Re: [zfs-discuss] Can you create a degraded raidz vdev?

[Matthew Ahrens]

Chris Csanady wrote:

On 6/14/07, Paul Hedderly [EMAIL PROTECTED] wrote:


Is this currently possible?


You may be able to do this my specifying a sparse file for the last
device, and then immediately issuing a zpool offline of it after the
pool is created.  It seems to work, and I was able to create a pool
that way with no complaints.

You can create a 400GB sparse file with something like:

dd if=/dev/zero bs=1024k count=1 seek=40 of=/path/to/vdev_file


Alternatively:
mkfile -n 400g

--matt
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Re: [zfs-discuss] Can you create a degraded raidz vdev?

[Ruben Wisniewski]

Hi Paul,

I think I have a smiliar problem, I have 4 disks, two empty, two full
and want to create a RAIDZ1 from these disk.

But I'm new to zfs, maybe you can explain me how do you done it, if it
runs :)

Thanks in advance :)


Greetings Cyron

 I have 6 400GB discs and want to make two RAIDZ 2/1 vdevs out of them
 (ie 2stripe 1parity).
 
 The problem is that 4 are in use... so I want to do something like:
 
   zpool create datadump raidz c1t0d0 c1t1d0 missing
 
 Then move and bunch of data into datadump, to free up another two
 discs, then
 
   zpool add datadump raidz c1t2d0 c1t3d0 missing
 
 Now move the rest of the data over, freeing the last two drives which
 I would then add as spares to let zfs complete the parity of those
 vdevs.


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