Physical Disk Cache Policy
The default cache policy on a physical disk is Enabled in SATA drives and Disabled on SAS drives. When physical disk caching is Enabled, disk I/O performance is improved, but a power outage or equipment failure might result in data loss or corruption.
NOTE: It is recommended that you use a backup power source for all Dell production systems.
On a PERC H200 card, caching is forced to be disabled for all physical disks configured into a virtual disk, regardless of the drive type and default drive settings.
Unsupported Drives
Drives that are not certified by Dell are reported in the BIOS Configuration Utility, also known as <Ctrl><C>.
To view unsupported drives:
1In the BIOS Configuration Utility, navigate to the SAS Topology screen.
2Select the unsupported drive and press <Alt><D> to view the Device Properties screen.
The drive is marked as Uncertified in the Device Properties screen.
Drives that are not certified by Dell are not blocked and you can use them at your own risk.
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