SOLVED Snapshots gone

[twisted]

All my snapshots disappeared on my FreeNAS server and now they only go back as far as Sunday the 15/01/2017. This is fine, I don't need to restore anything from snapshot but I am trying to figure out why they were deleted. I've output the contents from "cat messages | grep destroy" below. I can't see any mention of any snapshots being deleted except old ones from 2016. Am I looking in the wrong spot?

Code:

Jan 15 00:00:00 freenas syslog-ng[1350]: Configuration reload request received, reloading configuration;
Jan 15 00:15:06 freenas autosnap.py: [tools.autosnap:66] Popen()ing: /sbin/zfs snapshot "datapool1/data@auto-20170115.0015-2w"
Jan 15 00:15:06 freenas autosnap.py: [tools.autosnap:66] Popen()ing: /sbin/zfs destroy -r -d "datapool1/data@auto-20161217.0015-2w"
Jan 15 00:15:06 freenas autosnap.py: [tools.autosnap:66] Popen()ing: /sbin/zfs destroy -r -d "datapool1/data@auto-20161213.0015-2w"
Jan 15 00:15:07 freenas autosnap.py: [tools.autosnap:66] Popen()ing: /sbin/zfs destroy -r -d "datapool1/data@auto-20161209.0015-2w"
Jan 15 00:15:07 freenas autosnap.py: [tools.autosnap:66] Popen()ing: /sbin/zfs destroy -r -d "datapool1/data@auto-20161220.0015-2w"
Jan 15 00:15:07 freenas autosnap.py: [tools.autosnap:66] Popen()ing: /sbin/zfs destroy -r -d "datapool1/data@auto-20161212.0015-2w"
Jan 15 00:15:07 freenas autosnap.py: [tools.autosnap:66] Popen()ing: /sbin/zfs destroy -r -d "datapool1/data@auto-20161215.0015-2w"
Jan 15 00:15:07 freenas autosnap.py: [tools.autosnap:66] Popen()ing: /sbin/zfs destroy -r -d "datapool1/data@auto-20161221.0015-2w"
Jan 15 00:15:08 freenas autosnap.py: [tools.autosnap:66] Popen()ing: /sbin/zfs destroy -r -d "datapool1/data@auto-20161211.0015-2w"
Jan 15 00:15:08 freenas autosnap.py: [tools.autosnap:66] Popen()ing: /sbin/zfs destroy -r -d "datapool1/data@auto-20161214.0015-2w"
Jan 15 00:15:08 freenas autosnap.py: [tools.autosnap:66] Popen()ing: /sbin/zfs destroy -r -d "datapool1/data@auto-20161208.0015-2w"
Jan 15 00:15:08 freenas autosnap.py: [tools.autosnap:66] Popen()ing: /sbin/zfs destroy -r -d "datapool1/data@auto-20161210.0015-2w"
Jan 15 00:15:09 freenas autosnap.py: [tools.autosnap:66] Popen()ing: /sbin/zfs destroy -r -d "datapool1/data@auto-20161216.0015-2w"
Jan 15 00:15:09 freenas autosnap.py: [tools.autosnap:66] Popen()ing: /sbin/zfs destroy -r -d "datapool1/data@auto-20161219.0015-2w"
Jan 15 00:15:09 freenas autosnap.py: [tools.autosnap:66] Popen()ing: /sbin/zfs destroy -r -d "datapool1/data@auto-20161218.0015-2w"
Jan 15 01:30:03 freenas autosnap.py: [tools.autosnap:66] Popen()ing: /sbin/zfs snapshot "datapool1/macbackup@auto-20170115.0130-2w"
Jan 15 01:30:04 freenas autosnap.py: [tools.autosnap:66] Popen()ing: /sbin/zfs destroy -r -d "datapool1/macbackup@auto-20161215.0130-2w"
Jan 15 01:30:04 freenas autosnap.py: [tools.autosnap:66] Popen()ing: /sbin/zfs destroy -r -d "datapool1/macbackup@auto-20161210.0130-2w"
Jan 15 01:30:05 freenas autosnap.py: [tools.autosnap:66] Popen()ing: /sbin/zfs destroy -r -d "datapool1/macbackup@auto-20161211.0130-2w"
Jan 15 01:30:05 freenas autosnap.py: [tools.autosnap:66] Popen()ing: /sbin/zfs destroy -r -d "datapool1/macbackup@auto-20161221.0130-2w"
Jan 15 01:30:05 freenas autosnap.py: [tools.autosnap:66] Popen()ing: /sbin/zfs destroy -r -d "datapool1/macbackup@auto-20161220.0130-2w"
Jan 15 01:30:05 freenas autosnap.py: [tools.autosnap:66] Popen()ing: /sbin/zfs destroy -r -d "datapool1/macbackup@auto-20161218.0130-2w"
Jan 15 01:30:05 freenas autosnap.py: [tools.autosnap:66] Popen()ing: /sbin/zfs destroy -r -d "datapool1/macbackup@auto-20161219.0130-2w"
Jan 15 01:30:05 freenas autosnap.py: [tools.autosnap:66] Popen()ing: /sbin/zfs destroy -r -d "datapool1/macbackup@auto-20161217.0130-2w"
Jan 15 01:30:06 freenas autosnap.py: [tools.autosnap:66] Popen()ing: /sbin/zfs destroy -r -d "datapool1/macbackup@auto-20161213.0130-2w"
Jan 15 01:30:06 freenas autosnap.py: [tools.autosnap:66] Popen()ing: /sbin/zfs destroy -r -d "datapool1/macbackup@auto-20161216.0130-2w"
Jan 15 01:30:06 freenas autosnap.py: [tools.autosnap:66] Popen()ing: /sbin/zfs destroy -r -d "datapool1/macbackup@auto-20161208.0130-2w"
Jan 15 01:30:06 freenas autosnap.py: [tools.autosnap:66] Popen()ing: /sbin/zfs destroy -r -d "datapool1/macbackup@auto-20161212.0130-2w"
Jan 15 01:30:06 freenas autosnap.py: [tools.autosnap:66] Popen()ing: /sbin/zfs destroy -r -d "datapool1/macbackup@auto-20161209.0130-2w"
Jan 15 01:30:06 freenas autosnap.py: [tools.autosnap:66] Popen()ing: /sbin/zfs destroy -r -d "datapool1/macbackup@auto-20161214.0130-2w"
Jan 16 00:00:00 freenas syslog-ng[1350]: Configuration reload request received, reloading configuration;
Jan 16 00:15:03 freenas autosnap.py: [tools.autosnap:66] Popen()ing: /sbin/zfs snapshot "datapool1/data@auto-20170116.0015-2w"
Jan 16 01:30:03 freenas autosnap.py: [tools.autosnap:66] Popen()ing: /sbin/zfs snapshot "datapool1/macbackup@auto-20170116.0130-2w"
Jan 17 00:00:00 freenas syslog-ng[1350]: Configuration reload request received, reloading configuration;
Jan 17 00:15:03 freenas autosnap.py: [tools.autosnap:66] Popen()ing: /sbin/zfs snapshot "datapool1/data@auto-20170117.0015-2w"
Jan 17 01:30:03 freenas autosnap.py: [tools.autosnap:66] Popen()ing: /sbin/zfs snapshot "datapool1/macbackup@auto-20170117.0130-2w"
Jan 18 00:00:00 freenas syslog-ng[1350]: Configuration reload request received, reloading configuration;
Jan 18 00:15:03 freenas autosnap.py: [tools.autosnap:66] Popen()ing: /sbin/zfs snapshot "datapool1/data@auto-20170118.0015-2w"
Jan 18 01:30:03 freenas autosnap.py: [tools.autosnap:66] Popen()ing: /sbin/zfs snapshot "datapool1/macbackup@auto-20170118.0130-2w"

Is there anywhere else I can look to see what caused the old snapshots to be removed? I recently upgraded to FreeNAS-9.10.2-U1 (86c7ef5). Not sure if something happened during the upgrade.

 

[mjt5282]

it appears to be expiring (deleting) old snaps but only creating snaps daily (at 00:15) for pool1/data and pool1/macbackup. Perhaps new tasks have to be created to snap more often and recursively?

 

[twisted]

Nothing's changed for my periodic snapshot task. I've attached a screenshot of the tasks. Pretty much been setup like this since day 1. I updated FreeNAS on 14/01/2017, seems to be pretty close. The uptime seems to coincide with the snapshots disappearing.

Code:

[root@freenas] ~# uptime
10:13AM  up 3 days, 17:06, 1 user, load averages: 0.39, 0.42, 0.41

 

[mjt5282]

from your task list, the snapshots have a "lifetime" of 2 weeks. You can extend that if you like. if You have the disk space, I would recommend 1 month minimum.

 

[twisted]

For this particular box 2 weeks is good because there's nothing critical on there. 2 weeks should mean the snapshots go back until the 4th? It just seems really odd to have 2TB of snapshots disappear and there doesn't seem to be anything in the logs I can see that show why.

 

[Robert Trevellyan]

Have you tried zpool history?

 

[twisted]

I've run zpool history, good parameter to know learn. I suppose there has been some of issue with snapshots not running. The records go all the way back to 2013, but for some sort of brevity, I've included history from 28/11/2016. It looks like the last snapshot and snapshot cleanup was on 21/12/2016 and then there was a gap until the 15/01/2017. So it looks like a snapshots stopped working which would explain a lot :0

Code:

2016-11-28.00:15:05 zfs snapshot datapool1/data@auto-20161128.0015-2w
2016-11-28.00:15:10 zfs destroy -r -d datapool1/data@auto-20161114.0015-2w
2016-11-28.01:30:03 zfs snapshot datapool1/macbackup@auto-20161128.0130-2w
2016-11-28.01:30:08 zfs destroy -r -d datapool1/macbackup@auto-20161114.0130-2w
2016-11-29.00:15:04 zfs snapshot datapool1/data@auto-20161129.0015-2w
2016-11-29.00:15:09 zfs destroy -r -d datapool1/data@auto-20161115.0015-2w
2016-11-29.01:30:03 zfs snapshot datapool1/macbackup@auto-20161129.0130-2w
2016-11-29.01:30:08 zfs destroy -r -d datapool1/macbackup@auto-20161115.0130-2w
2016-11-30.00:15:06 zfs snapshot datapool1/data@auto-20161130.0015-2w
2016-11-30.00:15:11 zfs destroy -r -d datapool1/data@auto-20161116.0015-2w
2016-11-30.01:30:03 zfs snapshot datapool1/macbackup@auto-20161130.0130-2w
2016-11-30.01:30:08 zfs destroy -r -d datapool1/macbackup@auto-20161116.0130-2w
2016-12-01.00:15:04 zfs snapshot datapool1/data@auto-20161201.0015-2w
2016-12-01.00:15:09 zfs destroy -r -d datapool1/data@auto-20161117.0015-2w
2016-12-01.01:30:03 zfs snapshot datapool1/macbackup@auto-20161201.0130-2w
2016-12-01.01:30:08 zfs destroy -r -d datapool1/macbackup@auto-20161117.0130-2w
2016-12-02.00:15:06 zfs snapshot datapool1/data@auto-20161202.0015-2w
2016-12-02.00:15:11 zfs destroy -r -d datapool1/data@auto-20161118.0015-2w
2016-12-02.01:30:03 zfs snapshot datapool1/macbackup@auto-20161202.0130-2w
2016-12-02.01:30:08 zfs destroy -r -d datapool1/macbackup@auto-20161118.0130-2w
2016-12-03.00:15:06 zfs snapshot datapool1/data@auto-20161203.0015-2w
2016-12-03.00:15:11 zfs destroy -r -d datapool1/data@auto-20161119.0015-2w
2016-12-03.01:30:03 zfs snapshot datapool1/macbackup@auto-20161203.0130-2w
2016-12-03.01:30:08 zfs destroy -r -d datapool1/macbackup@auto-20161119.0130-2w
2016-12-04.00:15:06 zfs snapshot datapool1/data@auto-20161204.0015-2w
2016-12-04.00:15:11 zfs destroy -r -d datapool1/data@auto-20161120.0015-2w
2016-12-04.01:30:03 zfs snapshot datapool1/macbackup@auto-20161204.0130-2w
2016-12-04.01:30:08 zfs destroy -r -d datapool1/macbackup@auto-20161120.0130-2w
2016-12-05.00:15:04 zfs snapshot datapool1/data@auto-20161205.0015-2w
2016-12-05.00:15:09 zfs destroy -r -d datapool1/data@auto-20161121.0015-2w
2016-12-05.01:30:03 zfs snapshot datapool1/macbackup@auto-20161205.0130-2w
2016-12-05.01:30:08 zfs destroy -r -d datapool1/macbackup@auto-20161121.0130-2w
2016-12-05.08:46:30 zpool import -c /data/zfs/zpool.cache.saved -o cachefile=none -R /mnt -f 132893957070868287
2016-12-05.08:46:30 zpool set cachefile=/data/zfs/zpool.cache datapool1
2016-12-05.19:43:59 zpool import -c /data/zfs/zpool.cache.saved -o cachefile=none -R /mnt -f 132893957070868287
2016-12-05.19:43:59 zpool set cachefile=/data/zfs/zpool.cache datapool1
2016-12-06.00:15:06 zfs snapshot datapool1/data@auto-20161206.0015-2w
2016-12-06.00:15:11 zfs destroy -r -d datapool1/data@auto-20161122.0015-2w
2016-12-06.01:30:04 zfs snapshot datapool1/macbackup@auto-20161206.0130-2w
2016-12-06.01:30:09 zfs destroy -r -d datapool1/macbackup@auto-20161122.0130-2w
2016-12-07.00:15:03 zfs snapshot datapool1/data@auto-20161207.0015-2w
2016-12-07.00:15:08 zfs destroy -r -d datapool1/data@auto-20161123.0015-2w
2016-12-07.01:30:03 zfs snapshot datapool1/macbackup@auto-20161207.0130-2w
2016-12-07.01:30:08 zfs destroy -r -d datapool1/macbackup@auto-20161123.0130-2w
2016-12-08.00:15:03 zfs snapshot datapool1/data@auto-20161208.0015-2w
2016-12-08.00:15:08 zfs destroy -r -d datapool1/data@auto-20161124.0015-2w
2016-12-08.01:30:03 zfs snapshot datapool1/macbackup@auto-20161208.0130-2w
2016-12-08.01:30:08 zfs destroy -r -d datapool1/macbackup@auto-20161124.0130-2w
2016-12-09.00:15:06 zfs snapshot datapool1/data@auto-20161209.0015-2w
2016-12-09.00:15:11 zfs destroy -r -d datapool1/data@auto-20161125.0015-2w
2016-12-09.01:30:03 zfs snapshot datapool1/macbackup@auto-20161209.0130-2w
2016-12-09.01:30:08 zfs destroy -r -d datapool1/macbackup@auto-20161125.0130-2w
2016-12-10.00:15:06 zfs snapshot datapool1/data@auto-20161210.0015-2w
2016-12-10.00:15:11 zfs destroy -r -d datapool1/data@auto-20161126.0015-2w
2016-12-10.01:30:03 zfs snapshot datapool1/macbackup@auto-20161210.0130-2w
2016-12-10.01:30:08 zfs destroy -r -d datapool1/macbackup@auto-20161126.0130-2w
2016-12-11.00:00:15 zpool scrub datapool1
2016-12-11.00:15:07 zfs snapshot datapool1/data@auto-20161211.0015-2w
2016-12-11.00:15:14 zfs destroy -r -d datapool1/data@auto-20161127.0015-2w
2016-12-11.01:30:07 zfs snapshot datapool1/macbackup@auto-20161211.0130-2w
2016-12-11.01:30:13 zfs destroy -r -d datapool1/macbackup@auto-20161127.0130-2w
2016-12-12.00:15:06 zfs snapshot datapool1/data@auto-20161212.0015-2w
2016-12-12.00:15:11 zfs destroy -r -d datapool1/data@auto-20161128.0015-2w
2016-12-12.01:30:03 zfs snapshot datapool1/macbackup@auto-20161212.0130-2w
2016-12-12.01:30:08 zfs destroy -r -d datapool1/macbackup@auto-20161128.0130-2w
2016-12-13.00:15:06 zfs snapshot datapool1/data@auto-20161213.0015-2w
2016-12-13.00:15:11 zfs destroy -r -d datapool1/data@auto-20161129.0015-2w
2016-12-13.01:30:21 zfs snapshot datapool1/macbackup@auto-20161213.0130-2w
2016-12-13.01:30:26 zfs destroy -r -d datapool1/macbackup@auto-20161129.0130-2w
2016-12-14.00:15:06 zfs snapshot datapool1/data@auto-20161214.0015-2w
2016-12-14.00:15:11 zfs destroy -r -d datapool1/data@auto-20161130.0015-2w
2016-12-14.01:30:03 zfs snapshot datapool1/macbackup@auto-20161214.0130-2w
2016-12-14.01:30:08 zfs destroy -r -d datapool1/macbackup@auto-20161130.0130-2w
2016-12-15.00:15:06 zfs snapshot datapool1/data@auto-20161215.0015-2w
2016-12-15.00:15:11 zfs destroy -r -d datapool1/data@auto-20161201.0015-2w
2016-12-15.01:30:03 zfs snapshot datapool1/macbackup@auto-20161215.0130-2w
2016-12-15.01:30:08 zfs destroy -r -d datapool1/macbackup@auto-20161201.0130-2w
2016-12-16.00:15:06 zfs snapshot datapool1/data@auto-20161216.0015-2w
2016-12-16.00:15:11 zfs destroy -r -d datapool1/data@auto-20161202.0015-2w
2016-12-16.01:30:03 zfs snapshot datapool1/macbackup@auto-20161216.0130-2w
2016-12-16.01:30:08 zfs destroy -r -d datapool1/macbackup@auto-20161202.0130-2w
2016-12-17.00:15:06 zfs snapshot datapool1/data@auto-20161217.0015-2w
2016-12-17.00:15:11 zfs destroy -r -d datapool1/data@auto-20161203.0015-2w
2016-12-17.01:30:03 zfs snapshot datapool1/macbackup@auto-20161217.0130-2w
2016-12-17.01:30:08 zfs destroy -r -d datapool1/macbackup@auto-20161203.0130-2w
2016-12-17.17:18:29 zpool import -c /data/zfs/zpool.cache.saved -o cachefile=none -R /mnt -f 132893957070868287
2016-12-17.17:18:29 zpool set cachefile=/data/zfs/zpool.cache datapool1
2016-12-18.00:15:06 zfs snapshot datapool1/data@auto-20161218.0015-2w
2016-12-18.00:15:11 zfs destroy -r -d datapool1/data@auto-20161204.0015-2w
2016-12-18.01:30:03 zfs snapshot datapool1/macbackup@auto-20161218.0130-2w
2016-12-18.01:30:08 zfs destroy -r -d datapool1/macbackup@auto-20161204.0130-2w
2016-12-19.00:15:06 zfs snapshot datapool1/data@auto-20161219.0015-2w
2016-12-19.00:15:11 zfs destroy -r -d datapool1/data@auto-20161205.0015-2w
2016-12-19.01:30:03 zfs snapshot datapool1/macbackup@auto-20161219.0130-2w
2016-12-19.01:30:08 zfs destroy -r -d datapool1/macbackup@auto-20161205.0130-2w
2016-12-20.00:15:05 zfs snapshot datapool1/data@auto-20161220.0015-2w
2016-12-20.00:15:11 zfs destroy -r -d datapool1/data@auto-20161206.0015-2w
2016-12-20.01:30:03 zfs snapshot datapool1/macbackup@auto-20161220.0130-2w
2016-12-20.01:30:08 zfs destroy -r -d datapool1/macbackup@auto-20161206.0130-2w
2016-12-21.00:15:03 zfs snapshot datapool1/data@auto-20161221.0015-2w
2016-12-21.00:15:08 zfs destroy -r -d datapool1/data@auto-20161207.0015-2w
2016-12-21.01:30:03 zfs snapshot datapool1/macbackup@auto-20161221.0130-2w
2016-12-21.01:30:08 zfs destroy -r -d datapool1/macbackup@auto-20161207.0130-2w
2016-12-21.08:50:54 zpool import -c /data/zfs/zpool.cache.saved -o cachefile=none -R /mnt -f 132893957070868287
2016-12-21.08:50:54 zpool set cachefile=/data/zfs/zpool.cache datapool1
2016-12-25.00:00:13 zpool scrub datapool1
2017-01-08.00:00:12 zpool scrub datapool1
2017-01-14.17:03:03 zpool import -c /data/zfs/zpool.cache.saved -o cachefile=none -R /mnt -f 132893957070868287
2017-01-14.17:03:03 zpool set cachefile=/data/zfs/zpool.cache datapool1
2017-01-14.17:08:39 zpool import -c /data/zfs/zpool.cache.saved -o cachefile=none -R /mnt -f 132893957070868287
2017-01-14.17:08:39 zpool set cachefile=/data/zfs/zpool.cache datapool1
2017-01-15.00:15:06 zfs snapshot datapool1/data@auto-20170115.0015-2w
2017-01-15.00:15:06 zfs destroy -r -d datapool1/data@auto-20161217.0015-2w
2017-01-15.00:15:07 zfs destroy -r -d datapool1/data@auto-20161213.0015-2w
2017-01-15.00:15:07 zfs destroy -r -d datapool1/data@auto-20161209.0015-2w
2017-01-15.00:15:07 zfs destroy -r -d datapool1/data@auto-20161220.0015-2w
2017-01-15.00:15:07 zfs destroy -r -d datapool1/data@auto-20161212.0015-2w
2017-01-15.00:15:07 zfs destroy -r -d datapool1/data@auto-20161215.0015-2w
2017-01-15.00:15:08 zfs destroy -r -d datapool1/data@auto-20161221.0015-2w
2017-01-15.00:15:08 zfs destroy -r -d datapool1/data@auto-20161211.0015-2w
2017-01-15.00:15:08 zfs destroy -r -d datapool1/data@auto-20161214.0015-2w
2017-01-15.00:15:08 zfs destroy -r -d datapool1/data@auto-20161208.0015-2w
2017-01-15.00:15:09 zfs destroy -r -d datapool1/data@auto-20161210.0015-2w
2017-01-15.00:15:09 zfs destroy -r -d datapool1/data@auto-20161216.0015-2w
2017-01-15.00:15:09 zfs destroy -r -d datapool1/data@auto-20161219.0015-2w
2017-01-15.00:15:18 zfs destroy -r -d datapool1/data@auto-20161218.0015-2w
2017-01-15.01:30:04 zfs snapshot datapool1/macbackup@auto-20170115.0130-2w
2017-01-15.01:30:04 zfs destroy -r -d datapool1/macbackup@auto-20161215.0130-2w
2017-01-15.01:30:05 zfs destroy -r -d datapool1/macbackup@auto-20161210.0130-2w
2017-01-15.01:30:05 zfs destroy -r -d datapool1/macbackup@auto-20161211.0130-2w
2017-01-15.01:30:05 zfs destroy -r -d datapool1/macbackup@auto-20161221.0130-2w
2017-01-15.01:30:05 zfs destroy -r -d datapool1/macbackup@auto-20161220.0130-2w
2017-01-15.01:30:05 zfs destroy -r -d datapool1/macbackup@auto-20161218.0130-2w
2017-01-15.01:30:05 zfs destroy -r -d datapool1/macbackup@auto-20161219.0130-2w
2017-01-15.01:30:06 zfs destroy -r -d datapool1/macbackup@auto-20161217.0130-2w
2017-01-15.01:30:06 zfs destroy -r -d datapool1/macbackup@auto-20161213.0130-2w
2017-01-15.01:30:06 zfs destroy -r -d datapool1/macbackup@auto-20161216.0130-2w
2017-01-15.01:30:06 zfs destroy -r -d datapool1/macbackup@auto-20161208.0130-2w
2017-01-15.01:30:06 zfs destroy -r -d datapool1/macbackup@auto-20161212.0130-2w
2017-01-15.01:30:06 zfs destroy -r -d datapool1/macbackup@auto-20161209.0130-2w
2017-01-15.01:30:11 zfs destroy -r -d datapool1/macbackup@auto-20161214.0130-2w
2017-01-16.00:15:08 zfs snapshot datapool1/data@auto-20170116.0015-2w
2017-01-16.01:30:08 zfs snapshot datapool1/macbackup@auto-20170116.0130-2w
2017-01-17.00:15:08 zfs snapshot datapool1/data@auto-20170117.0015-2w
2017-01-17.01:30:08 zfs snapshot datapool1/macbackup@auto-20170117.0130-2w
2017-01-18.00:15:08 zfs snapshot datapool1/data@auto-20170118.0015-2w
2017-01-18.01:30:08 zfs snapshot datapool1/macbackup@auto-20170118.0130-2w

I can see some bugs and updates in the latest release notes.

#10042 Feature Nice to have alert email when failing to create automatic snapshots
#17904 Bug Ready For Release Expected Failed to report when snapshot failed to create

Hopefully it alerts better if a snapshot fails now :)