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Re: missing available disk space - after drive upgrade

kevinfor1
Aspirant

missing available disk space - after drive upgrade

This doesn't seem right... our NAS currently has the following drives
6TB+4TB+4TB+4TB+3TB+2TB = 23TB OS 6.2.1 RN716X RAID-5 with X-RAID2

but the available storage is only 14TB - so we are missing about 8TB - that seems excessive... (usually your "available space" is determined by adding the storage of all drives in the NAS .. then subtract one drive.

it is possible when we first got this NAS... we set it up with maybe 2 1TB Drives (4 bays Free) copied some data onto it ... then slowly added drives ... one at a time ... to expand it to where we are today

I thought with BtrfS & the next NAS generation NAS Series (RN716X) there were NO Upgrade limitations ... meaning you could go from a NAS with 2 1TB drives... then slowly add 6TB drives one at a time until it was filled with 6TB Drives.. (up to the 24TB Limit). and that would be the exact same as starting out with a brand new NAS with 6x 6TB and no "Factory Reset" - How much "available disk space" should we be seeing with the configuration above? We eventually plan to replace the 2TB & 3TB with either 6TB (or 8/10TB Drives once they are on the approved list)
Message 1 of 10
StephenB
Guru

Re: missing available disk space - after drive upgrade

The array should be about 17 TB (or 15.4 TiB, which is what web ui displays).

What size are you seeing on the volume page of the web ui?
Message 2 of 10
kevinfor1
Aspirant

Re: missing available disk space - after drive upgrade

Data 12.82TB - Free 1.71TB or (1.71TB Free of 14.53TB)
Message 3 of 10
vandermerwe
Master

Re: missing available disk space - after drive upgrade

See this:
http://ram.kossboss.com/xraid/

The nas needs to create redundant space, it can't use a small drive to create redundant space for a raid array that is using bigger drives. Effectively you have a raid 5 array of 6x2tb, a raid 5 array of 5x1tb, and a raid 5 array of 4x1tb. The remaining 2 tb of the 6 tb disk is not being used as the nas cannot create redundant space.
Message 4 of 10
StephenB
Guru

Re: missing available disk space - after drive upgrade

vandermerwe wrote:
See this:
http://ram.kossboss.com/xraid/

The nas needs to create redundant space, it can't use a small drive to create redundant space for a raid array that is using bigger drives. Effectively you have a raid 5 array of 6x2tb, a raid 5 array of 5x1tb, a raid 5 array of 4x1tb, and a raid 1 array of 2x1tb. The remaining 2 tb of the 6 tb disk is not being used as the nas cannot create redundant space.
Well, no. Your analysis isn't quite correct.

With 6TB+4TB+4TB+4TB+3TB+2TB the layering is 6x2TB, 5x1TB and 4x1TB. There is no RAID-1 component. 2 TB is not being used on the 6 TB drive. This results in a 17 TB (or ~15.4 TiB) volume size.

But the OP is expecting that size, and is seeing about 1 TB less. That is why he's posting.

BTW, if he started with 2x1TB, then the layering would be 6x1TB, 6x1TB, 5x1TB and 4x1TB. Once created, the layers remain.
Message 5 of 10
vandermerwe
Master

Re: missing available disk space - after drive upgrade

Ah yes, not sure why I stuck in the extra raid 1 array. Silly me.
Message 6 of 10
StephenB
Guru

Re: missing available disk space - after drive upgrade

Easy mistake to make...

kevinfor - can you double check the the drive sizes of the smaller drives? If any one of them is 1 TB smaller than you think, then that would explain it.
Message 7 of 10
vandermerwe
Master

Re: missing available disk space - after drive upgrade

Also kevinfor, what make and model disks are you using?
What does each disk display as its capacity when you look in System/Volume/Settings?
Message 8 of 10
kevinfor1
Aspirant

Re: missing available disk space - after drive upgrade

setup #1
RN716X - Here are the current drives

#1 2TB ST32000644NS
#2 3TB Hitachi HDS723030ALA640
#3 6TB WDC WD60EFRX-68MYMNO
#4 4TB ST4000VN000-1H4168 (JUST DIED TODAY)
#5 4TB ST4000VN000-1H4168
#6 4TB ST4000VN000-1H4168

Drive #4 just Died today.... I am thinking of ordering 3 of the 6TB WD60EFRX - Replace the bad drive first... let it resync/rebuild etc ... then slowly replace the 2TB & 3TB (move them to the other Pro Nas) with 6TB so it would look like

setup #2
it would look like
#1 6TB WD60EFRX
#2 6TB WD60EFRX
#3 6TB WD60EFRX
#4 6TB WD60EFRX
#5 4TB ST4000VN000
#6 4TB ST4000VN000

I guess this runs into the 24TB limit

- I don't remember what this RN716X NAS Actually started with... (it could have started with just 2 x 250GB Drives etc) from an NV+ - then as we were able to pull data off the 2 older NAS devices and move everything over the 716.... slowly replacing or add with 500GB drives or 750GB then replacing them ... until it looked like setup #1 above

Sounds like what I need to do at this point is: get the RN716X to match the setup#2 above.... move the 2TB & 3TB over to the older Business Pro... replacing it's 1TB drives.. then factory reset that box (it has no data) move those 1TB drives over to the NV+ Factory reset it.. then Rsync (or if the Pro is not large enough by itself ) manually data backup backup 716 over to the Pro / NV+ - so 716 is empty ... then Factory Reset it.... move the data to the 716 - sell the NV+ and eventually use the Pro as a backup of the 716 - then call Seagate & see if they will replace the defective 4TB Drive (probably take 1HR+ on the phone with Seagate support & 2+ Weeks Shipping) then throw that new 4TB into the Pro replacing one of the 1.5TB drives.. WOW... Lots of Work 😄

is there any way to view the actual layers that exist on the NAS Currently?

Mon Dec 22 2014 16:59:12 Disk: Disk in channel '4' (Internal) changed state from ONLINE to FAILED.
Mon Dec 22 2014 16:53:36 Volume: The rebuild operation has finished on volume 'data'. However, the volume is still degraded.
Mon Dec 22 2014 12:17:36 Volume: Volume 'data' is 'Degraded'.
Mon Dec 22 2014 12:17:01 Volume: Rebuilding started for Volume 'data'.
Mon Dec 22 2014 12:16:05 System: ReadyNASOS background service started.
Mon Dec 22 2014 12:16:04 Volume: Volume 'data' usage exceeds 80 % of size (14.5 TB).
Mon Dec 22 2014 12:16:03 System: ReadyNASOS service or process was restarted.
Sun Dec 21 2014 11:33:40 Disk: Detected increasing pending sector count: [14704] on disk 4 (Internal) [ST4000VN000-1H4168, Z300VBCR] 238 times in the past 30 days. This condition often indicates an impending failure. Please be prepared to replace this disk to maintain data redundancy.
Message 9 of 10
StephenB
Guru

Re: missing available disk space - after drive upgrade

kevinfor wrote:

setup #2
it would look like
#1 6TB WD60EFRX
#2 6TB WD60EFRX
#3 6TB WD60EFRX
#4 6TB WD60EFRX
#5 4TB ST4000VN000
#6 4TB ST4000VN000

I guess this runs into the 24TB limit.
Not a problem though. The 24 TB limit was based on available drives when the 716 was released. Netgear is in process of updating the various specs to say 36 TB. For instance http://www.downloads.netgear.com/files/ ... -RN700.pdf. So this will work, and give you 26 TB of storage with single redundancy, and 20 TB with dual redundancy. There is no need to do a factory reset on the 716 (though the missing space in your existing volume is still unexplained).

kevinfor wrote:
Sounds like what I need to do at this point is: get the RN716X to match the setup#2 above.... move the 2TB & 3TB over to the older Business Pro... replacing it's 1TB drives.. then factory reset that box (it has no data) move those 1TB drives over to the NV+ Factory reset it.. then Rsync (or if the Pro is not large enough by itself ) manually data backup backup 716 over to the Pro / NV+ - so 716 is empty ... then Factory Reset it.... move the data to the 716
Of course you should back up your 716x anyway. This procedure will work (though I don't think you absolutely need to reset the 716). You might not need to reset the pro, that depends on its starting point. There's a 16 TB ceiling on the volume size, and an 8 TB growth limit from the starting point. It is possible to run OS6 on the pro, though that is unsupported.

kevinfor wrote:
then call Seagate & see if they will replace the defective 4TB Drive (probably take 1HR+ on the phone with Seagate support & 2+ Weeks Shipping) then throw that new 4TB into the Pro replacing one of the 1.5TB drives..
Where are you based? In the US you can do an "advance replacement". Seagate will ship you a new drive (2 day shipping I think), and then you ship the old one back. Its best to test the drive with Seatools if you can, and tell them the failure code when you set up the RMA. Though there are codes you can use if you aren't able to do that - http://www.seagate.com/staticfiles/supp ... codes.html

kevinfor wrote:
is there any way to view the actual layers that exist on the NAS Currently?
You can see them with ssh. I believe you can also see them in volume.log (though my OS6 systems are jbod, so I am not 100% certain).

kevinfor wrote:
Sun Dec 21 2014 11:33:40 Disk: Detected increasing pending sector count: [14704] on disk 4 (Internal) [ST4000VN000-1H4168, Z300VBCR] 238 times in the past 30 days. This condition often indicates an impending failure. Please be prepared to replace this disk to maintain data redundancy.
Definitely failed.
Message 10 of 10
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