Seagate Cheetah 15.K7 write performance issue

I bought a Seagate Cheetah 600GB ST3600057SS SAS hard drive and it has a problem with file transfers. I have tested it on three different PCs and three different SAS Controllers. Transfer rate with a Seagate Cheetah 15.7k and a WD VelociRaptor 600GB is initially fast, 80-100MB/s, but later it slows down to 10MB/s and stays there.

Seagate 600GB SAS slow file move Windows 8


I tested some more, and HD Tach seems to reproduce the issue.

Seagate 600GB SAS on LSI 9211-4I new fw HD Tune Write Windows 8

Seagate 600GB SAS on LSI new fm HD Tune file transfer Windows 8


Read and random access is fine

Seagate 600GB SAS on Adaptec 2405 HD Tune Read Windows 8



I got a new drive, and it has the same problem. I tested it in a different computer this time, and it was now detected by Seatools. I ran three tests, and they all passed.

Short Drive Self Test (Short DST) – pass
Generic short – Pass
Generic Long – Pass


Success! 😀

I switched for a Hitachi 15K600 Ultrastar 0B23663 HUS156060VLS600 and write performance is fine, both in Windows 7 and Windows 8.

Hitachi 600GB SAS on RocketRAID HD Tune Write Windows 8



I have been in contact with Seagate tech support and here is what they said:

– I apologize for any inconvenience this may have caused you. Unfortunately we do not have any tools that test the sequential write performance. Normally if there are issues with the drive , Seatools would fail the tests or give you an error code.

This means that Seagate does not have any way of testing performance, and you are stuck with a problematic drive. Due to this, I won’t be buying Seagate products for a while. I was lucky that my retailer where I bought the drive accepted my returns and let me change to a Hitachi drive.

I have also found other threads with the same issue with Seagate Cheetah drives:

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