Re: partitions & filesystems (was "Re: ???root account locked??? after removing one RAID1 hard disc")

[antlists <antlists@youngman.org.uk>]

On 30/11/2020 21:49, Reindl Harald wrote:
> 
> 
> Am 30.11.20 um 21:51 schrieb antlists:
>> On 30/11/2020 20:05, David T-G wrote:
>>> You don't see any "filesystem" or, more correctly, partition in your
>>>
>>>    fdisk -l
>>>
>>> output because you have apparently created your filesystem on the entire
>>> device (hey, I didn't know one could do that!). 
>>
>> That, actually, is the norm. It is NOT normal to partition a raid array
> 
> it IS normal for several reasons
> 
> * you may end with a replacement disk which is subtle
>    smaller and hence you normally make the partition
>    a little smaller then the device

And what does that have to do with the price of tea in China? 
Partitioning your array doesn't have any effect on whether or not said 
array uses the whole disk or not.
> 
> * in case of SSD you reserve some space for
>    better wear-levelling

And putting a partition table in your array does exactly what to help that?
> 
> * in case you ever need to reinstall your OS you
>    want your data not in the same filesystem

Which is why I partition my disk. I use one raid for the OS, and another 
for my data.

Cheers,
Wol