Seagate Exos Enterprise Capacity 3.5'' HDD 4TB 7200 RPM 512n SATA 6Gb/s 128MB Cache Internal Hard Drive ST4000NM0035

Pros: Drives were well packaged for shipping Long 5 year warranty, if valid.

Cons: I checked the warranty status of the drives (while they were still in the sealed anti-static package) with Seagate's online warranty validation page and two of the six drives are not covered by warranty, they were listed as Component* I purchased these drives directly from NewEgg not a marketplace partner. Looks I was shipped used equipment. Listed below is Seagate's details: Component The product you identified was sold as a system component. Please contact your place of purchase for service. Seagate sells many drives to direct OEM (Original Equipment Manufacturer) customers. These products are usually configured for the OEMs only, as components for their systems. You must contact your place of purchase for any warranty support on these drives.

Overall Review: I hope others reading this review have a better experience

Pros: Nothing

Cons: Bad sectors

Overall Review: I purchased this drive twice and both arrived with over 2.1 million KB of bad sectors. Regardless of what articles on line say, using the /f and /r switches will NOT repair bad sectors on HDDs. I sent both back to Platinum Micro for a full refund. Platinum Micro was easy to work with.

Pros: EXOS discs are a SYSTEM ADMIN's DREAM! LONG lasting (MTBF), Exceptional data throughput for SATA (much higher with SAS), super warranty and energy efficient. Built for ENTERPRISE level reliability in demanding production data environments like: Transactional Databases, Email Servers, NAS/SAN Storage, Application Servers, Surveillance Storage Servers and Domain Controllers. Despite their cost they also are great for high demand workstations. Disc level encryption on selected models makes disc retirement easier and more secure.

Cons: Not enough System Admin's take the time to get on these forums and relate their 'real-world' experiences with these products.

Overall Review: I hope this review is helpful to anyone looking at this line of drives and worried about some of the posted reviews related to experience/reliability. I have several hundred of the Seagate EXOS series drives from 1Tib to 14Tib deployed on production systems which I own, rent or administer - in all types of environments from climate controlled datacenter deployments to hot and dirty network closets in industrial environments. These products shine in Mission Critical NAS/SAN Storage, High availability Transactional Databases, Corporate Video Surveillance Storage Systems, Web Server Clusters and Email Server Clusters. I also deploy them in high powered workstations where endurance is necessary and/or desired. All of this endurance/reliability does not mean these drives are not at ease in the average home computer because they work great in an 'everyday' application if you don't mind the cost of entry. The workstation where I am writing this review has a pair of 1Tib Segate Enterprise drives in RAID 1 which have been happily spinning along for 5+ years. The bottom line is this: if your data or the data of your clients is important, these discs are an exceptional choice for reliability and high ROI (return on investment). I see reviews complaining about disc failures related to the EXOS/Enterprise line, I can confidently pass on that I have experienced no such problem with this line of drives. I have NEVER had an EXOS/Enterprise drive come DOA. This doesn't mean that DOA drives don't show up, I have simply never experienced this issue. Again, these drives are targeted for ENTERPRISE level storage systems - they can and do fail like any equipment. That being said, Seagate has NEVER failed to Warranty a failed disc (within the warranty period) from the systems within my responsibility. The difference here might be - ENTERPRISE users keep backup drives on site and in stock for immediate replacement when eventual failures occur so this generally does not become a game ending issue and warranty processing wait times are non-critical. As a service to people looking at this line of drives I checked the average age of my running drives and 65% of the deployed stock has been installed in production environments for 5+ years (approximately 250 drives). I have not had an EXOS disc failure in 235 days (as of this review). I generally purchase some of my discs directly from NEWEGG when the prices are right. Never a warranty issue related to direct purchase from a Seagate authorized reseller. MY CONCLUSION/OPINION: This is an exceptional line of ENTERPRISE level products with a good warranty and superb return on investment.

Pros: Worked in my Synology DS712 NAS Server, just like Synology said it would.

Cons: N/A

Pros: - Incredibly Price - Quiet (I did not hear it at all in a 1U server) - Faster than I expected for a 7200 RPM drive

Cons: - None really

Pros: Well packaged, worked out of the box, quiet. Measured read speed about 15% faster than other 7200 RPM drives.

Cons: Don't bother to read unless you run Linux. When I installed the drives and partitioned them with ext4FS, It immediately showed 30GB unavailable. Mounting the drive the system showed drive activity (LED) every second or so, even with no operations going on. Other drives do not do this. Same results with ext3FS. The only "solution" for this seems to be ReiserFS or BtrFS. There is a newer firmware on Seagate's support site, installing it did not change anything. So, I contacted Seagate asking them for help. Got a fast response, on a Sunday: "In this circumstence please be inform inform that Seagate does not recommend our customer to use the drive with Unix/Linux OS because Seagate does not provide any support for the Unix/Linux OS. So, in this case, we suggest you connect the drive to any Windows OS like windows 7, 8 or 10" I told them that I found it interesting that they supply Linux tools for upgrading firmware but say not to use the drive with Linux. So, they replied: "We apologize for the confusion caused. We actually wanted to say that Seagate drive will work with Linux OS provided the system has required drivers. What we actually meant was that Seagate technical support is restricted to Windows and Mac Operating System and hence we cannot provide support for issues reported with Linux OS. Hence, it would be much appreciated if you can arrange a Windows or Mac system so that we can try formatting the drive to check if there is any issue with the drive. Appreciate your support and cooperation." Be interesting to have a drive full of data and have them suggest this... So, I guess my choice is to run Btrfs without support or return the drives to Newegg. I am disappointed that their site does not tell people about lack of support if you are running Linux.

Overall Review: Seems like a good drive, other than my linux issues. Most folks run Windows so that is probably not the same. We have over 50 drives in ESX (linux) servers.

Pros: This is a very high performing drive. It also comes with a 5 year warranty as long as you do not buy an OEM drive. Check before buying, and after you get it verify it is covered by warranty here: http://support.seagate.com/customer/en-US/warranty_validation.jsp

Cons: Seagate should cover all drives by the 5 year warranty and not make you fight to have it covered.

Overall Review: Remember, NewEgg may be an authorized Seagate reseller but there are third party sellers on here! I bought it from one of them accidentally, and I had to fight to get this covered under warranty. They were able to accomplish this for me in lieu of a return. Now that it's covered, I love the drive! Only Seagate Enterprise, WD Black, and WD Gold have a five year warranty.

Pros: -Fast in retrieving data

Cons: -Came in open box -No manual on how to use Self-Encryption or Secure-Erase. -Seagate support won't explain how to use encryption for drive because they don't want to become liable in case user forgets password. -Loudest hardware on this new rig.