× NETGEAR will be terminating ReadyCLOUD service by July 1st, 2023. For more details click here.
Orbi WiFi 7 RBE973
Reply

NV+ with 2TB Drives did not yield expected expansion

KFish
Tutor

NV+ with 2TB Drives did not yield expected expansion

I have an NV+ with 4x1T drives. I added 2 new 2TB drives (one at a time), and the volume build and re-syncs went well. Looking at Front View, it shows the 2 new drives as 1862GB, but shows them both with only 972GB allocated. I am running Radiator 4.1.7, and I have verified in the logs that my factory reset a long time ago worked, and I have 16K (and not 4K) block sizes. After adding the 2 disks I did a reboot, and I expected to have the additional 972GB of space available, for a total of 3.7TB, but the system still thinks I have 2.6TB, which is consistent with those 2 drives having only 972GB allocated.

Anyone got any suggestions?

Ken

PS: Looking around at other posts, I assume the problem here is that I thought I could add 2x2TB drives and get that space. Seems like I have to get to 4x2TB in order to use the extra space, so the good news is that I will have 6TB total, but I have to go out and buy 2 more drives I guess. It would help a lot if someone can validate this. I guess its the difference between X-RAID and X-RAID2, and th NV+ does not support version 2?
Message 1 of 8
mdgm-ntgr
NETGEAR Employee Retired

Re: NV+ with 2TB Drives did not yield expected expansion

Yes, X-RAID uses the capacity of the smallest disk. See X-RAID — RAID for the rest of us.

X-RAID2 (found on x86 ReadyNAS) will expand when redundant space can be added.

What brand and model 2TB drives did you purchase?

What does your partition.log look like?

There is a separate issue, 4k sector partition alignment (not to be confused with the volume block size) which is important if your 2TB drives are 4k sector disks.
Message 2 of 8
KFish
Tutor

Re: NV+ with 2TB Drives did not yield expected expansion

mdgm wrote:
Yes, X-RAID uses the capacity of the smallest disk. See X-RAID — RAID for the rest of us.

X-RAID2 (found on x86 ReadyNAS) will expand when redundant space can be added.

What brand and model 2TB drives did you purchase?

What does your partition.log look like?

There is a separate issue, 4k sector partition alignment (not to be confused with the volume block size) which is important if your 2TB drives are 4k sector disks.


Thanks for the verification. The drives are Western Digital, WD20EARS, which were on the Approved List. The Partition Log looks like what follows. The fist line sounds like its not good:

Disk /dev/hdi doesn't contain a valid partition table

Disk /dev/hdc: 999.9 GB, 999991611392 bytes
255 heads, 63 sectors/track, 121575 cylinders, total 1953108616 sectors
Units = sectors of 1 * 512 = 512 bytes
Disk identifier: 0x00000000

Device Boot Start End Blocks Id System
/dev/hdc1 2 4096001 2048000 83 Linux
Partition 1 does not end on cylinder boundary.
/dev/hdc2 4096002 4608001 256000 82 Linux swap / Solaris
Partition 2 does not end on cylinder boundary.
/dev/hdc3 4608002 1953092233 974242116 5 Extended
/dev/hdc5 4608003 1953092233 974242115+ 8e Linux LVM

Disk /dev/hde: 2000.3 GB, 2000388448256 bytes
255 heads, 63 sectors/track, 243200 cylinders, total 3907008688 sectors
Units = sectors of 1 * 512 = 512 bytes
Disk identifier: 0x00000000

Device Boot Start End Blocks Id System
/dev/hde1 2 4096001 2048000 83 Linux
Partition 1 does not end on cylinder boundary.
/dev/hde2 4096002 4608001 256000 82 Linux swap / Solaris
Partition 2 does not end on cylinder boundary.
/dev/hde3 4608002 1953092233 974242116 5 Extended
/dev/hde5 4608003 1953092233 974242115+ 8e Linux LVM

Disk /dev/hdg: 2000.3 GB, 2000388448256 bytes
255 heads, 63 sectors/track, 243200 cylinders, total 3907008688 sectors
Units = sectors of 1 * 512 = 512 bytes
Disk identifier: 0x00000000

Device Boot Start End Blocks Id System
/dev/hdg1 2 4096001 2048000 83 Linux
Partition 1 does not end on cylinder boundary.
/dev/hdg2 4096002 4608001 256000 82 Linux swap / Solaris
Partition 2 does not end on cylinder boundary.
/dev/hdg3 4608002 1953092233 974242116 5 Extended
/dev/hdg5 4608003 1953092233 974242115+ 8e Linux LVM

Disk /dev/hdi: 999.9 GB, 999991611392 bytes
255 heads, 63 sectors/track, 121575 cylinders, total 1953108616 sectors
Units = sectors of 1 * 512 = 512 bytes
Disk identifier: 0x00000000


Disk /dev/sda: 1000.2 GB, 1000204886016 bytes
255 heads, 63 sectors/track, 121601 cylinders, total 1953525168 sectors
Units = sectors of 1 * 512 = 512 bytes
Disk identifier: 0x41ffc810

Device Boot Start End Blocks Id System
/dev/sda1 * 63 1953520064 976760001 83 Linux
Message 3 of 8
mdgm-ntgr
NETGEAR Employee Retired

Re: NV+ with 2TB Drives did not yield expected expansion

/dev/hdi is the parity disk and so it doesn't have a partition table.

Your disks are not 4k sector aligned and you purchased 4k sector disks, so unfortunately doing a backup and factory reset is recommended. See Why you might want to factory reset a Sparc ReadyNAS

If you don't do the factory reset you may have poor write performance.
Message 4 of 8
KFish
Tutor

Re: NV+ with 2TB Drives did not yield expected expansion

Thanks for the help. I was starting to think it would be a good idea to do the reset/refresh, so looks like I better back the thing up.

This gets harder and harder as the size gets bigger. I am going to have to buy a NAS just to back up my NAS.....

Ken
Message 5 of 8
mdgm-ntgr
NETGEAR Employee Retired

Re: NV+ with 2TB Drives did not yield expected expansion

The NV+ is maxed out using 2TB disks. So if you're going to need to buy a new NAS, I would get a x86 ReadyNAS (e.g. Ultra or Pro) and use that as your new main NAS and the NV+ as a backup NAS. Regular backups of important data primarily stored on your NAS are important and as the amount of data you have grows, doing NAS to NAS backups becomes a good option. I would do NFS for the full backup and Rsync for the incrementals/verifying that full backup was successful. Assuming your NAS is pretty full I would expect backing up your data will take 1-2 days. It took me a couple of days to backup 3.7TB.

6-bay ReadyNAS have a dual-redundancy option which is good. If your budget stretches that far, that's what I'd recommend. There's a current thread on using dual-redundancy here: http://www.readynas.com/forum/viewtopic.php?f=25&t=54763

You will need at least four disks to use dual-redundancy, but you can migrate to use it later on if you wish (instructions are linked to in that thread).
Message 6 of 8
PapaBear1
Guide

Re: NV+ with 2TB Drives did not yield expected expansion

KFish wrote:


This gets harder and harder as the size gets bigger. I am going to have to buy a NAS just to back up my NAS.....

Ken


I came to the same conclusion a little over a year ago and purchased my first NVX which became my primary and my NV+ became the back up NAS. It does well in that role.
Message 7 of 8
KFish
Tutor

Re: NV+ with 2TB Drives did not yield expected expansion

Thanks for both your comments. I mainly use the NAS as a backup device, either for files I have on the various PCs in the house, or for unedited videos that I have on tape, but want to digitize now before the tapes start going. At first blush, it seems insane that I need 2 RAID devices in my house, but I guess if I had planned this better, I would have more than a 4-bay unit. As soon as I get this one set up with 4x2TB, I will start looking for a good deal on a larger device so that I have it up and running before this one gets 90% full like I did this time

Thanks for everyone sharing their experiences and suggestions. 🙂

Ken
Message 8 of 8
Top Contributors
Discussion stats
  • 7 replies
  • 3601 views
  • 0 kudos
  • 3 in conversation
Announcements