Date: Mon, 27 Jan 2014 12:39:27 +0000 From: Kaya Saman <kayasaman@gmail.com> To: =?ISO-8859-1?Q?Trond_Endrest=F8l?= <Trond.Endrestol@fagskolen.gjovik.no> Cc: freebsd-questions <freebsd-questions@freebsd.org> Subject: Re: ZFS confusion Message-ID: <52E6537F.8020907@gmail.com> In-Reply-To: <alpine.BSF.2.00.1401271309090.4811@mail.fig.ol.no> References: <52E40C82.7050302@gmail.com> <alpine.BSF.2.00.1401270944100.4811@mail.fig.ol.no> <52E62DFF.3010600@gmail.com> <alpine.BSF.2.00.1401271149160.4811@mail.fig.ol.no> <52E6463C.6090805@gmail.com> <alpine.BSF.2.00.1401271309090.4811@mail.fig.ol.no>
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On 01/27/2014 12:12 PM, Trond Endrestøl wrote:
> On Mon, 27 Jan 2014 11:42-0000, Kaya Saman wrote:
>
>> Many thanks everyone (Trond, Dennis, Steve)!!
>>
>> So RAIDz2 or 3 is going to be preferred per the advice given.
>>
>> Now I just need to figure out how to make that work best with my current 5
>> block of disks.... perhaps wait for a while then add some more disks in the
>> mix then create the raidz(x) platform??
>>
>> It would be really good if raidz could be expandable, ie by adding extra 'new'
>> disks into the same vdev.
> It's there!
>
> Try: zpool attach <pool_name> <existing_member> <new_member1> [new_member2 ...]
>
>
Yep, though of course as I'm just testing with temp files currently I
was unable to make it work:
zpool attach test_pool /tmp/disk1 /tmp/disk6
cannot attach /tmp/disk6 to /tmp/disk1: can only attach to mirrors and
top-level disks
This is ok though as my block of 5 disks arrive tomorrow with the
chassis arriving either tomorrow or day after that.
Does 'attaching' create a hybrid raidz2/3 + 1 array or am I confusing again?
Being familiar with raid 1 and 0, I know that the attach command will
simply mirror a disk:
zpool attach <pool> disk1 disk2
would create a raid1 mirror between the disks... is this the same
principle or does the command function differently in raidz?
Just checking out the man page gives this:
zpool attach [-f] pool device new_device
Attaches new_device to an existing zpool device. The existing
device
cannot be part of a raidz configuration. If device is not
currently
part of a mirrored configuration, device automatically transforms
into a two-way mirror of device and new_device. If device is
part of
a two-way mirror, attaching new_device creates a three-way mirror,
and so on. In either case, new_device begins to resilver
immediately.
-- unless things have been updated since my FBSD version?
Regards,
Kaya
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