I was running 4x10TB (XRAID/RAID 5). I replaced two disk with 14TB so that the configuration is 2x10TB and 2x14TB. Resync completed, but volume size is the same as before installing the larger disks at 27TB. I expected 31TB after expansion. Logs indicate that it tried to expand but the only error I see is:
ERROR: sdd sectors < 0 (-22)
after which, it tries to expand again but no errors.
Any ideas?
Thx.
Model: RN424|ReadyNAS 424 – High-performance Business Data Storage - 4-Bay
md127 : active raid5 sde3[5] sda3[4] sdb3[6] sdc3[1] 29284761408 blocks super 1.2 level 5, 64k chunk, algorithm 2 [4/4] [UUUU]
md0 : active raid1 sde1[5] sdb1[6] sda1[4] sdc1[1] 4190208 blocks super 1.2 [4/4] [UUUU]
unused devices: <none> /dev/md/0: Version : 1.2 Creation Time : Thu Apr 19 04:49:57 2018 Raid Level : raid1 Array Size : 4190208 (4.00 GiB 4.29 GB) Used Dev Size : 4190208 (4.00 GiB 4.29 GB) Raid Devices : 4 Total Devices : 4 Persistence : Superblock is persistent
Update Time : Sun Jan 17 16:16:18 2021 State : clean Active Devices : 4 Working Devices : 4 Failed Devices : 0 Spare Devices : 0
Consistency Policy : unknown
Name : 0a440448:0 (local to host 0a440448) UUID : 05b40dd7:f367115f:7dcea494:58ec9efd Events : 1138
Number Major Minor RaidDevice State 6 8 17 0 active sync /dev/sdb1 1 8 33 1 active sync /dev/sdc1 5 8 65 2 active sync /dev/sde1 4 8 1 3 active sync /dev/sda1 /dev/md/Data-0: Version : 1.2 Creation Time : Sat Apr 21 09:39:45 2018 Raid Level : raid5 Array Size : 29284761408 (27928.12 GiB 29987.60 GB) Used Dev Size : 9761587136 (9309.37 GiB 9995.87 GB) Raid Devices : 4 Total Devices : 4 Persistence : Superblock is persistent
Update Time : Sun Jan 17 04:22:13 2021 State : clean Active Devices : 4 Working Devices : 4 Failed Devices : 0 Spare Devices : 0
Layout : left-symmetric Chunk Size : 64K
Consistency Policy : unknown
Name : 0a440448:Data-0 (local to host 0a440448) UUID : 479170a6:4dfb3551:bbcb61e9:c0019d9b Events : 53012
Number Major Minor RaidDevice State 5 8 67 0 active sync /dev/sde3 1 8 35 1 active sync /dev/sdc3 6 8 19 2 active sync /dev/sdb3 4 8 3 3 active sync /dev/sda3
Is XRAID turned on (shows green stripe)? If it's not, you'll get the result you have until you manually expand the volume. But, you should be able to just turn it on and have it expand.
If it's already on, partitions.log may also be helpful.
If you are comfortable with SSH, the following command should start the expansion: volume_util -e xraid. If it doesn't, maybe it will at least give an error message that's helpful.
There are some more specific commands to tell it what drives to use, but I'm afraid that would mess up XRAID knowing the configuration. I've only used them in a FlexRAID unit, and then only for experimentation.
Not especially helpful to me, but seems to indicate that some information on the XRAID configuration that it needs to determine how to expand is missing. Maybe one of the Netgear folks can better interpret it.
The logs indicate that MDADM and the rest of the Linux core are aware of everything, so it must be XRAID that's not, and I don't know where that's located. See if volume_util -s pool will provide more information.
Is the external; drive still disconnected? Maybe it's getting stuck looking for how to expand it, which it can't do, and never moves to the main volume.
The help on volume_util includes:
Usage: volume_util [-c NAME] [-c NAME D1,..,DN] [-c NAME LEVEL D1,..,DN] [-c NAME LEVEL D1,..,DN KEY_FILE] [-d NAME|UUID] [-x NAME|UUID] [-e] [-e TYPE] [-v NAME LEVEL D1,...,DN] [-f NAME DISK] [-S DISK] [-F DISK] [-s TYPE..]
-e Expand pool
TYPE is one of 'auto', 'expand', 'extend', or 'xraid'
auto - automatically do all forms of expansion
expand - expand to fill all space on all current disks (disk replacement)
extend - extend pool to use available new disks (disk addition)
xraid - grow pool to use available space on some current disks
(partial disk replacement)
There is a different command for Flex-RAID expansion and one for "Vdev expand pool", whatever that means, since the only references to Vdev I Google are for ZFS. Then again, ReadyDataOS used ZFS, I believe, so maybe that's just a leftover in the help. It appears clear that OS6 borrowed a lot from ReadyDataOS.
I think playing around with the flex-raid command option is a bad idea at this point, but maybe try volume_util -e expand, though I rather expect a similar error since that's what the xraid expansion type should have determined was needed, if I'm interpreting the command properly. You could try -e auto, too, likely with the same result. It doesn't say what -e by itself does, and it is allowed, so you could try that as well. My guess is it's just shorthand for -e auto and will also give the same result.
The Flex-RAID (-f) option lets you specify devices and the pool (volume), which is what that error message looks like it says it can't find, but I'm afraid it could make things worse if you are not in Flex-RAID mode. Of course, it might work and just not make it better for future expansion. If you want to try it, make sure you have a full backup in case a factory default becomes the only way out of a hole you dug yourself. volume_util --help will give you the options.
Switching XRAID off and back on has been known to fix issues for some, but it is possible that you will be stuck not being able to go back to XRAID, or possibly worse. So, again, be sure you have a backup before you try that.
Data-0 is the label of the RAID, but the BTRFS volume should be on a md RAID device. I've only ever seen anything similar when the OS can't properly mount the file system.
I have no idea how to fix it or if it's even fixable sort of a factory default, as it shouldn't ever be that way. The only thing in /dev/mapper on my NAS is control, which is a character special file one byte long, not a normal file.
Just did a Factor Default using the boot menu. XRaid volume is still coming up as 27TB. Tried Destroying the volume and creating one via the New Volume button, and it's still 27TB under Raid5/XRaid.
Finally got this sorted out. Doing a Factory Default with all four drives in the system resulted in a XRaid volume that was only 27TB, and wouldn't expand. I tried deleting the volume and re-creating it manually using the UI (Destroy, and then New Volume), but that still resulted in a 27TB volume.
This is what worked:
Insert just the two 10TB drives and create a New Volume via UI, this resulted in a 9TB RAID 1 volume.
Once resync completed, I turned on XRaid. Volume is still RAID 1.
Insert first 14TB and let XRaid expand and do it's thing. After Resync, volume is 18TB RAID 5 as expected.
Insert second 14TB and let XRaid expand and do it's thing. After Resync, voume is 31TB RAID 5 as expected.
Whole process took almost 4 days, but seems to be okay. Doing restore from backup now.
