-discuss mailing list
> opensolaris-discuss@opensolaris.org

If you only have two disks for a new ZFS pool, I'd recommend a mirror
setup instead of a RAIDZ1. I'm not even sure if you can setup two disks
as a RAIDZ1... Anyway a regular mirror will be much faster than a RAIDZ1
and you won't lose any space in a two disks scenario.

If this new ZFS pool will only be for data, and you'll never want to put
a bootable Opensolaris on it, you can just a the disks without doing
anything. ZFS will populate the disks with an EFI label in this case.

If you might get into the situation that you want to use this pool for
booting you must not put an EFI label on the disks, but rather an SMI
label. You can do this with fdisk. Just create a partition that spans
the whole disk. After this use format to create a slice spanning the
complete partition, and add that slice to your new pool.

BTW: you can boot from a ZFS pool only in a single disk or mirror setup.
No RAIDZ1 support (yet).

HTH,
Thomas
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