i upgraded an old nas device from debian 8 to 9 and started get'n this message
what's the dang deal :)
i don't have any spares
root@nsa320:~# mdadm -D /dev/md4
/dev/md4:
Version : 0.90
Creation Time : Tue Mar 5 13:16:13 2013
Raid Level : raid1
Array Size : 1932713920 (1843.18 GiB 1979.10 GB)
Used Dev Size : 1932713920 (1843.18 GiB 1979.10 GB)
Raid Devices : 2
Total Devices : 2
Preferred Minor : 4
Persistence : Superblock is persistent
Update Time : Thu Jul 9 06:13:34 2020
State : clean
Active Devices : 2
Working Devices : 2
Failed Devices : 0
Spare Devices : 0
UUID : dc6cc046:ef4012cc:ecea512d:0eb28517 (local to host nsa320)
Events : 0.99097
Number Major Minor RaidDevice State
0 8 20 0 active sync /dev/sdb4
1 8 4 1 active sync /dev/sda4
---------- Forwarded message ----------
Date: Wed, 8 Jul 2020 18:20:14 -0500
From: mdadm monitoring <root@localhost.localdomain>
To: root@nsa320.grumpy-net
Subject: SparesMissing event on /dev/md4:nsa320
This is an automatically generated mail message from mdadm
running on nsa320
A SparesMissing event had been detected on md device /dev/md4.
Faithfully yours, etc.
P.S. The /proc/mdstat file currently contains the following:
Personalities : [linear] [raid0] [raid1] [raid10] [raid6] [raid5] [raid4] [multipath]
md2 : active raid1 sda2[1] sdb2[0]
19573696 blocks [2/2] [UU]
md4 : active raid1 sda4[1] sdb4[0]
1932713920 blocks [2/2] [UU]
md3 : active raid1 sda3[1] sdb3[0]
975808 blocks [2/2] [UU]
unused devices: <none>
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