I do see quite a few 500Gb WD drives tested for the SRCSASLS4I at
Which model are you using?
To narrow down whether it has anything to do with the RAID card - do the drives drop out if you plug straight into one of the motherboards, instead?
The Western Digital drives are RE3 series, model WD5002ABYS. I'm getting identical results with current model 1 TB Seagates, so the drives don't appear to be the issue.
No drives have been connected to the motherboard directly. VMware doesn't support the Intel software RAID, so the RAID card is the only way I can use the system.
I've found nothing about LSI or RAID card and this problem on the net. The issue is only the expander backplane. Intel has published 2 "fixes" for this specific problem, but they are only partial solutions.
I'm wondering if there is some secret configuration setting that I'm missing?