adding extra disk to ReadyNas 3220

[marcelfj]

We use a readynas for backup

original we used 6 * 4 TB disk (X-raid) (to use 18 TB)

We recently added 5 extra disk (all 4 TB)  because we were running out of diskspace

Automatically the raid 5 changes to raid 6 (Still X-raid) (all disk are ok, synch started en finished)

but there is not any extra diskspace.

Anybody know whats wrong?

Thanks in advance,

Marcel

[StephenB]

OS 6 XRAID automatically switches to dual redundancy (RAID-6) when you add the 6th disk in a rackmount system.  The idea here is that as the disk count grows, you are more likely to suffer from two simultaneous disk failures.  The documentation isn't as clear on this as it might be, though there is a note on page 24 here: http://www.downloads.netgear.com/files/GDC/READYNAS-100/READYNAS_OS_6_SM_EN.pdf

That means the 6th disk adds redundancy, and not space. So XRAID is working as designed.

Unfortunately you can't switch back to RAID-5 at this point.  You'll either need to add another disk (which will expand), or

• switch to flexraid
• destroy your volume
• create a new RAID-5 volume
• reconfigure shares
• restore data from backup.

It's easier to purchase another disk.

[marcelfj]

Thanks, Thats what we thought. But i added 5 extra disks to the unit. Do we have to start anything to enlarge the volume? Marcel

[StephenB]

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@marcelfj wrote:
Thanks, Thats what we thought. But i added 5 extra disks to the unit. Do we have to start anything to enlarge the volume? Marcel

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Oops, I missed that you added five.  Is it still working on the conversion from RAID-5 to RAID-6?  That will take at least 24 hours, possibly longer.

[marcelfj]

Hello StephanB, Is there a way we can see that the unit is still working on it? We placed the disks a week ago now. (But the NAS is still in use for backup-purpose, maybe it is to busy) Thanks Marcel

[StephenB]

The volume screen should tell you if it is syncing.  You can also try using RAIDar and hover your mouse over the volume and disk icons.

[marcelfj]

Hello StephenB,

Synching is done (a few days ago) .

but:

situation now:

11 disk (each 4TB)
nothing changed in the capacity  (totaal 18,2 TB)
it should be ~32 TB

raid is 6 (Xraid)

i found in the logs:

Nov 27 10:29:56 mostnas02 systemd[1]: Started Load/Save Random Seed.
Nov 27 10:29:56 mostnas02 systemd[1]: Starting udev Kernel Device Manager...
Nov 27 10:29:56 mostnas02 systemd[1]: Started udev Kernel Device Manager.
Nov 27 10:29:56 mostnas02 systemd[1]: Starting MD arrays...
Nov 27 10:29:56 mostnas02 systemd[1]: Started Rebuild Hardware Database.
Nov 27 10:29:56 mostnas02 systemd[1]: Started Journal Service.
Nov 27 10:29:56 mostnas02 kernel: md: md127 stopped.
Nov 27 10:29:56 mostnas02 kernel: md: bind<sdi3>
Nov 27 10:29:56 mostnas02 kernel: md: bind<sdg3>
Nov 27 10:29:56 mostnas02 kernel: md: bind<sdf3>
Nov 27 10:29:56 mostnas02 kernel: md: bind<sda3>
Nov 27 10:29:56 mostnas02 kernel: md: bind<sdd3>
Nov 27 10:29:56 mostnas02 kernel: md: bind<sdk3>
Nov 27 10:29:56 mostnas02 kernel: md: bind<sde3>
Nov 27 10:29:56 mostnas02 kernel: md: bind<sdb3>
Nov 27 10:29:56 mostnas02 kernel: md: bind<sdl3>
Nov 27 10:29:56 mostnas02 kernel: md: bind<sdc3>
Nov 27 10:29:56 mostnas02 kernel: md: bind<sdh3>
Nov 27 10:29:56 mostnas02 kernel: md/raid:md127: device sdh3 operational as raid disk 0
Nov 27 10:29:56 mostnas02 kernel: md/raid:md127: device sdc3 operational as raid disk 10
Nov 27 10:29:56 mostnas02 kernel: md/raid:md127: device sdl3 operational as raid disk 9
Nov 27 10:29:56 mostnas02 kernel: md/raid:md127: device sdb3 operational as raid disk 8
Nov 27 10:29:56 mostnas02 kernel: md/raid:md127: device sde3 operational as raid disk 7
Nov 27 10:29:56 mostnas02 kernel: md/raid:md127: device sdk3 operational as raid disk 6
Nov 27 10:29:56 mostnas02 kernel: md/raid:md127: device sdd3 operational as raid disk 5
Nov 27 10:29:56 mostnas02 kernel: md/raid:md127: device sda3 operational as raid disk 4
Nov 27 10:29:56 mostnas02 kernel: md/raid:md127: device sdf3 operational as raid disk 3
Nov 27 10:29:56 mostnas02 kernel: md/raid:md127: device sdg3 operational as raid disk 2
Nov 27 10:29:56 mostnas02 kernel: md/raid:md127: device sdi3 operational as raid disk 1
Nov 27 10:29:56 mostnas02 kernel: md/raid:md127: allocated 11754kB
Nov 27 10:29:56 mostnas02 kernel: md/raid:md127: raid level 6 active with 11 out of 11 devices, algorithm 2
Nov 27 10:29:56 mostnas02 kernel: RAID conf printout:
Nov 27 10:29:56 mostnas02 kernel:  --- level:6 rd:11 wd:11
Nov 27 10:29:56 mostnas02 kernel:  disk 0, o:1, dev:sdh3
Nov 27 10:29:56 mostnas02 kernel:  disk 1, o:1, dev:sdi3
Nov 27 10:29:56 mostnas02 kernel:  disk 2, o:1, dev:sdg3
Nov 27 10:29:56 mostnas02 kernel:  disk 3, o:1, dev:sdf3
Nov 27 10:29:56 mostnas02 kernel:  disk 4, o:1, dev:sda3
Nov 27 10:29:56 mostnas02 kernel:  disk 5, o:1, dev:sdd3
Nov 27 10:29:56 mostnas02 kernel:  disk 6, o:1, dev:sdk3
Nov 27 10:29:56 mostnas02 kernel:  disk 7, o:1, dev:sde3
Nov 27 10:29:56 mostnas02 kernel:  disk 8, o:1, dev:sdb3
Nov 27 10:29:56 mostnas02 kernel:  disk 9, o:1, dev:sdl3
Nov 27 10:29:56 mostnas02 kernel:  disk 10, o:1, dev:sdc3
Nov 27 10:29:56 mostnas02 kernel: md127: detected capacity change from 0 to 35962369081344
Nov 27 10:29:57 mostnas02 kernel: Adding 2877948k swap on /dev/md1.  Priority:-1 extents:1 across:2877948k
Nov 27 10:29:57 mostnas02 kernel: BTRFS: device label 43f60578:data devid 1 transid 544848 /dev/md127
Nov 27 10:29:58 mostnas02 kernel: BTRFS info (device md127): bdev /dev/md127 errs: wr 0, rd 0, flush 0, corrupt 4, gen 0
Nov 27 10:31:21 mostnas02 kernel: BTRFS info (device md127): checking UUID tree

[StephenB]

You might need Netgear's help on this (paid support via my.netgear.com).