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RN 516 - Remove inactive volumes to use the disk #4 – ghost volume
My device is running latest firmware 6.8.1 and has one raid 5 set of 6x6tb disk as data. Now the volume page shows disk 4 as a additional raid5 named data-1. On the message line appears “Remove inact...
Yes, SDD (drive 4) is not a part ot MD126 (the second layer in your volume). Either the expansion did not go as it should when you added drive 4, or the NAS has "lost" that partition. But now it looks like it has found the lost partition and declared it to be a separate incomplete volume.
You may want to wait for mdgm-ntgr or one of the other Netgear mods to concur, but it looks to me like that's exactly why they changed the OS to be more aggressive in looking for lost volumes and that deleting it will do the trick. Whether it will then re-sync and add the lost space into the volume is another thing. You may need to remove the drive, delete the partitions, and let it start from there. But that would be far less work that a factory default and restore.
here is the output of lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
sda 8:0 0 5.5T 0 disk
├─sda1 8:1 0 4G 0 part
│ └─md0 9:0 0 4G 0 raid1 /
├─sda2 8:2 0 512M 0 part
│ └─md1 9:1 0 2G 0 raid6 [SWAP]
├─sda3 8:3 0 3.6T 0 part
│ └─md127 9:127 0 18.2T 0 raid5 /data
└─sda4 8:4 0 1.8T 0 part
└─md126 9:126 0 7.3T 0 raid5
sdb 8:16 0 5.5T 0 disk
├─sdb1 8:17 0 4G 0 part
│ └─md0 9:0 0 4G 0 raid1 /
├─sdb2 8:18 0 512M 0 part
│ └─md1 9:1 0 2G 0 raid6 [SWAP]
├─sdb3 8:19 0 3.6T 0 part
│ └─md127 9:127 0 18.2T 0 raid5 /data
└─sdb4 8:20 0 1.8T 0 part
└─md126 9:126 0 7.3T 0 raid5
sdc 8:32 0 5.5T 0 disk
├─sdc1 8:33 0 4G 0 part
│ └─md0 9:0 0 4G 0 raid1 /
├─sdc2 8:34 0 512M 0 part
│ └─md1 9:1 0 2G 0 raid6 [SWAP]
├─sdc3 8:35 0 3.6T 0 part
│ └─md127 9:127 0 18.2T 0 raid5 /data
└─sdc4 8:36 0 1.8T 0 part
└─md126 9:126 0 7.3T 0 raid5
sdd 8:48 0 5.5T 0 disk
├─sdd1 8:49 0 4G 0 part
│ └─md0 9:0 0 4G 0 raid1 /
├─sdd2 8:50 0 512M 0 part
│ └─md1 9:1 0 2G 0 raid6 [SWAP]
├─sdd3 8:51 0 3.6T 0 part
│ └─md127 9:127 0 18.2T 0 raid5 /data
└─sdd4 8:52 0 1.8T 0 part
sde 8:64 0 5.5T 0 disk
├─sde1 8:65 0 4G 0 part
│ └─md0 9:0 0 4G 0 raid1 /
├─sde2 8:66 0 512M 0 part
│ └─md1 9:1 0 2G 0 raid6 [SWAP]
├─sde3 8:67 0 3.6T 0 part
│ └─md127 9:127 0 18.2T 0 raid5 /data
└─sde4 8:68 0 1.8T 0 part
└─md126 9:126 0 7.3T 0 raid5
sdf 8:80 0 5.5T 0 disk
├─sdf1 8:81 0 4G 0 part
│ └─md0 9:0 0 4G 0 raid1 /
├─sdf2 8:82 0 512M 0 part
│ └─md1 9:1 0 2G 0 raid6 [SWAP]
├─sdf3 8:83 0 3.6T 0 part
│ └─md127 9:127 0 18.2T 0 raid5 /data
└─sdf4 8:84 0 1.8T 0 part
└─md126 9:126 0 7.3T 0 raid5
Yes, SDD (drive 4) is not a part ot MD126 (the second layer in your volume). Either the expansion did not go as it should when you added drive 4, or the NAS has "lost" that partition. But now it looks like it has found the lost partition and declared it to be a separate incomplete volume.
You may want to wait for mdgm-ntgr or one of the other Netgear mods to concur, but it looks to me like that's exactly why they changed the OS to be more aggressive in looking for lost volumes and that deleting it will do the trick. Whether it will then re-sync and add the lost space into the volume is another thing. You may need to remove the drive, delete the partitions, and let it start from there. But that would be far less work that a factory default and restore.
The backup and the resynch took a while. I pulled of the drive and deleted all volumes and inserted it again. The phantom volumen is gone and now I have around 2 TB more free space. Thanks for your assistance.
I'm glad it worked out.
I just want to caution others who may come searching for an answer to what looks like a similar problem that theirs might be different. This is not always the right action. If you cannot decypher the lsblk report, let somebody here take a look for you. Some months ago, another user deleted the wrong volume and lost everything.
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