[CentOS] Best practice preparing for disk restoring system

Wed Nov 18 07:46:45 UTC 2020
Felix Kölzow <felix.koelzow at gmx.de>

On 18/11/2020 03:35, H wrote:
> On November 17, 2020 4:07:52 PM EST, "Felix Kölzow" <felix.koelzow at gmx.de> wrote:
>> Maybe "rear" is an appropriate solution for you?
>>
>> https://relax-and-recover.org/
>>
>> On 17/11/2020 18:23, Chris Schanzle via CentOS wrote:
>>> I would include LVM and mdadm info as well, since I use those
>> features.  I encourage you to look at what long-lived tools, such as
>> clonezilla, write into their archive directories.  It's impressive.
>>> If you zero out all free space on all of your HDD partitions (dd
>> bs=1M if=/dev/zero of=/path/deleteme; rm /path/deleteme) or use
>> 'fstrim' for SSD's, you could use dd to image with fast & light
>> compression (lzop or my current favorite, pzstd) and get maximum
>> benefit of a bit-by-bit archival copy.
>>>
>>> On 11/16/20 11:02 PM, H wrote:
>>>> Short of backing up entire disks using dd, I'd like to collect all
>> required information to make sure I can restore partitions, disk
>> information, UUIDs and anything else required in the event of losing a
>> disk.
>>>> So far I am collecting information from:
>>>> - fdisk -l
>>>> - blkid
>>>> - lsblk
>>>> - grub2-efi.cfg
>>>> - grub
>>>> - fstab
>>>>
>>>> Hoping that this would supply me with /all/ information to restore a
>> system - with the exception of installed operating system, apps and
>> data.
>>>> I would appreciate any and all thoughts on the above!
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> Thank you, that tool is new to me but looks very interesting!
> _______________________________________________

Yes, indeed. Up to now, I have very good experience with that. Setup new
server. Create "rear" backup on USB, nfs-share or more secure via

sshfs. Destroy Raid, Create new Raid. boot from rescure image. type
"rear recover". DONE. All that in less than 10 minutes.