Differences

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--- deb9:mdadm [2023/01/14 16:46] – [Prepare RAID with single disk] Bernard Condrau
+++ deb9:mdadm [2024/04/03 15:07] – [Move RAID to a new machine] Bernard Condrau
@@ Line 34: / Line 34: @@
 | sdh |  sdh1     |  md3  | vg2            | /backup      |
-see also [[deb720:apsys|Hardware configuration]]
+see also [[hw:machines#apollo|Hardware configuration]]
 ==== Replace a failed RAID disk ====
@@ Line 111: / Line 111: @@
 ===== Prepare RAID with single disk =====
+==== Prepare new disk ====
+  - If the new disk contains partitions
+    - Stop any Raid partitions with<code>mdadm --stop /dev/md1
+mdadm --remove /dev/md1</code>
+    - Remove the superblocks<code>mdadm --zero-superblock /dev/sdX1</code>
+    - Remove existing partitions with ''fdisk /dev/sdX''
+  - Create a new partition utilizing the full disk space. When asked, remove the existing signature. Change partition type to ''Linux RAID''<code>sudo fdisk /dev/sdX
+Command (m for help): d
+Command (m for help): n
+Command (m for help): t,29</code>
+  - Create the RAID<code>mdadm --create /dev/mdX --level=raid1 --raid-devices=2 /dev/sdX1 missing</code>
+  - Check the RAID was created<code>cat /proc/mdstat
+ls /dev/md*</code>
 ==== Links ====
   * [[https://unix.stackexchange.com/questions/63928/can-i-create-a-software-raid-1-with-one-device|Can I create a software RAID 1 with one device]]
   * [[https://wiki.archlinux.org/title/Convert_a_single_drive_system_to_RAID|Convert a single drive system to RAID]]
+  * [[https://bobcares.com/blog/removal-of-mdadm-raid-devices/|Removal of mdadm RAID Devices – How to do it quickly?]]
 ===== Move RAID to a new machine =====
@@ Line 121: / Line 135: @@
   - Append info to mdadm.conf<code>mdadm --detail --scan >> /etc/mdadm/mdadm.conf</code>
   - Update initramfs<code>update-initramfs -u</code>
+  - Copy entire disk to new RAID (add ''-z'' for network transfers)<code>rsync --progress -arHAX <source dir> <destination dir></code>
+  - Check size of directory<code>du -sh</code>
 ==== Troubleshooting ====
@@ Line 130: / Line 146: @@
   * [[https://unix.stackexchange.com/questions/23879/using-mdadm-examine-to-write-mdadm-conf/52935#52935|Using mdadm --examine to write mdadm.conf]]
   * [[https://askubuntu.com/questions/729370/can-i-transfer-my-mdadm-software-raid-to-a-new-system-in-case-of-hardware-failur|Can I transfer my mdadm Software raid to a new system in case of hardware failure?]]
+  * [[https://unix.stackexchange.com/questions/324662/how-to-bring-up-an-inactive-mdadm-raid-after-a-reboot-while-adding-a-drive-to-a|How to bring up an inactive mdadm RAID after a reboot while adding a drive to a raid-6?]]
+  * [[https://support.hpe.com/hpesc/public/docDisplay?docId=c02101717&docLocale=en_US|RedHat Enterprise Linux 5: How to Activate a Software Raid Device Manually]]
+  * [[https://www.diskinternals.com/raid-recovery/how-to-remove-software-raid-with-mdadm/|Remove mdadm RAID Devices – How to do it?]]
 ===== Links =====
   * [[https://raid.wiki.kernel.org/index.php/Resync|Resync]]

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