[SOLVED] Hitachi Ultrastar 7K3000 Vs. 7K4000

[MandelaEffect2000]

Hi,

What do you guys make of Hitachi Ultrastar series in terms of reliability?

Also, I could not find the differences between 7K3000 Vs. 7K4000.

Has anyone any opinions on these hard drives?

Thanks!

 

[SkyNetRising]

I could not find the differences between 7K3000 Vs. 7K4000.

Good drives. Difference is capacity - 3TB vs 4TB.

 

[RealBeast]

HGST has since been acquired by WD. The 7K3000 is 512b sectors and older than the 4k advanced format 7K4000 that emulates 512. I would opt for the newer marginally faster 7K4000 but they are both good drives.

edit: highly reliable in my use. I have 8 7K3000 that have been running in a storage array for 8-9 years without a failure. I pretty much always buy HGST, latest I have are the 14GB running in arrays of 8 for > 1yr without a failure. HERE are some Backblaze drive stats for comparison -- look down the page for the cumulative drives going back in time, the 2020 drives at the top are generally larger.

 

[MandelaEffect2000]

HGST has since been acquired by WD. The 7K3000 is 512b sectors and older than the 4k advanced format 7K4000 that emulates 512. I would opt for the newer marginally faster 7K4000 but they are both good drives.

edit: highly reliable in my use. I have 8 7K3000 that have been running in a storage array for 8-9 years without a failure. I pretty much always buy HGST, latest I have are the 14GB running in arrays of 8 for > 1yr without a failure. HERE are some Backblaze drive stats for comparison -- look down the page for the cumulative drives going back in time, the 2020 drives at the top are generally larger.

What does the "512b sectors" mean? Also, how is emulated 512b different to non-emulated 512b? Does it impact reliability in any way?

How does Hitachi Ultrastar series compare to Seagate Barracuda in terms of reliability? In the country where I live the HGST drives are cheaper!

 

[RealBeast]

No difference to you other than not mixing them in a RAID array.

HDDs have had 512 byte sectors since the 1980s but that was becoming a capacity/performance issue so the new standard became advanced format drives with 4096 bit sectors. To insure backward compatibility most consumer drives logically divide each of the 4K sectors into 8 512 byte sectors, known as 512e (512 byte emulated). Newer hardware and OSs can use either 512e or 4K native drives.

As far as failure rates, HGST has been slightly superior overall for many years -- look at the Backblaze link, but recognize that any drive can fail soon due to poor shipping. Once you get past the first few months you usually are good for years.