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?