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

[David T-G <davidtg-robot@justpickone.org>]

Hello!

...and then c.buhtz@posteo.jp said...
% 
...
% /dev/sdc (as discs without partitions) are configured as RAID1

This is fine, although it makes me queasy; I always create a partition
table and use a partition as a RAID device, and I leave a sliver at the
back end to hold useful information when the array is completely toasted.
But that's just me :-)


% /dev/md127 and formated with ext4 and mounted to /Daten. I can read
% and write without any problems to the RAID.

On the other hand, this part is interesting ...


% 
...
% 
% Here is the output of my fdisk -l. Interesting here is that
% /dv/md127 is shown but without its filesysxtem.
% 
...
% >Disk /dev/md127: 8 GiB, 8580497408 bytes, 16758784 sectors
% >Units: sectors of 1 * 512 = 512 bytes
% >Sector size (logical/physical): 512 bytes / 512 bytes
% >I/O size (minimum/optimal): 512 bytes / 512 bytes
% 
...
% >/dev/md127 on /Daten type ext4 (rw,relatime)
% 
...
% >UUID=65ec95df-f83f-454e-b7bd-7008d8055d23 /               ext4
% >errors=remount-ro 0       1
% >
% >/dev/md127  /Daten      ext4    defaults    0   0

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 conclusion is
supported by your mount point (/dev/md127 rather than /dev/md127p1 or
similar) and your fstab entry (same).

So the display isn't interesting, although the logic behind that approach
certainly is to me.


HTH & HAND

:-D
-- 
David T-G
See http://justpickone.org/davidtg/email/
See http://justpickone.org/davidtg/tofu.txt