Changes between Initial Version and Version 1 of DiscosRaid

Timestamp:

Aug 19, 2010, 8:39:00 PM (14 years ago)

Author:

sebas@…

Comment:

--

DiscosRaid

@@ +1 @@
+== identificar bien los discos ==
+
+Usar el comando
+{{{
+# hdparm -I /dev/sdb | less
+/dev/sdb:
+ATA device, with non-removable media
+        Model Number:       Hitachi HDS721010CLA332                 
+        Serial Number:      JP2930HQ0WGG0H
+        Firmware Revision:  JP4OA39C
+        Transport:          Serial, ATA8-AST, SATA 1.0a, SATA II Extensions, SATA Rev 2.5; Revision: ATA8-AST T13 Project D1697 Revision 0b
+.....
+}}}
+
+== Agregar Nuevo Disco ==
+
+ * Copiar tabla de particiones un disco al nuevo
+{{{
+# sfdisk -d /dev/sda | sfdisk --no-reread /dev/sdb --force
+}}}
+
+
+ * Agregar al raid1 el nuevo disco (sdb)
+
+{{{
+# mdadm --add /dev/md0 /dev/sdb2
+# mdadm --add /dev/md1 /dev/sdb5
+# mdadm --add /dev/md2 /dev/sdb6
+}}}
+
+
+
+ * Quitar particion al raid1 
+
+{{{
+# mdadm --fail /dev/md0 /dev/sdb2
+# mdadm -r /dev/md0 /dev/sdb2
+}}}
+
+ *  más info:
+
+http://www.ducea.com/2009/03/08/mdadm-cheat-sheet/
+
+http://svn.debian.org/wsvn/pkg-mdadm/mdadm/trunk/debian/README.recipes?op=file&rev=0&sc=0
+
+https://wiki.koumbit.net/RaidRecovery
+
+ * Si los discos se salen del array
+
+Puede ser que los cause el smartd con el kernel. http://kerneltrap.org/mailarchive/linux-scsi/2009/9/14/6409773
+
+ * Grub al disco (para que varios puedan bootear sin que se rompan)
+{{{
+# grub
+Probing devices to guess BIOS drives. This may take a long time.
+[...]
+grub> device (hd0) /dev/sdb
+device (hd0) /dev/sdb
+grub> root (hd0,0)
+root (hd0,0)
+ Filesystem type is ext2fs, partition type 0xfd
+grub> setup (hd0)
+setup (hd0)
+ Checking if "/boot/grub/stage1" exists... yes
+ Checking if "/boot/grub/stage2" exists... yes
+ Checking if "/boot/grub/e2fs_stage1_5" exists... yes
+ Running "embed /boot/grub/e2fs_stage1_5 (hd0)"...  16 sectors are embedded.
+succeeded
+ Running "install /boot/grub/stage1 (hd0) (hd0)1+16 p (hd0,1)/boot/grub/stage2 /boot/grub/menu.lst"... succeeded
+Done.
+}}}
+
+ * Cambiar de posición el disco ( slot number )
+{{{
+mdadm --detail /dev/md1
+Number Major Minor RaidDevice State
+0 0 0 0 removed
+1 8 17 1 active sync /dev/sdb1
+What I wanted to do is to move the device /dev/sdb1 to slot 0 from slot 1. And I found I could do that by running mdadm in grow mode with the degraded Raid 1 array:
+mdadm --grow --force -n 1 /dev/md1
+mdadm --detail /dev/md1
+Number Major Minor RaidDevice State
+0 8 22 0 active sync /dev/sdb1
+mdadm --grow -n 2 /dev/md1
+mdadm --detail /dev/md1
+Number Major Minor RaidDevice State
+0 8 17 0 active sync /dev/sdb1
+1 0 0 1 removed
+
+Then add a new device into md1
+mdadm /dev/md1 -a /dev/sda1
+mdadm: hot added /dev/sda1
+}}}
+
+http://piiis.blogspot.com/2009/03/change-slot-number-of-raid-1-device-by.html