Strange behavior from WD Enterprise 4TB drives

WD Internal Drives Desktop & Mobile Drives
1

I am not sure that i’ve choosen the right place to post an issue, but here it is. I have HP Proliant Microserver Gen8 with Adaptec 6805E Raid Controller. I had 4x 4TB WD Enterprise drives inserted and suddenly i noticed that Raid0 gives me 60 Mb/s write speed on these drives. I took 1 drive out and inserted it into usual PC (good one), checked speed - 15mb/s write - What ?!?!? Took all 4 drives out and they all show same speed. I tried formatting - no change. All tests show that drives’s health is perfect. Drives were new (only 8 months of work in a really low load). Well, i created RMA, WD gave me new drives (really good from them), this time its new WD Gold, i was happy. I inserted these drives into PC to check speed - woah! 210 write on HDD is insane - ok. Then i inserted them into my Microserver and what do you think - 60-80 write speed in any raid mode. I took out 1 WD Gold inserted it back to PC and - what?!?!?!? - 15 mb/s again!
I totally dont understand what is happening, any ideas?

Thank you.

2

Hi there, do you have other internal drives that can be used to test it on the server? Also, can you check the drives’ speed on a different PC as well to see if you get the same result?

3

Hello! Thank you for reply. I’ve tried same operation with pretty old
Hitachi drive - same result: before inserting into Microserver with 6805E i
tested speed on another Microserver without any raid controllers whcih
showed me 130 write speed, after that i inserted it into my Microserver
with 6805E and speed dropped to 60 mb/s (tested on different PCs). So the
question is - how to recover? Fast format didnt help. I started super long
format on 4TB drive which should finish on Monday and i will see if it
helps.

4

4days format didnt help. Read speed is 210 is it should be, write speed - 15 mb/s. Guys i really need help, loosing 4x4Tb Golds is not a joke :frowning: