topic Re: Snapshot Deletion - Ignore Owners in General Discussion

Snapshot Deletion - Ignore Owners

MohamedShehata — Wed, 04 Jun 2025 10:49:54 GMT

hello all,

when deleting a snapshot in CDOT we can use the variable [-ignore-owners], how can i use that in 7mode version [NetApp Release 8.2.3P6 7-Mode] ?

Re: Snapshot Deletion - Ignore Owners

tahmad — Wed, 14 Oct 2020 04:10:38 GMT

Hi,

What error message you are getting when you try to delete?

Also, you may follow the inductions listed in the below document:

Deleting busy Snapshot copies

Re: Snapshot Deletion - Ignore Owners

MohamedShehata — Wed, 14 Oct 2020 07:21:17 GMT

i did actually follow this document because my snapshots are in busy state, but the issue is when i try to run the command [lun snap usage [-s] vol_name snap_name ] i get LUNs that are locking the deletion, when i try to destroy the LUN the systems shows that LUN doesn't exists, thats why i am asking if there is a way to ignore the snapshot owner in 7mode or maybe delete those LUNs somehow ?

Re: Snapshot Deletion - Ignore Owners

darb0505 — Thu, 15 Oct 2020 04:46:51 GMT

Hi Mohamed Shehata,

When you compare the lun snap usage to the lun show output do you see the lun that you are trying to delete in "lun show"? The lun may already be deleted and you need to just delete the snapshot. Here is some additional information on deleting backing snapshot copies when a lun is deleted.

You can also reference KB: How to delete snapshots in the (busy,LUN) state

It sounds like there are some additional snapshots that might first need to be deleted before you can delete the original snapshot that is showing (busy, LUN). Let us know if turning on the snapshot_clone_dependency helps clear up the busy,LUN snapshot so it can be deleted.

Thanks

Re: Snapshot Deletion - Ignore Owners

MohamedShehata — Thu, 15 Oct 2020 07:45:49 GMT

Hi darb0505,

I cannot see the lun when I use the command [lun show] and when I show the specific lun the output is [lun doesn't exists], I have deleted all the snapshots related to that volume except for the busy ones which cannot be deleted (the issue I am trying to solve) and I cannot find the option [snapshot_clone_dependency] on the system -> in advanced and regular mode I used the command [options] to view them all of them but I cannot find it.

Thanks...

Re: Snapshot Deletion - Ignore Owners

darb0505 — Thu, 15 Oct 2020 09:20:30 GMT

Hi MohamedShehata,

Are you looking for the snapshot_clone_dependency in the options list for the ONTAP system?

Example:

fas01> options snap snaplock.autocommit_period none snaplock.compliance.write_verify off snaplock.log.default_retention 6m snaplock.log.maximum_size 10m snapmirror.access legacy snapmirror.checkip.enable off snapmirror.cmode.suspend off snapmirror.delayed_acks.enable on snapmirror.enable off snapmirror.log.enable on snapmirror.vbn_log_enable off snapmirror.volume.local_nwk_bypass.enable on snapmirror.vsm.volread.smtape_enable on

If you are looking at the options you will not see the snapshot_clone_dependency option there. This is an option in the vol options. See below:

fas01> vol options vol options: No volume name supplied. usage: vol options <vol-name> <option-name> <option-val> The following commands are available; for more information type "vol help options <command>" acdirmax flexcache_autogrow nosnap snaplock_default_period acdisconnected flexcache_min_reserve nosnapdir snaplock_maximum_period acregmax fractional_reserve nvfail snaplock_minimum_period acsymmax fs_size_fixed raidsize snapmirrored actimeo guarantee raidtype snapshot_clone_dependency convert_ucode maxdirsize read_realloc svo_allow_rman create_ucode minra resyncsnaptime svo_checksum disconnected_mode nbu_archival_snap root svo_enable dlog_hole_reserve no_atime_update schedsnapname svo_reject_errors extent no_i2p snaplock_autocommit_period try_first

What you want to do is run the following command: vol options <vol-name> snapshot_clone_dependency <on | off>

This is off by default so you will want to set it to on for the volume in question. Once it is on you should be able to go in and delete the snapshot in question.

Let me know if you have any issues.

Thanks

Re: Snapshot Deletion - Ignore Owners

MohamedShehata — Thu, 15 Oct 2020 10:52:51 GMT

Hello darb0505,

I found the option is set to [on] so I made it [off] but still have the same issue, there is a lun locking the snapshot deletion which I can view by the command [lun snap usage] but I can't find or destroy that lun

Thanks

Re: Snapshot Deletion - Ignore Owners

MohamedShehata — Thu, 15 Oct 2020 11:58:33 GMT

i need to add that all the LUNs which are locking the snapshot deletion got in their name [.rws], is there like a directory in the storage i can manually delete these LUNs from ?

Re: Snapshot Deletion - Ignore Owners

Ontapforrum — Thu, 15 Oct 2020 12:46:59 GMT

Check this kb:

https://kb.netapp.com/Advice_and_Troubleshooting/Data_Storage_Software/ONTAP_OS/Unable_to_delete_Snapshots%2C_it_shows_%22busy%2C_vclone_state%22

If you have already followed it, then could you share the 'snap list' and 'vol status -v' output from your filer ? If you cannot share the details, you may try raising a ticket, engineer might help you resolve this via remote session.

Re: Snapshot Deletion - Ignore Owners

MohamedShehata — Fri, 16 Oct 2020 09:04:39 GMT

hello,

i've reviewed the document but also i can't find a solution, let me share the commands you asked for:

FilerName> vol status -v VolName
Volume State Status Options
VolName online raid_dp, flex nosnap=off, nosnapdir=off, minra=off,
64-bit no_atime_update=off, nvfail=off,
ignore_inconsistent=off, snapmirrored=off,
create_ucode=on, convert_ucode=on,
maxdirsize=73400, schedsnapname=create_time,
fs_size_fixed=off, guarantee=none,
svo_enable=off, svo_checksum=off,
svo_allow_rman=off, svo_reject_errors=off,
no_i2p=off, fractional_reserve=0, extent=off,
try_first=snap_delete, read_realloc=off,
snapshot_clone_dependency=on,
dlog_hole_reserve=off, nbu_archival_snap=off
Volume UUID: 7b8eafca-c6b0-4bbb-a685-9d0673603492
Containing aggregate: 'ag1'

Plex /ag1/plex0: online, normal, active
RAID group /ag1/plex0/rg0: normal, block checksums
RAID group /ag1/plex0/rg1: normal, block checksums
RAID group /ag1/plex0/rg2: normal, block checksums

Snapshot autodelete settings for VolName:
state=on
commitment=try
trigger=volume
target_free_space=10%
delete_order=oldest_first
defer_delete=user_created
prefix=(not specified)
destroy_list=none
Volume autosize settings:
mode=off
Hybrid Cache:
Eligibility=read-write

FilerName> snap list VolName
Volume VolName
working...

%/used %/total date name
---------- ---------- ------------ --------
1% ( 1%) 0% ( 0%) Oct 16 01:00 sqlsnap__Server1_10-16-2020_01.00.11
32% (32%) 6% ( 6%) Sep 08 01:00 sqlsnap__Server1_09-08-2020_01.00.09 (busy,LUNs)
57% (45%) 17% (11%) May 25 01:01 sqlsnap__Server1_05-25-2020_01.00.19 (busy,LUNs)
68% (45%) 28% (11%) Apr 23 01:00 sqlsnap__Server1_04-23-2020_01.00.11 (busy,LUNs)
75% (45%) 39% (11%) Mar 20 01:00 sqlsnap__Server1_03-20-2020_01.00.10 (busy,LUNs)
77% (26%) 44% ( 5%) Aug 26 01:01 sqlsnap__Server1_08-26-2019_01.00.20 (busy,LUNs)
77% ( 1%) 44% ( 0%) Aug 25 01:01 sqlsnap__Server1_08-25-2019_01.00.21 (busy,LUNs)
79% (26%) 49% ( 5%) Aug 02 01:00 sqlsnap__Server1_08-02-2019_01.00.20 (busy,LUNs)
80% (22%) 52% ( 4%) Jul 24 01:00 sqlsnap__Server1_07-24-2019_01.00.14 (busy,LUNs)
81% (19%) 55% ( 3%) Jul 12 01:00 sqlsnap__Server1_07-12-2019_01.00.10 (busy,LUNs)
81% (12%) 57% ( 2%) Jun 30 01:00 sqlsnap__Server1_06-30-2019_01.00.12 (busy,LUNs)
82% (14%) 59% ( 2%) May 28 01:00 sqlsnap__Server1_05-28-2019_01.00.14 (busy,LUNs)
82% (14%) 61% ( 2%) Apr 03 01:00 sqlsnap__Server1_04-03-2019_01.00.12 (busy,LUNs)

thanks...

Re: Snapshot Deletion - Ignore Owners

Ontapforrum — Fri, 16 Oct 2020 09:50:25 GMT

ok, output does help.

The snapshot naming 'sqlsnap__*' indicates that these snaps are by-product of "SnapManager for SQL Server". Could you login to your SMSQL (Windows) box (Which would also have snapdrive installed) and take a look at the cloned luns. It may not be connected to hosts but it will be existing inside a snap. You can try splitting,deleting clone using 'snapdrive' first and then snaps could be deleted.

Please see these 2 kb:
1) https://library.netapp.com/ecmdocs/ECMP1552619/html/GUID-A464399F-5DDB-4D3E-ADDE-EA5280B7F7F4.html
2) https://library.netapp.com/ecmdocs/ECMP1552619/html/GUID-9601EF6A-68B7-48F8-862E-E9E2487F0A25.html

Re: Snapshot Deletion - Ignore Owners

MohamedShehata — Fri, 23 Oct 2020 18:21:48 GMT

Hello,

i was actually able to view the LUNs i am looking for on the vfiler level [vfiler run VfilerName lun show] so i destroyed them and that solved the problem, much thanks for your response and support as usual 🙂

Re: Snapshot Deletion - Ignore Owners

darb0505 — Fri, 23 Oct 2020 18:53:04 GMT

Hi Mohamed Shehata,

Glad to here that you were able to see and destroy the luns which corrected the issue. Let us know if you need any other assistance.

Thanks