Disk in parity slot is not biggest

[drgambit]

Hello,

 

I'm having a problem setting up parity for the first time, and I'm getting the 'Disk in parity slot is not biggest' message... I have searched the forums and I can't seem to find an answer to my problem... 

 

All three drives are 4tb seagate ironwolf NAS drives, and all appear to be the same size:

 

/dev/sdb:
 max sectors   = 7814037168/7814037168, HPA is disabled

/dev/sdc:
 max sectors   = 7814037168/7814037168, HPA is disabled

/dev/sdd:
 max sectors   = 7814037168/7814037168, HPA is disabled

 

I have attached a diagnostic file because I don't know what else is wrong... is there something I'm missing?

nagato-diagnostics-20210503-2142.zip

[Squid]

Set up ST4000VN008-2DR166_ZGY94T2F as the parity.  It's the largest

 

Were these shucked drives?  There may be a hidden partition on the other 2 as they are a hair smaller.

 

Do the drives already contain files?

[drgambit]

8 minutes ago, Squid said:

Set up ST4000VN008-2DR166_ZGY94T2F as the parity.  It's the largest

 

Were these shucked drives?  There may be a hidden partition on the other 2 as they are a hair smaller.

 

Do the drives already contain files?

Argh, yes they do contain files already... I was doing a rolling migration from my older server. They weren't shucked drives...

 

I'm curious, how did you find out that was the larger drive? Is there another file I missed? The smart output looked almost exactly the same...

 

I take it there's a tool I can use that empties a drive for another one?

Edited May 4, 2021 by drgambit

[Squid]

May  3 21:21:40 Nagato kernel: md: import disk0: (sdc) ST4000VN008-2DR166_ZDH8RTH2 size: 3907017540 
May  3 21:21:40 Nagato kernel: md: import_slot: 0 replaced
May  3 21:21:40 Nagato kernel: mdcmd (2): import 1 sdb 64 3907018532 0 ST4000VN008-2DR166_ZGY94T2F
May  3 21:21:40 Nagato kernel: md: import disk1: (sdb) ST4000VN008-2DR166_ZGY94T2F size: 3907018532 
May  3 21:21:40 Nagato kernel: mdcmd (3): import 2 sdd 2048 3907017540 0 ST4000VN008-2DR166_ZDH8DGWH
May  3 21:21:40 Nagato kernel: md: import disk2: (sdd) ST4000VN008-2DR166_ZDH8DGWH size: 3907017540 
May  3 21:21:40 Nagato kernel: mdcmd (4): import 3

 

What you'll have to do then is add that drive into the array, copy all of the files from it to the smaller one(s) and then reassign everything.

[drgambit]

Thanks a lot for your help, I really appreciate it. I'm looking on fdisk and I see that the other two drives are starting at sector 2048 and not 64... I'm going to try to preclear the drive to see if that helps...

[Squid]

1 minute ago, drgambit said:

sector 2048 and not 64

Thanks...  I was actually wondering what the 64 vs 2048 meant in those lines...