Oh, I never meant to suggest you were. There is a lot of misinformation out
there about what RAID0 is good for. The truth is that there are only a very
select few situations where it is useful...raw video capture (where data
writes need to be, say, 50MB/s or greater at all times...like capturing
uncompressed content or HD content), very rapid processing of video (not
encoding, encoding is almost never disk I/O bound, but muxing or some other
similar function). Even in that situation, it would be better to have to
independent disks: read from one and write to the other. However, utilizing
two RAID0 arrays in that case could improve speed significantly.
You see a lot of people out there running RAID0 on a boot volume. Most of
these people don't realize that the impact on boot performance can in fact
be -negative-, and the risk of data loss goes up tremendously.
Greg
----- Original Message -----
From: "James Maki" <[EMAIL PROTECTED]>
To: "'The Hardware List'" <[email protected]>
Sent: Thursday, August 11, 2005 10:31 PM
Subject: RE: [H] Hard drive speeds
Greg,
I always enjoy your comments as you cut through much of the BS. Thanks for
the comments and suggestions. When I switched from a single raptor to
RAID0,
it "felt" faster, but maybe because I was anticipating increased speed.
Overall, I am happy with the system's response, and was just looking for
some real world comparisons of the different hard drives and adapters.
Reading reviews and manufacturers claims only goes so far.
BTW, I don't think I'm retarded, just misinformed :(
Jim
-----Original Message-----
From: Greg Sevart
Overall comments:
- Same disk I/O always blows--that's why RAID0 is retarded
except for a VERY
SELECT FEW situations.
- Access time is FAR more important than sequential
throughput on a boot
volume--that is why the Raptors are so good
- The T7K250 (I have one also) has NCQ whereas the Raptor does not
- The T7K250 also has a huge advantage in aerial density
- RAID0 often slows down a boot volume. Why? As array size
grows, seeks get
slower, and seek time is the most important thing on a boot volume.
Greg
