Hi,
I have a HP Gen8 Microserver with upgraded CPU&RAM (Xeon + 16GB RAM), running ESXi 6.5, with 3 WD Red disks, in *AHCI* mode. My idea is to use the server as NAS (xpenology) + also running other VMs in the same time.
Just in case server breaks, I prefer not having B120i extra RAID layer on my disks, so I could mount them on any other hardware (even a real Synology machine). In other words, I went for AHCI, and disabled B120i, even I'll have my server a bit noisier due to fan increase.
So, let's focus in AHCI with ESXi 6.5.
First, I got a first huge performance problem (horrible 2 MB/s speed!!!) which I solved by disabling Vmware AHCI driver and enabling legacy one (full story here:NXHut - IT and Windows - News: Fix slow disk performance (vmw_ahci driver) in ESXi 6.5 ),
Then, when I thought all was solved... I noticed that write performance is still bad.
My current values with this setup (WD Red 3TB disk) are:
- Read: ~150 MB/s (ok)
- Write: ~17 MB/s (WRONG!!!!).
(measured with a "dd", launched on a Linux cd rescue .iso inside the VM).
If I get rid of Vmware and boot from linux-USB, and repeat former tests, I got the expected 150 MB/s write speed (instead of 17!!).
It's clear vmware (both legacy and non-legacy AHCI driver) is buggy 😞
Anyone using HP Gen8 in AHCI mode with Esxi with no write speed problems? Any solution?
Thanks in advance.
Cheers,
-r
