Help! You do the math. I had an 11x8TB array, which gave me 65.46TB capacity. I added one final 8TB disk to increase capacity. I spent a few days expanding and came back to no increase in size. I should be around 72.8TB.

[PrescottX]

https://www.reddit.com/r/synology/comments/els62r/help_you_do_the_math_i_had_an_11x8tb_array_which/

 

See my post above.  Does anyone here have any suggestions?

 

A few more notes.

-My original array was a Raid5 with 10 x 7.28TB

-My new array is Raid6 with 12 x 7.28TB

-I added two 8TB drives and converted to a Raid 6. The system log stated I successfully changed to Raid 6 with my new drives. But I seem to have lost 7.28TB of space. My raid should have gone from 65.46 to 72.8.

-This is only only raid group.

-I only have 1 volume.

- These are 8TB drives, 7.28 is the raw capacity after partition.

-Im data scrubbing currently manually to see if that makes a difference.

-I have rebooted.

[jensmander]

First: please keep your thread titles short and don‘t write half of the new testament in it.

 

Second: you added drives to the RAID group. You’ll have to expand your volume after parity checks have completed.

 

Official howto:

 

https://www.synology.com/en-global/knowledgebase/DSM/help/DSM/StorageManager/volume_expand_volume

[PrescottX]

First: Understood.

 

Second:  The first parity check already completed.  There was no option to to expand the volume.  The capacity didn't increase.  This is the second parity check I am attempting in the picture.  I followed those instruction after reboot and the action was no available.

[jensmander]

So in "Volume" -> "Volume1" -> "Action" -> "Configure" there's no option to increase the size? The current allocated size should be smaller than the max. alloctable size.

[bearcat]

14 hours ago, PrescottX said:

 

-My original array was a Raid5 with 10 x 7.28TB

-My new array is Raid6 with 12 x 7.28TB

 

I did some math

 

10*8TB in RAID5 = 56TB storage + 8TB protection 

10*8TB in RAID6 = 48TB storage + 16TB protection 

12*8TB in RAID5 = 72TB storage + 8TB protection

12*8TB in RAID6 = 64TB storage + 16TB protection

 

Does this add up?

[IG-88]

7 hours ago, bearcat said:

I did some math

 

 try again and use some calculating aid?

 

12 x 8 = 10 x 8 + 2 x 8 = 80 + 16

 

irl its 7.28 TB per disk so it should be 10 x 7.28 = 72.8 usable space (without filesystem)

(we just ignore the 4.4GB missing from every disk for system and swap)

 

22 hours ago, PrescottX said:

See my post above.  Does anyone here have any suggestions?

 

check the status of the raid from the commandline

https://raid.wiki.kernel.org/index.php/Mdstat

https://raid.wiki.kernel.org/index.php/Detecting,_querying_and_testing

 

edit: on my last raid extension the additional space only showed up after completely finishing the process, as it was running it showed already the added disk but not the added space, so the process might still running or did not finish successfully

Edited January 9, 2020 by IG-88

[bearcat]

@IG-88 <insert facepalm as needed>

Actually, I did use a calculator but I missed to "insert" a few drives the first run, starting out with 8, and ending with 10 

I guess I can blame it on either the eyesurgery I had before X-mas, or growing to old and confused 

 

@PrescottX Sorry for the confusion

[IG-88]

4 hours ago, bearcat said:

@IG-88 <insert facepalm as needed>

 

ok, i choose this one

https://tenor.com/view/face-palm-picard-ffs-stng-facepalm-picard-face-palm-gif-13502964