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operations:raid [2017/12/22 15:28]
eServices Greece 		operations:raid [2020/04/29 15:25] (current)
eServices Greece
Line 10: Line 10:
 <sxh bash> <sxh bash>
 sfdisk --force /dev/sda < partitions sfdisk --force /dev/sda < partitions
 +</sxh>
 +
 +=== In one step ===
 +<sxh bash>
 +sfdisk -d /dev/sda | sfdisk /dev/sdb
 </sxh> </sxh>
  
Line 18: Line 23:
 </sxh> </sxh>
  
-==== Check RAID Status ====+===== Check RAID Status =====
 <sxh bash> <sxh bash>
 cat /proc/mdstat cat /proc/mdstat
Line 24: Line 29:
  
 ==== Remove a Malfunctioning Disk ==== ==== Remove a Malfunctioning Disk ====
 +Do the Folloing for all partitions of the malfunctioning disk. Note that mark as faill is not necessary or even possible in case the disk is not detected anymore from the OS.
 +
 +Mark partition as failed
 <sxh bash> <sxh bash>
 +mdadm --manage /dev/md0 --fail /dev/sda1
 </sxh> </sxh>
  
 +Remove Partition
 +<sxh bash>
 +mdadm --manage /dev/md0 --remove /dev/sda1
 +</sxh>
  
 +==== Add New Disk in Array ==== 
 +Repeat for all required partitions
 <sxh bash> <sxh bash>
 +mdadm --manage /dev/md0 --add /dev/sda1
 </sxh> </sxh>
  
 +===== Destroy Metadata =====
 +Warning: select the correct physical disk (/dev/sda in example)
 +<sxh bashdd if=/dev/zero of=/dev/sda bs=512 count=8196
 +dd bs=512 if=/dev/zero of=/dev/sda count=8196 seek=$((`blockdev --getsz /dev/sda` - 8196))</sxh>