Welcome to the MacNN Forums.

If this is your first visit, be sure to check out the FAQ by clicking the link above. You may have to register before you can post: click the register link above to proceed. To start viewing messages, select the forum that you want to visit from the selection below.

You are here: MacNN Forums > Enthusiast Zone > Classic Macs and Mac OS > Startup Disk / RAM disk

Startup Disk / RAM disk
Thread Tools
Mac Enthusiast
Join Date: Jun 2000
Location: Sydney, Australia
Status: Offline
Reply With Quote
Jul 12, 2001, 01:50 PM
 
I know that booting from a RAM disk on G3 and later Macs has been disabled by Mac techs, but according to Mac Secrets there's a way to do it it's just been disabled by the techs because it was considered not always reliable. I've put a system folder on my RAM Disk and although it shows up in the Startup Disk control panel it's dimmed out. Anyone have any possible solutions on how to get around this?
     
Forum Regular
Join Date: Feb 2001
Status: Offline
Reply With Quote
Jul 12, 2001, 02:46 PM
 
The reason why starting up from a RAM disk was disabled in G3 or later models was that these computers take longer to initialize than the RAM can sustain it's contents without power. Therefore, if you put a System Folder on a RAM disk, it is gone by the time you restart.

(53)
     
Clinically Insane
Join Date: Apr 2000
Status: Offline
Reply With Quote
Jul 19, 2001, 07:47 AM
 
Originally posted by AppleScript:
<STRONG>The reason why starting up from a RAM disk was disabled in G3 or later models was that these computers take longer to initialize than the RAM can sustain it's contents without power. Therefore, if you put a System Folder on a RAM disk, it is gone by the time you restart.

(53)</STRONG>
The way it worked was, given a terminate appleevent (like restart, shutdown), the contents were saved to the HD, then read at startup. Given a crash, contents would be lost.

The contents have to be copied to RAM, which is limited to the HD's speed anyway...

Now the reason it was disabled, well, that was during the change from the Old World Macs to the New World Macs (OWR/NRW). Just one of those things

[ 07-19-2001: Message edited by: Cipher13 ]
     
Forum Regular
Join Date: Jun 2001
Location: Springfield, MO
Status: Offline
Reply With Quote
Jul 19, 2001, 01:04 PM
 
Silly newbie question alert:

What exactly is a RAM disk? I saw the option for it. But I dunno what it is?
RedHerring: Trying to do more than convert air into carbon dioxide since 1979...
     
Forum Regular
Join Date: Feb 2001
Status: Offline
Reply With Quote
Jul 19, 2001, 02:03 PM
 
A RAM disk is a disk whose contents are found in the main computer RAM. The advantage of using one is that it is extremely fast. The problem is that having one uses up some of your main RAM, and that it's contents are erased upon shutdown.

(57)
     
   
Thread Tools
Forum Links
Forum Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts
BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On
Top
Privacy Policy
All times are GMT -4. The time now is 02:58 PM.
All contents of these forums © 1995-2014 MacNN. All rights reserved.
Branding + Design: www.gesamtbild.com
vBulletin v.3.8.8 © 2000-2014, Jelsoft Enterprises Ltd., Content Relevant URLs by vBSEO 3.3.2