06 Sep, 2009

Chuleta de MDADM (Raid Software)

Posted by: leopoldomaestro In: Almacenamiento|Linux|RAID

Obtener información del RAID:

# cat /proc/mdstat

Detalles de las unidades RAID:

# mdadm –query /dev/md0

# mdadm –detail /dev/md0

Detalles de las unidades físicas:

# mdadm –query /dev/sdb1

# mdadm –examine /dev/sdb1

Administración de una RAID y sus discos

* Establecer un disco como faulty/failed:

$ sudo mdadm –fail /dev/md0 /dev/sdb1

No utilizar en RAID0 ó RAID en modo linear. Pueden perderse los datos!

* Quitar un disco fallido de una RAID:

$ sudo mdadm –remove /dev/md0 /dev/sdb1

* Limpiar cualquier información previa de un disco RAID (Ej. al reutilizar un disco de otra raid antigua)

$ sudo mdadm –zero-superblock /dev/sdb1

* Añadir un disco a la RAID

$ sudo mdadm –add /dev/md0 /dev/sdb1

* Añadir soporte “bitmap” a un RAID

$ sudo mdadm –grow /dev/mdX –bitmap=internal

* Quitar el soporte de “bitmap” a un RAID

$ sudo mdadm –grow /dev/mdX –bitmap=none

* Crear un RAID

mdadm --create --verbose /dev/md0 --level=1 /dev/sda1 /dev/sdb2

* Generar el mdadm.conf con la configuración actua

mdadm --detail --scan >> /etc/mdadm.conf

Fuente:  Ruddyger & Ducea

5 Respuestas en "Chuleta de MDADM (Raid Software)"

1 | burff

junio 19th, 2010 at 11:02 pm

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excelente uno nunca sabe cuando hace falta una chuleta asi

2 | burff

octubre 29th, 2011 at 5:38 pm

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si te falla creando el raid agrega –raid-devices=2

3 | fortato

junio 27th, 2012 at 9:53 am

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Gracias por el aporte. Ya he usado la chuleta varias veces.

4 | Sistema de discos en espejo, configurar RAID por software. | Jose Alberto Benítez Andrades

octubre 24th, 2013 at 10:24 am

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[…] Y os dejo también una “chuleta” de comandos mdam => http://www.leopoldomaestro.com/chuleta-de-mdadm-raid-software/ […]

5 | Paulo

julio 17th, 2014 at 11:13 pm

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