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--- informatica:linux:raid [2015/01/11 10:06] – [Cambiar un disco] javi
+++ informatica:linux:raid [2015/01/11 12:00] – javi
@@ Line 444: / Line 444: @@
 http://scotgate.org/?p=107
+===== Cambiar disco en frio (apagando server) =====
+. Apagar servidor
+. Desconectar disco que creemos que falla
+. Arrancar servidor
+. Entrar en la BIOS
+  supr
+. Comprobar que el unico disco conectado es master. En mi caso en la BIOS Asus:
+  SATA6G_1
+. (Opcional) si el disco no estaba como master apagar servidor y conectar el disco como master cambiando cables y encender de nuevo
+. Arrancar servidor
+. Tocar flecha arriba/abajo para que muestre opciones de grub
+. Arrancar en modo recovery
+. Decir que se quiere arrancar el RAID degradado
+  y
+  Enter
+. Arrancar normal
+  TODO: provide menu label
+  Enter
+. Ver las pariciones del disco bueno, en mi caso /dev/sda
+  sudo fdisk /dev/sda
+<code>
+The device presents a logical sector size that is smaller than
+the physical sector size. Aligning to a physical sector (or optimal
+I/O) size boundary is recommended, or performance may be impacted.
+Command (m for help):
+</code>
+  p
+<code>
+Disk /dev/sda: 1000.2 GB, 1000204886016 bytes
+heads, 63 sectors/track, 121601 cylinders, total 1953525168 sectors
+Units = sectors of 1 * 512 = 512 bytes
+Sector size (logical/physical): 512 bytes / 4096 bytes
+I/O size (minimum/optimal): 4096 bytes / 4096 bytes
+Disk identifier: 0x000ab48f
+   Device Boot      Start         End      Blocks   Id  System
+/dev/sda1   *        2048  1953523711   976760832   fd  Linux RAID autodetect
+Command (m for help):
+</code>
+  q
+. Copiar el mismo particionado:
+.1. Crear particion
+  sudo fdisk /dev/sdb
+<code>
+The device presents a logical sector size that is smaller than
+the physical sector size. Aligning to a physical sector (or optimal
+I/O) size boundary is recommended, or performance may be impacted.
+Command (m for help):
+</code>
+  p
+<code>
+Disk /dev/sdb: 1000.2 GB, 1000204886016 bytes
+heads, 63 sectors/track, 121601 cylinders, total 1953525168 sectors
+Units = sectors of 1 * 512 = 512 bytes
+Sector size (logical/physical): 512 bytes / 4096 bytes
+I/O size (minimum/optimal): 4096 bytes / 4096 bytes
+Disk identifier: 0x4d1b267d
+   Device Boot      Start         End      Blocks   Id  System
+Command (m for help):
+</code>
+  n
+<code>
+Partition type:
+   p   primary (0 primary, 0 extended, 4 free)
+   e   extended
+Select (default p):
+</code>
+  Enter
+<code>
+Using default response p
+Partition number (1-4, default 1):
+</code>
+  Enter
+<code>
+Using default value 1
+First sector (2048-1953525167, default 2048):
+</code>
+  Enter
+<code>
+Using default value 2048
+Last sector, +sectors or +size{K,M,G} (2048-1953525167, default 1953525167):
+</code>
+  Enter
+<code>
+Using default value 1953525167
+Command (m for help):
+</code>
+  w
+<code>
+The partition table has been altered!
+Calling ioctl() to re-read partition table.
+Syncing disks.
+</code>
+.2. Cambiar label
+  sudo fdisk /dev/sdb
+<code>
+The device presents a logical sector size that is smaller than
+the physical sector size. Aligning to a physical sector (or optimal
+I/O) size boundary is recommended, or performance may be impacted.
+Command (m for help):
+</code>
+  t
+<code>
+Selected partition 1
+Hex code (type L to list codes):
+</code>
+  fd
+<code>
+Changed system type of partition 1 to fd (Linux RAID autodetect)
+Command (m for help):
+</code>
+  w
+<code>
+The partition table has been altered!
+Calling ioctl() to re-read partition table.
+Syncing disks.
+</code>
+. Ver estado del raid:
+  cat /proc/mdstat
+<code>
+Personalities : [linear] [multipath] [raid0] [raid1] [raid6] [raid5] [raid4] [raid10]
+md0 : active raid1 sda1[1]
+      976629568 blocks super 1.2 [2/1] [_U]
+unused devices: <none>
+</code>
+. Anyadir particion (en mi caso /dev/sdb1) al RAID (en mi caso md0)
+  sudo mdadm -a /dev/md0 /dev/sdb1
+<code>
+mdadm: added /dev/sdb1
+</code>
+. Ver progreso
+  cat /proc/mdstat
+<code>
+Personalities : [linear] [multipath] [raid0] [raid1] [raid6] [raid5] [raid4] [raid10]
+md0 : active raid1 sdb1[2] sda1[1]
+      976629568 blocks super 1.2 [2/1] [_U]
+      [>....................]  recovery =  0.0% (19072/976629568) finish=15349.0min speed=1059K/sec
+unused devices: <none>
+</code>
+. Install grub on the MBR of new hard disk
+  sudo grub-install /dev/sdb
+<code>
+/usr/sbin/grub-probe: warning: Couldn't find physical volume `(null)'. Some modules may be missing from core image..
+Installation finished. No error reported.
+</code>
+**TODO**: quiza esperar a que termine el rebuild