[Coco] Rainbow on disk RAID

[Stephen H. Fischer]

Hi, 

The problem is that most disks have been converted to .dsk a very long time ago and the physical disk has not been kept. Having two at this point in time cannot be counted on.

I am in the collection and preparing for the Internet Archive process and other places that have some ROTROD files.

I do not have the time to even check if March 1984 actually has the March 1984 files. File readability is not being done also.

I can keep notes on issues reported for various problems. I have a bingo card that can cleaned of data and used.

SHF
 
----- Original Message ----- 
From: "Melanie and John Mark Mobley" <johnmarkmelanie at gmail.com>
To: <coco at maltedmedia.com>
Sent: Tuesday, February 17, 2015 11:36 AM
Subject: [Coco] Rainbow on disk RAID


> Key
> RoD (Rainbow on Disk)
> RADE (Redundant Array of Independent disks)
> 
> Error recover of RoD.
> 
> RoD RADE => If we had 3 copies of each disk then we could select the sectors
> that match 2 out of 3 or 3 out of 3 and recover any errors.
> If 2 out of 3 sectors match then use one of the  matching sectors.
> 
> Then we can recover from disk errors.  There is hope that we can preserve
> this information even if the disk are starting to fail, but we need to act
> soon.
> 
> John Mark Mobley
> 
> 
> 
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