RAID drives and data loss--MacDV Digest #1798

[Ted Langdell]

I'd disagree with your contention about RAID and data security.  What you
say is only true if using "RAID 0 (zero), which is technically, NOT a true
"Redundant Array of Inexpensive Drives.

BUT... my recollection of why RAID was a benefit for data security and in
particular why it was pitched as a good thing in video editing (aside from
speed) was that it made it possible to recover for losing one of the drives
in the RAID array, since the data was spread out... say an eight bit word
was written to eight drives, one bit of the word per drive.

Loss of one of the drives wouldn't cripple recovering enough of the word to
keep going.

I did a Sherlock search for "RAID" and found this link to an explanation of
what "RAID" is, and how it works.

http://www.raidweb.com/whatis.html

There are multiple "RAID" methods explained.

Hope this is useful and clears up any misconceptions.

Ted.

> From: "Macintosh Digital Video List" <MacDV at lists.themacintoshguy.com>
> Date: Sat, 14 Dec 2002 01:08:26 -0800
> To: "Macintosh Digital Video List" <MacDV at lists.themacintoshguy.com>
> Subject: MacDV Digest #1798
> 
> ------------------------------
> 
> Date: Sat, 14 Dec 2002 00:23:31 -0500
> Subject: [MacDV] Re: Any advantages to RAID for DV?
> From: Gerhard Kuhn <suspice at hay.net>
> Message-Id: <2EF3009B-0F24-11D7-8AAD-000393984D16 at hay.net>
> 
> One more thought on this.  A raid set up actually makes for less secure
> data since the data is spread over multiple drives acting as one and if
> one goes south so does all the data on all the drives.