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Old March 11th, 2004, 11:54 AM   #76
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Sorry to take so long to respond.

Vincent, average access time isn't the issue. Average access time is a measure of how fast the disk system can respond once it is given the address of the desired data. Once found, the performance characteristic that matters is transfer speed and, ultimately, throughput. For video, where streaming a large amount of data is a typical practice, the NetCell RAID XL (3) approach yields much better throughput.

The article acknowledges the limitation of the NetCell approach, which is the total number of IO operations per second. NetCell does poorly in this respect. However, NetCell makes it clear that its best application is for larger files, like video, where overall throughput is more important than how many different accesses per second or per hour are possible. NetCell clearly states that XL is not suitable for server operations where lots of small files are being handled.

Rob, as for why to use RAID at all, my personal issue is safety. However, the price for safety would be too high if I had to contend with lower performance. When I started looking at RAID solutions I was taken by the fact that I could have maximum safety in RAID 1 (mirroring) but that RAID 1 generally performs less well. NetCell's diagrams (duplicated at THG) make this clear. For a 2-disk RAID 1 array, the data must be written once to each disk. For a 3-disk RAID XL array, half the data is written to one disk, half to the other, and parity to the third; all these operations happen in parallel. So just considering the streams going to the disk, the size of the stream is half the size of the stream going to RAID 1. XL delivers parallelism that RAID 1 doesn't have.

Use of space is more efficient, too. Consider using 200MB disks. In a 2-drive RAID 1 array the total storage is 200MB (100% overhead). In a 3-drive RAID XL array the total storage is 400MB (50%). In a 5-drive XL, it's 800MB (25%).

As for why safety is important, it's really a question of time. It takes a lot of time to capture video and a lot of time to render video. Loss of those files means spending all that time over again. Because the sheer volume of data is so great with video, the lost time can be significant. I'm interested in protecting my investment of time. It's not that I can't recover, it's that the hit to my time (in a one-man shop) is a major risk.

Will
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Old March 11th, 2004, 01:12 PM   #77
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New 400gb Hard Drive

http://www.xbitlabs.com/news/storage...310030245.html
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Old March 11th, 2004, 02:42 PM   #78
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I've been using a FW800 400Gb Lacie Big Disk for a couple of months now.
$449 from the Lacie website. So far this has been solid, BUT I've
had issues with their 160Gb Porsche and D2 drives.
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Old March 11th, 2004, 03:33 PM   #79
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I was wondering, is the Lacie drive one 400gb drive? or two 200gb HDs Raided together?
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Old March 12th, 2004, 12:22 PM   #80
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AFAIK there are two platters in the Lacie 400 big disk. To get 800 mbps they
are probably strip together, but I am not sure about that.
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Old March 14th, 2004, 01:55 PM   #81
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Blu-ray disk recording coming

http://www.eetimes.com/sys/news/OEG20040309S0029

"Matsushita showed a prototype of its Blu-ray DVD-RAM recorder on Tuesday (March 9) that uses a two-layer 50 Gbyte disk"

Wondering why they call it DVD in that article. Probably a mixup.
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Old March 14th, 2004, 02:36 PM   #82
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Official word from Hitachi about HD cameras?

HD is doing R&D on HD cameras and is looking to get into the market in a big way, starting with cameras.

Does anyone have any word on the specs of these cameras? Has anyone heard? I know about what they wan to do because they've approached people I know about sponsoring some shows, but I don't know any specifics.
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Old March 15th, 2004, 12:33 PM   #83
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I dont think that counts as news, but were all < including the moderators> so excited about HDV, so i think theyll let it slide.

Also these people you know who are potential sponsors might be in a position to beg details... atleast a release date?
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Old March 17th, 2004, 10:27 AM   #84
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Sony Intros Double Layer DVD Burners

SAN JOSE, Calif., (Mar. 17, 2004) -- Sony Electronics is adding two DVD+R Double Layer (DL) DVD drives to its family of Dual RW burners. The internal DRU-700A and external DRX-700UL drives mark Sony's entry into Double Layer recording.

full:
http://www.digitalproducer.com/2004/...6/e3jpa3wb.htm
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Old March 17th, 2004, 11:28 AM   #85
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Wow! And only $230 for an internal.

I don't understand the software bundle, though. I've the full Ahead Nero product (not SE), and I'm not aware of any ability that it has to author for double-sided disks. I wonder if this is a special version?
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Old March 17th, 2004, 11:51 AM   #86
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Will it work in a Mac?
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Old March 18th, 2004, 09:04 AM   #87
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Philips dual layer 8x DVD burner announced

http://www.anandtech.com/news/shownews.html?i=21731
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Old March 18th, 2004, 04:50 PM   #88
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New JVC 3 CCD HDV Camera

I'm just providing a link over to the HD10/HD1 page:

http://www.dvinfo.net/conf/showthrea...threadid=23142

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Old March 28th, 2004, 10:52 AM   #89
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And of course, we'll post more info here as well, as it becomes available.
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Old March 28th, 2004, 10:37 PM   #90
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Ya know, Chris, JVC wants to one-up Sony with a pre-NAB announcement, but the lack of photos and info leaves us dry. I can't believe none of us are speculating. Then again, HDV is old hat now, compared to last year, and Sony has info out via Cebit (is that right)?

C'mon, JVC, send us info and pix!

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