Mdadm - Revision history

ViciousCarnivore at 17:09, 27 June 2025

2025-06-27T17:09:26Z

2023-04-16T05:50:15Z

2020-05-05T02:27:44Z

2020-05-05T02:27:15Z

Add Drive to Array

2020-05-05T02:26:38Z

Email Notifications

2020-05-05T02:25:11Z

Email Notifications

2020-05-05T02:22:08Z

2020-05-05T02:21:51Z

2020-05-05T02:20:58Z

Usage

2020-05-05T02:19:46Z

@@ Line 159: / Line 159: @@
 Configuring Email w/ssmtp:
 https://wiki.zoneminder.com/SMS_Notifications
 {{GNU\Linux}}

← Older revision		Revision as of 05:50, 16 April 2023
Line 1:		Line 1:
−	There are a few options for software RAID on Gnu Linux. Among them is BtrFS and ZFS (the latter of which has licensing issues, so use discretion before using)., however today I will focus on mdadm. This is historically the oldest software raid, therefore should be better vetted, although its performance may be less of that of the first two mentioned - for simple servers, mdadm might be the most stable choice.	+	There are a few options for software RAID on Gnu Linux. Among them is BtrFS and ZFS (the latter of which has licensing issues, so use discretion before using)., however today I will focus on mdadm. This is historically the oldest software raid, therefore should be better vetted, although its performance may be less of that of the first two mentioned - for simple servers, mdadm might be the most stable choice. However, after testing it in practice I found that it was not stable on 1 out of 2 machines. The general rule that 'software RAID is not trustworthy' might apply here. Generally, go with hardware RAID.

	==Creation of RAID==		==Creation of RAID==

← Older revision		Revision as of 02:27, 5 May 2020
Line 159:		Line 159:
	Configuring Email w/ssmtp:		Configuring Email w/ssmtp:
	https://wiki.zoneminder.com/SMS_Notifications		https://wiki.zoneminder.com/SMS_Notifications
		+
		+	{{GNU\Linux}}

@@ Line 42: / Line 42: @@
   # mdadm --add /dev/md127 /dev/sda1
-NOTE: If you setup 2 hdds, in a raid, and want to add a third, if you just --add, it will show up as a spare...
+<small>NOTE: If you setup 2 hdds, in a raid, and want to add a third, if you just --add, it will show up as a spare...
 if you do mdadm --grow /dev/md127 -raid-devices=3 then the third might be active sync (what we want)
@@ Line 51: / Line 51: @@
 NOTE: if you have a new drive and need to copy the hdd partition tables:
 https://unix.stackexchange.com/questions/12986/how-to-copy-the-partition-layout-of-a-whole-disk-using-standard-tools
-or aka
+or aka</small>
 <pre>
 (FOR MBR ONLY)

@@ Line 134: / Line 134: @@
 Test emails on mdadm.. first configure email however you prefer (i currently use ssmtp).
-edit /etc/mdadm/mdadm.conf to have your email in mailadd
+edit /etc/mdadm/mdadm.conf; put the email recipient in mailadd variable
 then
 <pre>
-sudo mdadm --monitor --scan --test --oneshot
+# mdadm --monitor --scan --test --oneshot
 </pre>
 should send an email

← Older revision		Revision as of 02:25, 5 May 2020
Line 141:		Line 141:
	</pre>		</pre>
	should send an email		should send an email
		+
		+	<small>(Be careful that updates don't break this file. I see it's generated by mkconf.)</small>

← Older revision		Revision as of 02:22, 5 May 2020
Line 1:		Line 1:
−	There are a few options for software RAID on Gnu Linux. Among them is BtrFS and ZFS (the latter of which has licensing issues, so use discretion before using)., however today I will focus on mdadm. This is historically the oldest software raid, therefore should be better vetted, although its performance may be less of that of the first two mentioned - for simple servers, mdadm might be the stable choice.	+	There are a few options for software RAID on Gnu Linux. Among them is BtrFS and ZFS (the latter of which has licensing issues, so use discretion before using)., however today I will focus on mdadm. This is historically the oldest software raid, therefore should be better vetted, although its performance may be less of that of the first two mentioned - for simple servers, mdadm might be the most stable choice.

	==Creation of RAID==		==Creation of RAID==

← Older revision		Revision as of 02:21, 5 May 2020
Line 1:		Line 1:
−	There are a few options for software RAID on Gnu Linux. Among them is BtrFS and ZFS (the latter of which has licensing issues, so use discretion before using)., however today I will focus on mdadm. This is historically the oldest software raid, therefore should be better vetted, although its performance may be less of that of the first two mentioned - for simple servers, mdadm might be the ~~most~~ stable choice.	+	There are a few options for software RAID on Gnu Linux. Among them is BtrFS and ZFS (the latter of which has licensing issues, so use discretion before using)., however today I will focus on mdadm. This is historically the oldest software raid, therefore should be better vetted, although its performance may be less of that of the first two mentioned - for simple servers, mdadm might be the stable choice.

	==Creation of RAID==		==Creation of RAID==

@@ Line 6: / Line 6: @@
 ==Usage==
-===Status / Details of Raid===
+===Status / Details===
   # sudo mdadm -D /dev/md127
 <pre>
@@ Line 38: / Line 38: @@
-===Add Drive to RAID===
+===Add Drive to Array===
   # mdadm --add /dev/md127 /dev/sda1
@@ Line 130: / Line 131: @@
 '''WARNING:''' Reinstall grub on the new drive again as well afterwards.
-===Email Notifications on mdadm===
+===Email Notifications===
 Test emails on mdadm.. first configure email however you prefer (i currently use ssmtp).