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26 of 29 found the following review helpful:
A brief comment Jan 29, 2008
By magellan
I like the promise of Blue Ray, but as an old computer tech who's fought a lot of bleeding edge tech battles over the years, I have to warn you that the reliability just isn't there yet for the write-once disks. Although I haven't had any problems, I've heard of a number of ones relating to the write-once disks, which then become expensive "coasters." Instead, for now at least, choose the rewritable disks, which, although more expensive, you'll avoid costly failed disks until the write-once ones are more reliable.
I don't know what the technical reason for this is; however, Blu Ray uses a different dye technology from standard DVDs. Instead of the super-cyanine dye used by companies like Taiyo Yuden, the phthalocyanine dye used by Mitsu Advanced Media and Mitsubishi-Kodak's media, and the metal azo stabilized dye used by Verbatim, Blu Ray uses a phase change technology, in addition to the shorter wavelength laser. In some ways it's not so different from the rewritable DVD technology, or DVD-RW, which uses the phase change in an exotic alloy, Ag-In-Sb-Te alloy, except for the fact of course that the dye is an organic optical dye rather than a metal alloy.
These problems remind me of similar problems I had with ordinary CDs back in the days of early CD writer and DVD writer software. Back then, I wasted many CD and DVD disks until the software became less buggy. Still, I like the Blue Ray disks since they are cheaper for the same amount of storage than a comparable size mini cruzer, which in fact aren't even available at this size. The 15 gig mini cruzer that I bought was 100 bucks. The Blue Ray disk give you two to four times the capacity for significantly less. Unfortunately, compared to a mini cruzer RAM module, they are slow. Copying a 4 gig mini cruzer is around 5 minutes on my system. A 25 gig Blue Ray is over an hour, so be prepared for some long burn times. But overall, a big improvement in capacity over the previous standard.
16 of 17 found the following review helpful:
 Turtle Fast. Easy to make into an Expensive Coaster Jan 23, 2008
By Z1
About the best 50GB BD disk you can buy, but you would be much better off spending more for the rewritable version. Most of the BD burners for sale are bundled with CyberLink software which is very buggy. My first attempt with a Panasonic disk, the software crashed the computer and I got a $45.00 coaster (tax write-off). 2nd attempt with a Sony disk worked well.
Need patience for this backup method. Around 1 ½ hours to burn data even with a Gen 2 BD burner.
9 of 10 found the following review helpful:
Reliable archiving to Blu-ray Mar 28, 2008
By A. Lefebvre
I have used the dual layer media only once so far but it worked well enough to store video data up to 47 gigs or so. The media claims 50 gigs but really you can't get 50 gigs on there. Same with the 25 gig, single layer media, you can only burn 23 gigs or so. I wish Sony would produce a 4x record speed version (like Panasonic has) and of course we are all waiting for this media to drop in price now that Blu-ray has won the HD media war. Tip: Be sure you understand what version of UDF you are working with prior to burning data to the disc. Some UDF only read on Vista software. I wasted two 25 gig discs learning this.
11 of 13 found the following review helpful:
 Damning with Faint Praise: Expensive Turtle Coasters Revisited Mar 04, 2008
By S. Lerner
"36BitsAliveandWellin"
Another lifer sliding down the bleeding edge. I agree--spend another $10 to get the rewritable version.
After finally getting the settings on my Mac right (1x (ugh!!), buffer underrun protection), I managed to
successfully write 4 discs: 2 had verification failures on reread, 1 hung during verification, and 1 wrote/verified
successfully. I was thrilled--the first three attempts before calling the vendor re above cretinous parameter
settings are now...coasters. However, all in all, it's better than the 25 CDs I'd have to burn, but without charming multi-volume capability. I'm more or less happy, I guess, and think that I may be able to
read the 4 I have, if I ever need to, maybe. Hoping this gets cheaper, easier, faster soon.
Reliable Apr 30, 2012
By Warren Chu
One of my Sony BD-R DL discs is almost 4-years old and it still reads with no problems. In contrast, all of my Memorex BD-R discs have become unreadable including some less than 18 months old. It seems clear that Sony discs are superior and worth the extra cost.
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