Legido Wiki

User Tools

Site Tools

Trace:
informatica:linux:raid

Differences

This shows you the differences between two versions of the page.

Link to this comparison view

Both sides previous revisionPrevious revision
Next revisionBoth sides next revision
informatica:linux:raid [2015/01/11 10:06] – [Cambiar un disco] javiinformatica:linux:raid [2015/01/11 11:59] – [Para mirar el estado del RAID] javi
Line 444: Line 444:
  
 http://scotgate.org/?p=107 http://scotgate.org/?p=107
 +
 +=== Cambiar disco en frio (apagando server) ===
 +
 +1. Apagar servidor
 +
 +2. Desconectar disco que creemos que falla
 +
 +3. Arrancar servidor
 +
 +4. Entrar en la BIOS
 +
 +  supr
 +
 +5. Comprobar que el unico disco conectado es master. En mi caso en la BIOS Asus:
 +
 +  SATA6G_1
 +
 +6. (Opcional) si el disco no estaba como master apagar servidor y conectar el disco como master cambiando cables y encender de nuevo
 +
 +7. Arrancar servidor
 +
 +8. Tocar flecha arriba/abajo para que muestre opciones de grub
 +
 +9. Arrancar en modo recovery
 +
 +10. Decir que se quiere arrancar el RAID degradado
 +
 +  y
 +  Enter
 +
 +11. Arrancar normal
 +
 +  TODO: provide menu label
 +  Enter
 +
 +12. 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
 +255 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
 +
 +13. Copiar el mismo particionado:
 +
 +13.1. 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
 +255 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>
 +
 +13.2. 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>
 +
 +14. 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>
 +
 +15. 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>
 +
 +16. 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>
 +
 +17. 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
  
  
informatica/linux/raid.txt · Last modified: 2020/11/15 13:11 by jose