Same here.. HP ML 370 G6 w/ 2 x E5520 and 12 gb RAM, P410i 256 mb without BBWC ESXi 3.5 U4.

2-3 MB/s write rate, which is unbelivable! Even without BBWC...

We have a HP XW4600 workstation w/ 1 x 500gb SATA for test purposes ESXi 3.5 U3, it easily writes 20 MB/s ++ with ACHI disabled (IDE mode)

BBWC battery kit ordered!

:S

Disk write can peak up to about 10 MB/s, but after a few secs goes down to 2-3 MB/s, have just one VM on this server ATM. (2008 server std 64 bit)

What I feel is so strange is that a normal (E8500, single SATA) workstation performs much better (disk write) than this brand new ML 370 G6, even without BBWC I expected the ML 370 to perform better!!

Just download the RCLI or VIMA. vmkfstools is included in those.

Duncan
VMware Communities User Moderator | VCP | VCDX

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I Have the Same Problem

ML350 G6 410i RAID Card - ESX 3.5 update4

Call Logged to VMWare

Call Logged to HP - who are not being terribly helpfull - they have asked we run Array Diagnostic Utility from Smartstart.

We are running into this problem with one of our clients at the moment, can I ask - once you installed the BBWC and it was fully charged did the write performance improve without further adminisatrative intervention ordid you have to change some settings after the 2-3 days charging? Obviously we're going to upgrade them to BBWC and I'm just wondering whether we'll need to schedule a second maintenance window to configure the write caching on the controller once the battery charges.

> we confirmed that our 8 disk RAID 50 volume was able to write at 70 MB/s (at least as long as the RAID cache didn't get saturated)

Is this sequential performance? I ask since it still seems quite low, the P400's should be able to achive over 150MB/s write according to this: http://cnscenter.future.co.kr/resource/rsc-center2/Tolly/Tolly206162Intel-IOP333SASRAID.pdf

I wonder if there is a partition alignment issue? (http://www.vmware.com/pdf/esx3_partition_align.pdf)

I read on here a while ago that automatically created VMFS partitions are not properly aligned and should be deleted and re-created using the VI Client - can't find it now predictably.