On 6/1/2010 8:36 PM, zfsnoob4 wrote:
Hello,
I currently have a raid1 array setup on Windows 7 with a pair of 1.5TB drives.
I don't have enough space in any other drives to make a backup of all this data
and I really don't want to copy my ~1.1 TB of files over the network anyways.
What I want to do it get a third 1.5 TB drive and make a ZFS RaidZ array (from
what I understand it will have two drives for data and one drive for parity,
total capacity 1.36 * 2 TB).
I think what I need to do is get opensolaris and mount one of the drives from
the raid1 array as an NTFS partition (because it is NTFS), and then create a
ZFS filesystem on the new drive. Copy all the data from the NTFS drive to the
new drive then add the other two drives to create a raidZ array making sure it
copies the parity data from the first drive.
Is this the correct way of doing it? What commands do I need to use to create
the raidZ array from a single ZFS drive.
Thanks.
Let's call your current drives A & B, and the new drive you are going to
get C, and furthermore, assume that:
A = c0t0d0
B = c0t1d0
C = c0t2d0
I'm also assuming you have other drives which are going to hold the OS -
that is, these drives are only for data, not the OS.
Step 1: Break the mirror of A & B inside Windows 7
Step 2: Purchase the new C hard drive, and install it in the case.
Step 3: Boot to OpenSolaris
Step 4: Make sure you've gone out and installed the NTFS driver (
http://sun.drydog.com/faq/9.html )
Step 5: mount drive A: mount -F ntfs /dev/dsk/c0t0d0p0 /mnt
Step 6: create a "dummy" drive as a sparse file: mkfile -n
1500G /foo
Step 7: create the new RaidZ array, using the dummy drive:
zpool create tank raidz c0t1d0 c0t2d0 /foo
Step 8: remove the dummy drive: zpool offline tank /foo
Step 9: copy all the data from the NTFS drive to the new drive:
cd /mnt; cp -rp . /tank
Step 10: kill the NTFS partition info: run "format" and delete
everything
Step 11: add the erased NTFS drive to the new raidZ: zpool
replace -f tank /foo c0t0d0
Step 12: delete the dummy file: rm /foo
Wait for the raidz to reconstruct (resilver) - this may take quite some
time.
Done!
If you are using the existing mirrored pair to actually boot in Windows
7 (i.e. as the boot drives), then you can't create a raidz for
OpenSolaris - OpenSolaris can only boot from a mirrored root pool, not a
raidz of any kind.
--
Erik Trimble
Java System Support
Mailstop: usca22-123
Phone: x17195
Santa Clara, CA
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