Some HDDs have TLER/ERC/CCTL and some do not...TLER/ERC/CCTL "communicates" with the controller under certain error conditions. For each "type" of RAID (Software, Hardware (separate plug-in, not chipset), BIOS, other??), what are the pros/cons of using TLER/ERC/CCTL HDDs versus using non-TLER/ERC/CCTL HDDs?

I'm mainly interested in comments on BIOS RAID, but it would be helpful to know how the TLER/ERC/CCTL HDDs work with all RAID variants.

Thanks for any input.

There is a good Wikipedia article about this feature. Please find and read it.

This feature limits the amount of time the disk will take in an attempt to recover from an error. This so the raid controller will not see the drive is "hung up" and fail it.