Hello I'm unaware of a white paper that explains the cache options. The options are explained in the OMSA storage manual, page 48. The second storage manual on the page is the correct link. I have already reported that the installation guide is mislabeled as the storage manual: www.dell.com/support/home/product-support/product/dell-openmanage-server-administrator-9.0.1/manuals   Yes, enabling the disk cache should increase performance, but it is not battery backed. If there is a sudden loss of power or a hardware failure in the RAID chain there is an increased chance of data loss/corruption if the disk cache is enabled. I don't know the reason why we enable SATA cache by default, but I suspect it is likely due to complaints about performance on SATA drives. The performance difference is not usually as noticeable on SAS drives. Thanks
Hi, I note the following: NOTE: The default setting for Disk Cache Policy for virtual disks based on SATA drives is Enabled; and for virtual disks based on SAS drives is Disabled. Why is the SAS cache disabled? I thought it would make the disk faster to Enable it. Is there a comprehensive White Paper discussing the various RAID settings for the latest controllers? Thx, John Bradshaw
Disk Speeds