I have 3 of them  from amazon running in my sas server. They seem to work fine so far. They are refurbished, but to me they are worth the discounted price (especially since I’m covered with my raid).  I just finish running my disc scans to confirm that they are error free. Two of mine had 4 years of run time while the drive I just bought had 2 years.  
The sellers also offer 3 year warranties which is a bonus. 

[Product sheet on the 6TB Enterprise Capacity 3.5 HDD](https://www.seagate.com/www-content/product-content/enterprise-hdd-fam/enterprise-capacity-3-5-hdd/constellation-es-4/en-us/docs/enterprise-capacity-3-5-hdd-v4-ds1791-3-1403us.pdf) for anyone that wants to look it over.

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Seagate Technology | Official Forums Team

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Amazon has 6tb ST6000NM0034 for $90.  Any opinions?   Also will this work with an LSI 9210?

Any opinion on 6tb Seagate Sas drives?