[Cialug] ubuntu disk storage

[Barry Von Ahsen]

that means some process has a resource open on /home, probably the shell that you logged into initially (unless you logged in directly as root)

lsof can help you find it 




-barry




> On Feb 24, 2022, at 1:20 PM, chris at bynw.com wrote:
> 
> 
> The original home directory on the main physical drive is still there and just renamed to home_backup. It hasn't been deleted or anything.
> 
> But when I try to reverse the instructions given at the website in my previous email (see below). I can't rename the current home directory to something else. I always get a message the resource is busy. Would I have to unmount it rename it and thus force the system to see the original directory?
> 
> Or could that be done in recovery or emergency mode?
> 
> Thoughts? I'm trying to avoid having to wipe and restart from scratch if possible.
> 
> Thanks
> 
> On 2022-02-24 10:10, chris at bynw.com wrote:
>> I am thinking this is going to be the best course of action. I want to
>> preserve more than just the /home directory though. There are other
>> things running that need to be preserved. But of course I don't want
>> the LVM setup.
>> On 2022-02-22 11:49, Scott Yates wrote:
>>> Your best bet is to pull a full backup of /home and start over I would
>>> think.
>>> LVM does not do redundancy.  For that you need mdadm i think, and
>>> preferably, zfs for it's block level corruption self healing.
>>> On Tue, Feb 22, 2022 at 11:46 AM <chris at bynw.com> wrote:
>>>> I did explain that if we moved the /home directory to the LVM space
>>>> there could be a loss if one of the physical drives in the LVM space
>>>> died. It wasn't a concern. So I followed the instructions here:
>>>> https://techsparx.com/linux/disks/ubuntu-move-home.html to move /home to
>>>> the "2nd drive" aka the LVM space.
>>>> But since the weekend has passed he's changed his mind. And wants the
>>>> LVM space to be a RAID so the /home directory doesn't die without some
>>>> form of redundancy.
>>>> I'm not sure I can move the /home back to the main drive or change the
>>>> LVM space to a RAID without totally redoing things on the LVM but that
>>>> would also mean I have to move the /home directory back to the primary
>>>> drive. And I cant figure out how to get that done.
>>>> -Chris
>>>> On 2022-02-18 15:11, L. V. Lammert wrote:
>>>> > On Fri, 18 Feb 2022 chris at bynw.com wrote:
>>>> >
>>>> >> Actually Dave's response and the others have been very helpful on this
>>>> >> little learning project. Thank you so much.
>>>> >> Next question ..... can I move the /home directory to this LVM space??
>>>> >>
>>>> > Sure, ... but remember, there is no redundance with LVM - a LVM is
>>>> > "logical", and relies on the underlying "physical" layer to provide
>>>> > reduncancy a la RAID.
>>>> >
>>>> > All LVM provides is the ability to span multiple physical partitions
>>>> > into
>>>> > a single logical partition, .. if one drive dies, everything is toast
>>>> > unless the physical volumes are part of a RAID configuration.
>>>> >
>>>> > That is the main reason I prefer RAID6 over LVM - much easier to
>>>> > extend,
>>>> > and much simpler to manage with mdadm.
>>>> >
>>>> >       Lee
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