Hi, 

I have run into SQL server database corruption on two luns on a sc5020 running version 7.3.5.8.  Both luns had data reduction ( compression and dedup) active. Have any of you run into something similar? 

We have troubleshooted issue with Dell but their support do not seem to find any issue with the system.

What we see is 'older' ( a day or so) data getting corrupted and sql generating errors like:

sg 8964, Level 16, State 1, Line 1
Table error: Object ID 805577908, index ID 1, partition ID 72057594047954944, alloc unit ID 72057594080395264 (type LOB data). The off-row data node at page (1:1677118), slot 3, text ID 3729863409664 is not referenced.
Msg 8964, Level 16, State 1, Line 1

We see the error happening at a rate of 216Kbytes / 160 Gbytes data.

I know that there was an issue with dell compression
https://www.dell.com/support/article/us/en/04/sln314446/sc-storage-customer-notification-deduplication-operation-can-result-in-unexpected-system-behavior?lang=en

I suspect that there still is issues with dedup. Have you seen anything like this?