Evandro, boa tarde!
Ve se esse link te ajuda =>
https://oracle-base.com/articles/misc/oracle-and-raid
Abs
Em Terça-feira, 20 de Fevereiro de 2018 14:14, "[email protected]
[oracle_br]" <[email protected]> escreveu:
Blz ? Então, OBRIGATORIEDADE não existe (nem em lugar ** nenhum ** da
Documentação e nem em nota técnica NENHUMA do metalink vc vai achar uma
OBRIGATORIEDADE pra isso), mas é FORTEMENTE RECOMENDADO que os discos físicos
(e os disk volumes, óbvio) dentro de um diskgroup sejam IDÊNTICOS entre si,
tanto na questão de tamanho quanto na questão de tecnologia : a nota metalink
How to Prepare Storage for ASM (Doc ID 452924.1) diz isso com ** TODAS AS
LETRAS ** :
"
C) Recommendations for Storage Preparation. The following are guidelines for
preparing storage for
use with ASM:
1) Configure two disk groups, one for the datafile and the other for the Flash
Recovery Area. For availability purposes, one is used as a backup for the other.
2) Ensure that LUNs, which are disk drives of partitions, that ASM disk groups
use have similar storage performance and availability characteristics. In
storage configurations with mixed speed drives, such as 10K and 15K RPM, I/O
distribution is constrained by the slowest speed drive.
3) Be aware that ASM data distribution policy is capacity-based. LUNs provided
to ASM have the same capacity for each disk group to avoid an imbalance..
"
OK ? Viole essa Recomendação Oficial por sua conta e risco... Eu, se estivesse
no seu lugar, PRIMEIRO mandaria tirar a turma tirar o escorpião do bolso e
DISPENSAR esses RAID-5 se a máquina em questão é Produção E performance decente
é paradigma (vide http://www.baarf.dk/BAARF/BAARF2.html e os outros n+1!
materiais disponíveis) ...
APENAS SE REALMENTE não tiver outra solução, tapando o nariz eu SEM DÚVIDA
criaria um OUTRO diskgroup pra conter os tais discos RAID-5...
[]s
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