[Info-vax] RX2800 sporadic disk I/O slowdowns

[Lawrence D'Oliveiro]

On Fri, 18 Oct 2024 17:09:44 -0500, Craig A. Berry wrote:

> That is exactly what happens when the cache battery on a RAID controller
> dies.

Here’s another question: why does a disk controller need a battery-backed-
up cache? Or indeed any cache at all?

Is this because it tells lies to the OS, saying that the data has been 
safely written to disk when in fact it hasn’t?