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Raid 1+0 O 0+1

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Midle End Level

osky

entradas: 203

13:35 24/09/2009

1

que tal amigos estoy pensando en comprar 2 WD caviar black de 500gb y 32mb de buffer para armar un raid, el tema es que no se que configuracion me convien (cual es la mas comun) y tampoco como hacerlo

tengo un mother asus maximus formula (x38) lei por ahi algo del matrix storage ncq, que es mas facil de configurar y hacer varias particiones.

recomendaciones por favor y lo mas importante… vale la pena??

perdon por la ignorancia, pero busque y no esta del todo claro el tema

saludos

…AMIGOS SON LOS QUE SE HIEREN CON LA VERDAD PARA NO DESTRUIRSE CON LA MENTIRA…

[SIGPIC]ok[/SIGPIC]

Extreme Level

Chris

sadsad

entradas: 1605

13:50 24/09/2009

2

RAID 0+1: We stripe together drives 1, 2, 3, 4 and 5 into RAID 0 stripe set "A", and drives 6, 7, 8, 9 and 10 into RAID 0 stripe set "B". We then mirror A and B using RAID 1. If one drive fails, say drive #2, then the entire stripe set "A" is lost, because RAID 0 has no redundancy; the RAID 0+1 array continues to chug along because the entire stripe set "B" is still functioning. However, at this point you are reduced to running what is in essence a straight RAID 0 array until drive #2 can be fixed. If in the meantime drive #9 goes down, you lose the entire array.

RAID 1+0: We mirror drives 1 and 2 to form RAID 1 mirror set "A"; 3 and 4 become "B"; 5 and 6 become "C"; 7 and 8 become "D"; and 9 and 10 become "E". We then do a RAID 0 stripe across sets A through E. If drive #2 fails now, only mirror set "A" is affected; it still has drive #1 so it is fine, and the RAID 1+0 array continues functioning. If while drive #2 is being replaced drive #9 fails, the array is fine, because drive #9 is in a different mirror pair from #2. Only two failures in the same mirror set will cause the array to fail, so in theory, five drives can fail–as long as they are all in different sets–and the array would still be fine.

Clearly, RAID 1+0 is more robust than RAID 0+1. Now, if the controller running RAID 0+1 were smart, when drive #2 failed it would continue striping to the other four drives in stripe set "A", and if drive #9 later failed it would "realize" that it could use drive #4 in its stead, since it should have the same data. This functionality would theoretically make RAID 0+1 just as fault-tolerant as RAID 1+0. Unfortunately, most controllers aren't that smart. It pays to ask specific questions about how a multiple RAID array implementation handles multiple drive failures, but in general, a controller won't swap drives between component sub-arrays unless the manufacturer of the controller specifically says it will.

Extreme Level

viper713

entradas: 1374

18:06 24/09/2009

3
Cita Iniciado por Chris
Ver Mensaje
RAID 0+1: We stripe together drives 1, 2, 3, 4 and 5 into RAID 0 stripe set "A", and drives 6, 7, 8, 9 and 10 into RAID 0 stripe set "B". We then mirror A and B using RAID 1. If one drive fails, say drive #2, then the entire stripe set "A" is lost, because RAID 0 has no redundancy; the RAID 0+1 array continues to chug along because the entire stripe set "B" is still functioning. However, at this point you are reduced to running what is in essence a straight RAID 0 array until drive #2 can be fixed. If in the meantime drive #9 goes down, you lose the entire array.

RAID 1+0: We mirror drives 1 and 2 to form RAID 1 mirror set "A"; 3 and 4 become "B"; 5 and 6 become "C"; 7 and 8 become "D"; and 9 and 10 become "E". We then do a RAID 0 stripe across sets A through E. If drive #2 fails now, only mirror set "A" is affected; it still has drive #1 so it is fine, and the RAID 1+0 array continues functioning. If while drive #2 is being replaced drive #9 fails, the array is fine, because drive #9 is in a different mirror pair from #2. Only two failures in the same mirror set will cause the array to fail, so in theory, five drives can fail–as long as they are all in different sets–and the array would still be fine.

Clearly, RAID 1+0 is more robust than RAID 0+1. Now, if the controller running RAID 0+1 were smart, when drive #2 failed it would continue striping to the other four drives in stripe set "A", and if drive #9 later failed it would "realize" that it could use drive #4 in its stead, since it should have the same data. This functionality would theoretically make RAID 0+1 just as fault-tolerant as RAID 1+0. Unfortunately, most controllers aren't that smart. It pays to ask specific questions about how a multiple RAID array implementation handles multiple drive failures, but in general, a controller won't swap drives between component sub-arrays unless the manufacturer of the controller specifically says it will.

Esta información no aplica para Intel Matrix Storage Manager

Cita Iniciado por osky
Ver Mensaje
que tal amigos estoy pensando en comprar 2 WD caviar black de 500gb y 32mb de buffer para armar un raid, el tema es que no se que configuracion me convien (cual es la mas comun) y tampoco como hacerlo

tengo un mother asus maximus formula (x38) lei por ahi algo del matrix storage ncq, que es mas facil de configurar y hacer varias particiones.

recomendaciones por favor y lo mas importante… vale la pena??

perdon por la ignorancia, pero busque y no esta del todo claro el tema

saludos

Con Intel Matrix Storage Manager, se pueden realizar únicamente arreglos de raid 0, 1, 5 y 10.
Con 2 HDD, únicamente se pueden realizar arreglos en raid 0 o raid 1.

Moderador

legion

Argentina

entradas: 15626

18:10 24/09/2009

4

Si – Vale la pena en lecto/escritura.- en Raid O
Podes gastar menos con 2 WD3200AAKS firmware AO del 2009 Malaysia.-
Los mejores HD para Raid son los WD RE3 107 doloritos c/u de 320.-

  http://img6.imageshack.us/img6/3812/pipikuku.th.png  Patres _ Semper  immoti  et  digni -   


Midle End Level

osky

entradas: 203

19:42 24/09/2009

5
Cita Iniciado por legion
Ver Mensaje
Si – Vale la pena en lecto/escritura.- en Raid O
Podes gastar menos con 2 WD3200AAKS firmware AO del 2009 Malaysia.-
Los mejores HD para Raid son los WD RE3 107 doloritos c/u de 320.-

lei algo, pero son mejores que 2 caviar black con 32 de bufer??? como es la onda?

gracias

…AMIGOS SON LOS QUE SE HIEREN CON LA VERDAD PARA NO DESTRUIRSE CON LA MENTIRA…

[SIGPIC]ok[/SIGPIC]

Moderador

legion

Argentina

entradas: 15626

19:52 24/09/2009

6

Esa es la explicaciòn.-
* Recuperación de errores en tiempo limitado (TLER), específica de RAID. – Evita que el disco deje de funcionar a causa de los extensos procesos de recuperación de errores que son comunes en los discos de escritorio.
* StableTrac™ – El eje del motor está asegurado en ambos extremos para reducir la vibración inducida por el sistema y estabilizar las placas para un rastreo preciso durante las operaciones de lectura y escritura.

  http://img6.imageshack.us/img6/3812/pipikuku.th.png  Patres _ Semper  immoti  et  digni -   


Hardcore Extreme Level

Rey Maximo

entradas: 6071

19:56 24/09/2009

7

son buenos esos discos no te preocupes, te conviene armar RAID 0 es mucho mas veloz, el RAID 1 es por si tenes datos muy muy importantes y se te llega a caer un disco no los pierdas y puedas seguir utilizando la pc con normalidad, pero es mas lento en la escritura…
Si queres raid 10 necesitas 4 discos…
pero si no trabajas con datos sumamente importantes poca falta hace. Saludos!