6 Nov
2010
6 Nov
'10
8:36 a.m.
On 11/5/10 5:13 PM, Ethan Dicks wrote:
Could even do what some 3rd-party DEC
drive emulators did - copy non-volatile to RAM at boot time, then RAM
back to non-volatile when powering down.
In fact there's at least one DEC product that does that. I have an
ESE50, which is an RA90-form-factor drive, 640MB capacity. There's a
3.5" hard drive in the box along with a bank of batteries. When it
loses AC power, it runs from the batteries and copies the contents of
the RAMdisk over to the hard drive, and does the opposite on powerup.
Neat stuff. I may try to put it on the PDP-11/70 at some point.
-Dave
--
Dave McGuire
Port Charlotte, FL