mitty@ubuntu-haa:~$ sudo dpkg-reconfigure mdadm
┌──────────────────────────┤ Configuring mdadm ├─
│ │
│ If the kernel supports it (versions greater than 2.6.14), mdadm can │
│ periodically check the redundancy of MD arrays (RAIDs). This may be a │
│ resource-intensive process, depending on the local setup, but it could │
│ help prevent rare cases of data loss. Note that this is a read-only │
│ check unless errors are found; if errors are found, mdadm will try to │
│ correct them, which may result in write access to the media. │
│ │
│ The default, if turned on, is to check on the first Sunday of every │
│ month at 01:06. │
│ │
│ Should mdadm run monthly redundancy checks of the MD arrays? │
│ │
│ [[<Yes>]] <No> │
│ │
└──────────────────────────────────────
(snip)
┌──────────────────────────┤ Configuring mdadm ├─
│ │
│ The MD (RAID) monitor daemon sends email notifications in response to │
│ important MD events (such as a disk failure). │
│ │
│ Enabling this option is recommended. │
│ │
│ Do you want to start the MD monitoring daemon? │
│ │
│ [[<Yes>]] <No> │
│ │
└──────────────────────────────────────
(snip)
┌─────────────────────────┤ Configuring mdadm ├──
│ Please enter the email address of the user who should get the email │
│ notifications for important MD events. │
│ │
│ Recipient for email notifications: │
│ │
│ root_________________________________________________________________ │
│ │
│ <Ok> │
│ │
└───────────────────────────────────────
(snip)
┌───────────────────────────┤ Configuring mdadm ├
│ │
│ If your root filesystem is on a RAID, and a disk is missing at boot, it │
│ can either boot with the degraded array, or hold the system at a │
│ recovery shell. │
│ │
│ Running a system with a degraded RAID could result in permanent data │
│ loss if it suffers another hardware fault. │
│ │
│ If you do not have access to the server console to use the recovery │
│ shell, you might answer "yes" to enable the system to boot unattended. │
│ │
│ Do you want to boot your system if your RAID becomes degraded? │
│ │
│ [[<Yes>]] <No> │
│ │
└───────────────────────────────────────
