On Sun, May 24, 2020 at 12:09:31PM -0400, Harry Putnam wrote:
> I use simple mirrored pairs for yrs now.
> This is not a commercial operation or even a very serious homeboy HOST.
I use mirrored pairs too. Disks do fail. The system just keeps on
going in this configuration.
> I had a disk failure some time ago that is one of the mirrored boot
> disks. I have yet to fix that.
>
> They were a pair of 700 GB disks I had on hand so used them for the
> boot root disk pair some yrs ago now. They are now a bit old and may
> be hard to replace with matching new disk
>
> . . . (Hope this doesn't all just sound like gobbledy goop) ...
>
> Because of the hefty 700gb size for root OS and boot bits, overtime
> I've allowed data filesystems to creep onto them.
You may not be able to find a disk that small anymore. 1TB is about
the smallest available now. I use a pair of these as data disks, and
a pair of SSDs for the OS. The SSDs are faster than rotating disks,
of course. I get the smallest SSDs I can find. That is about
120GB these days.
> Of course I need to replace the bad disk.
>
> I want to reduce the size of the boot disks anyway and totally avoid
> having any data but OS on them. So, first off I will get the extra FS
> off of working boot disk. (I currently have plenty of room)
>
> So wondering a bit about how to proceed from there.
>
> I think I'd like to replace the bad disk with new 250 GB HDD.
You can certainly start by replacing the bad disk with a 1TB disk.
Then, you can replace the other one. zfs will do all of that easily.
That may be all you need to do.
> Assuming the data on the remaining boot 700gb disk is smaller than 250
> gb, (In the actual case it will be a good bit smaller and only contain
> OS) will the silvering of new smaller disk work?
>
> Will the 700 GB and 250 GB be able to pair that way?
I'd recommend larger data disks and smaller boot disks, both mirrored.
This may not be possible, depending on how many disk slots your case
has. There are brackets that allow two SSDs to fit in one slot.
Still, you'd need three slots.
> Will it be possible to transfer the boot bits to the new 250 GB?
I've never done that. There is a way to transfer the boot device to
a new device. I recall that was safe and fairly easy, but I haven't
done that for a while. Most of the work was done by:
beadm create ... -p ...
--
-Gary Mills- -refurb- -Winnipeg, Manitoba, Canada-
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