RAID

[Christos Ricudis]

P. Christeas wrote:

> On Τετάρτη 18 Απρίλιος 2007, Antonis Christofides wrote:
>> Για να κάνω backup το server ...
> 
> Καλά κάνουμε και το συζητάμε το θέμα εδώ μέσα..
> Ερώτηση: Απ΄ όλα αυτά τα RAID που λέμε, σας έχει τύχει να χτυπήσουν δίσκοι 
> κλπ; Τότε τί έγινε, δούλεψε το RAID στην πράξη; 
> 
> 
> 

Nai, bebaiws.

Xtyphmenos diskos se 3ware / highpoint HW raid controller :

Pleonekthma : Douleyeis me degraded array, xwris kanena problhma. To 
xtyphmeno device bgainei aytomatws offline.

Meioneithma : To gegonos oti den exei kanena problhma, shmainei oti 
argeis poly na pareis xampari to xtyphmeno disko.



Xtyphmenos diskos se Linux software raid :

Pleonekthma : Douleyeis me degraded array, me "minor" performance problems.

Meionekthma : To xtyphmeno device mporei na bgei aytomatws offline, 
mporei kai oxi, analogws me th fash ths selhnhs kai to ti efages prox8es 
to meshmeri.



Xtyphmenos diskos se Solaris md software raid :

Pleonekthma : Molis xtyphsei ena device, trws kernel panic. Sto epomeno 
reboot, trws ena endless loop apo reboots kai kernel panics apo ton md 
driver. Ayto einai megalo pleonekthma, epeidh etsi APOKLEITAI na mhn 
pareis xampari to xtyphmeno device.

Gia na kaneis rebuild (h genikotera manage) to array, xreiazesai eite na 
diabazeis KA8E fora to manual (poy einai megalo pleonekthma giati 
freskareis tis gnwseis sou) eite na 8ymasai ta md administration 
commands ap'eksw (pou einai megalo pleonekthma giati sou dinei sigourh 
endeiksh oti xreiazesai epeigontws psyxiatro).

Meionekthma : Nothing. We're SUN.



Disclaimer. Gia na mhn nomizei kanenas oti ginomai kakos me thn sun, 
paradexomai dhmosiws enwpiwn olwn, oti ftiaxnoun ekplhktika mousepads. 
Lepta, akribws oso prepei elastika, den kseftizoun stis gwnies, kai 
exoun wraio sxedio. Ta synistw anepifylakta.


-- 
Christos Ricudis				ricudis at itc.auth.gr
Systems Administrator				+30-2310-998656
IT Support Center
Aristotle University of Thessaloniki, GREECE