Dotaz: MD RAID1 chyba?

[bman]

pri boote mi vyhadzuje toto:

Oct  1 03:34:41 maria kernel: md: hdc12 has different UUID to hdc13
Oct  1 03:34:41 maria kernel: md: hdc11 has different UUID to hdc13
Oct  1 03:34:41 maria kernel: md: hdc9 has different UUID to hdc13
Oct  1 03:34:41 maria kernel: md: hdc8 has different UUID to hdc13
Oct  1 03:34:41 maria kernel: md: hdc7 has different UUID to hdc13
Oct  1 03:34:41 maria kernel: md: hdc6 has different UUID to hdc13
Oct  1 03:34:41 maria kernel: md: hdc5 has different UUID to hdc13
Oct  1 03:34:41 maria kernel: md: hdc2 has different UUID to hdc13
Oct  1 03:34:41 maria kernel: md: hdc1 has different UUID to hdc13
Oct  1 03:34:41 maria kernel: md:  adding hda13 ...
Oct  1 03:34:41 maria kernel: md: hda12 has different UUID to hdc13
Oct  1 03:34:41 maria kernel: md: hda11 has different UUID to hdc13

je to chyba alebo funkcia... neviem co si mam o tom mysliet.. RAID1 + XFS filesystem...

Odpovědi

[bman]

asi sa priklanam k tomuto nazoru vygogleneho z netu:

Is there a problem with my RAID1 arrays or is there something I can do to get rid of them ? At least to me, they don't seem to mean much (I'm guessing that UUID is some sort of unique identifier, identifying the component devices of the MD devices, and this message indicates that the RAID subsystem is looking for RAID1 component device pairs), and all they end up doing is filling up my kernel buffer before syslogd/klogd starts, which means I loose some of my other boot status messages, which I think I would find more useful eg. early PCI setup / ACPI etc.

[rajo AT platon.sk]

Nie, nie je to chyba. To je postupne hladanie jednotlivych diskov tvoriacich raid. Ked si vsimne blizsie tie hlasky, tak ti postupne s detekovanymi raid particiami pocet porovnavanych zariadeni postupne klesa.

Dolezity je stav raidu, vid 'cat /proc/mdstat'. Tam by si mal vidiet iba '[UU]' a ziadne '[U_]'. Inac by to znamenalo, ze ti zlyhal jeden disk alebo ze si to ty manualne prepol do degradovaneho stavu (napr. kvoli prarabaniu tabulky particii na jednom z diskov, ale to musis vediet, ze co robis).

Napr.:

# cat /proc/mdstat
Personalities : [raid0] [raid1] 
md1 : active raid1 hdc6[1] hda9[0]
      1953408 blocks [2/2] [UU]
      
md7 : active raid1 hdc7[1] hda10[0]
      41017408 blocks [2/2] [UU]
      
md6 : active raid0 hdc8[1] hda11[0]
      150133248 blocks 4k chunks
      
md0 : active raid1 hdc5[1] hda8[0]
      488704 blocks [2/2] [UU]
      
unused devices: <none>

[bman]

dik, to som xcel pocut :)