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Ramdisk + harddrive

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Rommel Junta

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May 10, 2013, 7:13:24 AM5/10/13
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Hi,

computer system:

IIgs, Rom 3, 4 meg ram card, 80meg hard drive (scsi).

I would like to know if this is possible. I have been reading up on
FLashBoot software to enable my 4 meg ram as a ramdrive. What i would like
to do is use my ramdisk (max 2400k storage thru flashboot) to hold system
6.0.1, but instead of creating the flashboot image disk on 3.5 diskette, i
would like to put these created image disks on the hard drive and when i
boot the computer up, i want it to access the image disk and ultimately use
the flashboot ramdisk to boot up system 6.0.1. Is this possible? Or should
i leave the system 6.0.1 on physical hard drive? I basically want to test
the speed of the ramdrive upon loading a maxed out system 6.0.1 with
accessories and compare that to my hard drive speed. Any feedback will
always be appreciated, thanks.

Geo3

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May 10, 2013, 9:34:18 AM5/10/13
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Hi,
First you would need a RamCharger. That is a battery backup to keep the Ramdisk from losing its contents. As when you power off everything you loaded would be gone.
Next when you say a maxed out system do you mean it physically or just the GS/OS? As you can probably exceed the 4meg with all the extras added to the GS/OS. Rsounds can take up a lot of room.
As far as speed goes the RamFast is faster booting than Apples cards. But only in HDs below 500meg as they get bigger the advantage in speed goes away.

gid...@sasktel.net

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May 10, 2013, 10:03:17 AM5/10/13
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If you are just doing it for testing purposes, the Ram charger is not necessary. Just copy the boot files to the Ram drive. Which consist of Prodos, System folder and icons folder, from your SCSI drive.

To make things simple, create a folder called "Ram disk" on your SCSI hard drive. Copy the Prodos file, System folder and icons folder to the newly created "Ram disk" folder. Verify the "Ram disk" folder will fit on the Ram drive. Remove unneeded files from that folder until it fits on the Ram drive.
Now you can just select those three files (Prodos, System folder and icons folder) and drag them to copy to the Ram drive. This does require that you boot from your SCSI when you first start up your computer. But after that, system resets will boot from the Ram drive.

Set up your IIGS control panel to boot from slot #5. Before shutting off the computer, you will have to return the boot slot to the slot the SCSI drive is in.

And lastly, press control-Open apple-reset, to boot from the Ram drive.

gid...@sasktel.net

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May 10, 2013, 10:05:21 AM5/10/13
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Correction: Set up your IIGS control panel to boot from the Ram drive.

Rommel Junta

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May 14, 2013, 7:16:13 AM5/14/13
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Thanks for the replies.

Taking note of all suggestions I played around with it more. Flashboot is a
nice program but only outputs image disks to 5.25 or 3.5, no links to hd
drive. If it did have this, it would make things so much easier. Anyhow,
with Flashboot and creating a ramdisk image of a bare bones system 6.0.1, I
still needed two 3.5 diskettes, and upon bootup (power down/power up) to
boot from ramdisk it had to load up the image disks from the 3.5 disks which
took 2 mins to do then ultimately ran system 6.0.1 from ramdisk (the speed
from ramdisk blows away the access speed of the hd drive btw).
Unfortunately, with the image disk created by flashboot, it cannot be copied
to a hd root directory (coded and cannot be 'cataloged'). Anybody know of
any 'newer' software that can use the ram as ramdisk and store the loading
files on a hard drive?

gid...@sasktel.net

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May 14, 2013, 9:06:09 AM5/14/13
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> Anybody know of
> any 'newer' software that can use the ram as ramdisk and store the loading
> files on a hard drive?


I think you meant that the other way around? You would like to store the loading files on the Ram disk?

There are a couple of programs in Nibble that might help. RAMSAVE saves the the contents of the Ram disk to a file on your hard drive, and RAMLOAD copies the file back to the Ram disk, restoring the directory structure. This is way faster than copying file by file.

You will have to boot into Prodos 8 to do this though.



Antoine Vignau

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May 14, 2013, 12:38:41 PM5/14/13
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Or use MountIt with a Prodos disk image file. It has the ability to update the contents of the disk image,

Antoine

Payton Byrd

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May 14, 2013, 12:51:43 PM5/14/13
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It seems to me that a RAM card that utilizes FLASH RAM would be a great modern product that would really help when using a RAM DISK. The FLASH would shadow system RAM and be written only when writes happen to the RAM DISK, not for general purpose usage of the RAM.

osgeld

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May 14, 2013, 7:43:35 PM5/14/13
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On Tuesday, May 14, 2013 11:51:43 AM UTC-5, Payton Byrd wrote:
> It seems to me that a RAM card that utilizes FLASH RAM would be a great modern product that would really help when using a RAM DISK. The FLASH would shadow system RAM and be written only when writes happen to the RAM DISK, not for general purpose usage of the RAM.

TI's FRAM would be a good candidate here, writes almost as fast as modern sram, can act as sram, but is non volatile, and they claim it has a almost infinite amount of write cycles (and its not too expensive either)
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