Hi Matas,

I just tried this in the lab (to be honest, I've never run this command) and encountered no issues. I had 3 FS, each containing a single SDS and a volume spread across the whole Storage Pool - I cleared all 3 FS, one by one while reading the volume on the SDC side with 'dd' - I saw no IO errors, no rebuilds etc. so I would assume it should work fine.

Query all returned 1 Protection Domain:

Protection Domain pd1 (Id: df60d22700000000) has 1 storage pools, 3 Fault Sets, 3 SDS nodes, 1 volumes and 88.0 GB (90112 MB) available for volume allocation

Operational state is Active

(…)

Volumes summary:        

1 thick-provisioned volume. Total size: 904.0 GB (925696 MB)

# scli --query_all_fault_sets --protection_domain_name pd1

Protection Domain has 3 Fault Sets:

Protection Domain ID: df60d22700000000 Fault Set: ID: 0be456ef00000000 Name: FS1 SDS Count: 1 

SDS ID: 690bffe500000000 Name: N/A

Protection Domain ID: df60d22700000000 Fault Set: ID: 0be456f000000001 Name: FS2 SDS Count: 1 

SDS ID: 690bffe600000001 Name: N/A

Protection Domain ID: df60d22700000000 Fault Set: ID: 0be456f100000002 Name: FS3 SDS Count: 1  

SDS ID: 690bffe700000002 Name: N/A

# scli --clear_fault_set --protection_domain_name pd1 --fault_set_name FS1

Clearing a Fault Set will permanently disable it. Press 'y' and then Enter to confirm: y

Successfully cleared Fault Set

# scli --clear_fault_set --protection_domain_name pd1 --fault_set_name FS2

Clearing a Fault Set will permanently disable it. Press 'y' and then Enter to confirm: y

Successfully cleared Fault Set ScaleIO-10-136-243-112:~

# scli --clear_fault_set --protection_domain_name pd1 --fault_set_name FS3

Clearing a Fault Set will permanently disable it. Press 'y' and then Enter to confirm: y

Successfully cleared Fault Set

# scli --query_all_fault_sets --protection_domain_name pd1

Protection Domain has 3 Fault Sets:

Protection Domain ID: df60d22700000000 Fault Set: ID: 0be456ef00000000 Name: FS1 SDS Count: 0

Protection Domain ID: df60d22700000000 Fault Set: ID: 0be456f000000001 Name: FS2 SDS Count: 0

Protection Domain ID: df60d22700000000 Fault Set: ID: 0be456f100000002 Name: FS3 SDS Count: 0

While on the SDC I was running:

# dd if=/dev/scinib of=/dev/null  bs=1M

No errors reported.

If you like, I can try to reach out to developers to fully understand what 'scli --clear_fault_set' does, but there is a good chance it won't do any harm - given your system is healthy and configured properly.

Cheers,

Pawel

Hi, Pawel, did you get answer from devs , what that command really means ?

Thanks,

Matas