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Date:      Mon, 24 Aug 2020 03:07:18 -0700
From:      David Christensen <dpchrist@holgerdanske.com>
To:        freebsd-questions@freebsd.org
Subject:   Re: adding disk to zfs mirror after removal of disk
Message-ID:  <338afe71-1e76-16fc-8315-d38785438248@holgerdanske.com>
In-Reply-To: <20200824020207.GB17289@bastion.zyxst.net>
References:  <20200821230206.GA56267@bastion.zyxst.net> <ab5857f4-cdc7-b589-1b39-5d2fb550ad5b@holgerdanske.com> <20200822050431.GA17289@bastion.zyxst.net> <9274f688-2897-8d0b-d799-100316684b06@holgerdanske.com> <20200824020207.GB17289@bastion.zyxst.net>

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On 8/23/20 7:02 PM, tech-lists wrote:

> In the end, I deleted the pool and re-created it ...

Deleting and recreating definitely has its advantages.


> Seems what I should have done is zpool replace ada3 ada3 after fixing the
> failing disk, in order to retain the mirror.

The "diskid..." nodes incorporate drive make, model, and serial number, 
which is appealing because the node name is machine-generated 
(precluding typographic errors), unique, and matches the physical label 
on the drive.  This is probably the best answer if you have a lot of 
disks.  So (see [1]):

# zpool replace wd ada3 diskid/DISK-WD-WCC...


But deleting the pool and starting over gives you the opportunity to 
create and use human-friendly labels.  I have a dozen or so data and 
backup disks, and I use GPT with labels.


It is nice to have multiple good options.  :-)


> Funny you mention this, I'm doing ... cvs too ...  on a dedicated machine.

A networked version control system is very useful for system 
administration, among other things.  I don't know how people get by 
without one.


My CVS repository is in a jail on my SOHO server, along side a jail for 
Samba.  Every time I work on that machine, I lose CVS support.  I have 
contemplated moving CVS to my old laptop for just this reason.  But what 
I really want is to configure another server identically and set up HA 
for both services.


> thanks for your help,

YW.  I'm glad it worked out.  :-)


David


[1] https://docs.oracle.com/cd/E19253-01/819-5461/gbcet/index.html



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