There are many different flavors of RAID. RAID 0, which I was referring
too, is pretty standard in video setups. You have two identical drives
side by side, you fill the write buffer on one drive until it squeals,
then, in the time that normally the computer would stop writing because
the first disc can't accept any more data, the other second drive can
start writing. So it speeds up disc writes considerably by alternating
writes between the two drives. The downside is that it is pretty hard on
the hard drives mechanically, so they tend to fail sooner. And because
of the random data layout on the drives, if you lose one drive, you lose
everything.
Other types of RAID provide varying degrees of data integrity
irrespective of hard drive health They are used mostly in server type
machines because they are a pain to deal with on the desktop, good
backups are nearly as good unless you can't afford any downtime.
Written from the trenches...
Stephen
On 6/14/11 6:03 PM, S T wrote:
I honestly never understood the purpose behind a RAID setup. Maybe I
dn't understand it, but it seems to me if you have 4 1 TB drives set up
in a RAID you just have 1TB duplicated 4 times. Makes losing one or two
drives meaningless in this case, and that's the point. But you're
talking about 1 TB, not 4.
Then again, 1TB is a LOT of space. but the principle's the same.
Unless I'm missing the boat completely.
On Tue, Jun 14, 2011 at 9:44 PM, Stephen E. Bodnar <[email protected]
<mailto:[email protected]>> wrote:
On 6/14/11 5:33 PM, Kris Tilford wrote:
On Jun 14, 2011, at 8:06 PM, Stephen E. Bodnar wrote:
The 2-SATA PCI card is worth it, it will speed up the system
quite a
bit. At least it did on my old G4!
[snip]
It also makes quite a bit of difference how they are setup and how they
are used. If they are RAID 0, of course they will be faster, at risk of
data loss. Since he was talking about video, that is a very intensive
disc application so the test would have to be with massive read/writes
as you would do in video editing.
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