# Verifying Backend Data

**URL:** <https://forum.duplicati.com/t/verifying-backend-data/348>\
**Category:** Support\
**Created:** [August 31, 2017, 1:32am UTC](https://forum.duplicati.com/t/verifying-backend-data/348 "2017-08-31T01:32:23Z")\
**Posts on this page:** 1\
**Showing post:** 9

<div class="post-metadata">

**Author:** ![sinkva](https://forum.duplicati.com/letter_avatar_proxy/v4/letter/s/9fc29f/32.png) [@sinkva](https://forum.duplicati.com/u/sinkva)\
**Post date:** [November 28, 2017, 6:02am UTC](https://forum.duplicati.com/t/verifying-backend-data/348/9 "2017-11-28T06:02:37Z")

</div>

Similar poor experience:  
running Duplicati - 2.0.2.12\_canary\_2017-10-20  
MacOS - El Capitan

Duplicati stalls showing “Verifying backend data …” in status bar.

Live profiling shows last entry is:

```
Nov 27, 2017 11:46 PM: Starting - ExecuteReader: SELECT "A"."Hash", "C"."Hash" FROM (SELECT "BlocklistHash"."BlocksetID", "Block"."Hash", * FROM "BlocklistHash","Block" WHERE "BlocklistHash"."Hash" = "Block"."Hash" AND "Block"."VolumeID" = ?) A, "BlocksetEntry" B, "Block" C WHERE "B"."BlocksetID" = "A"."BlocksetID" AND "B"."Index" >= ("A"."Index" * 3200) AND "B"."Index" < (("A"."Index" + 1) * 3200) AND "C"."ID" = "B"."BlockID" ORDER BY "A"."BlocksetID", "B"."Index"

```

mono-sgen64 is running at 99% CPU, but nothing is happening…

---

_[View the full topic](https://forum.duplicati.com/t/verifying-backend-data/348)._