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Remove inactive volumes on EDA500 expansion chassis
I have run an RN516 with three EDA500 expansion chassis for multiple years. Recently, an error where one disk in one of the expansions disconnected and then reconnected (on its own) triggered a resyn...
Hi all
Just to follow up on this one for those interested.
jmaxlow was getting inactive volume error on both EDA-2 and EDA-3. The reason being that neither raid can start.
The raids cannot start because several disks in both EDAs are missing the data partition. EDA disks should have two partitions: 1 for the OS and 1 for the data. These are referenced to as partitions 1 and 3. Several disks are missing the data partition and thus the raids cannot run.=== EDA-2 === 8 176 5860522584 sdl 8 177 4194304 sdl1 8 192 5860522584 sdm 8 193 4194304 sdm1 8 195 5855803936 sdm3 8 208 5860522584 sdn 8 209 4194304 sdn1 8 224 5860522584 sdo 8 225 4194304 sdo1 8 227 5855803936 sdo3 8 240 5860522584 sdp 8 241 4194304 sdp1
=== EDA-3 === 65 0 4883770584 sdq 65 1 4194304 sdq1 65 3 4879051936 sdq3 65 16 4883770584 sdr 65 17 4194304 sdr1 65 32 4883770584 sds 65 33 4194304 sds1 65 35 4879051936 sds3 65 48 4883770584 sdt 65 49 4194304 sdt1 65 64 4883770584 sdu 65 65 4194304 sdu1 65 67 4879051936 sdu3I am a little baffled as to how this happened on so many disks. Perhaps there is a communications issue between the EDAs and the main chassis... Disks appear healthy.
Anyhow, this should be recoverable by copying over the partition table from "working" disks and thus restore the lost partitions. As long as nothing was over-written on those disks we should be good.
I recommended to reach out to NETGEAR and show them this.Cheers
I am working with jmaxlow in the background. We will take a look at each EDA in turn.
I will update thread when we get further. Will take some time due to raid syncing, etc.
Hi all
Just to follow up on this one for those interested.
jmaxlow was getting inactive volume error on both EDA-2 and EDA-3. The reason being that neither raid can start.
The raids cannot start because several disks in both EDAs are missing the data partition. EDA disks should have two partitions: 1 for the OS and 1 for the data. These are referenced to as partitions 1 and 3. Several disks are missing the data partition and thus the raids cannot run.
=== EDA-2 === 8 176 5860522584 sdl 8 177 4194304 sdl1 8 192 5860522584 sdm 8 193 4194304 sdm1 8 195 5855803936 sdm3 8 208 5860522584 sdn 8 209 4194304 sdn1 8 224 5860522584 sdo 8 225 4194304 sdo1 8 227 5855803936 sdo3 8 240 5860522584 sdp 8 241 4194304 sdp1
=== EDA-3 === 65 0 4883770584 sdq 65 1 4194304 sdq1 65 3 4879051936 sdq3 65 16 4883770584 sdr 65 17 4194304 sdr1 65 32 4883770584 sds 65 33 4194304 sds1 65 35 4879051936 sds3 65 48 4883770584 sdt 65 49 4194304 sdt1 65 64 4883770584 sdu 65 65 4194304 sdu1 65 67 4879051936 sdu3
I am a little baffled as to how this happened on so many disks. Perhaps there is a communications issue between the EDAs and the main chassis... Disks appear healthy.
Anyhow, this should be recoverable by copying over the partition table from "working" disks and thus restore the lost partitions. As long as nothing was over-written on those disks we should be good.
I recommended to reach out to NETGEAR and show them this.
Cheers
Definately baffling. On my EDA, the data partition starts where the space for the swap partition (sdx2) ends, though the swap partition is empty. That makes sense. Swap would be very slow if it used the EDA, but reserving it means the volume could be moved into a main NAS chassis and then the swap volume would be added.
Before I had an issue and mounted what was my second EDA by itself, only the first drive in the second EDA had anything actually in the OS partition (sdx1), though it was also present. I wondered why, but did realize that that meant I had 12 that did -- the maximum number of drives in any ReadyNAS at the time.
CFDISK is a good tool to go in and look at the current partitioning and make changes to it. The only thing is that the HELP function crashes (on all of my NASes, so it's generic). But it's pretty interactive and easy to figure out.
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