Jeff In Ocala
Active member
is there any hope in recovering the clip i was recording when I ejected the p2 card during recording trying to do a hot swap of p2 cards?
repair clip after accidentally ejecting p2 card during recording
- Thread starter Jeff In Ocala
- Start date
Barry_Green
Moderator
Yes, in fact it's pretty much guaranteed that you'll be able to recover that clip. Just put the card in the camera, select that clip (it'll have a "X" icon on it) and choose the "repair clip" option.
P2 is designed to withstand exactly that kind of situation. It automatically closes out the file system every two seconds, so in the worst case you should lose (at most) the last two seconds of footage, but you should be able to recover everything else just fine.
Good luck!
P2 is designed to withstand exactly that kind of situation. It automatically closes out the file system every two seconds, so in the worst case you should lose (at most) the last two seconds of footage, but you should be able to recover everything else just fine.
Good luck!
Jeff In Ocala
Active member
worked like a charm Barry, Thanks saved me a sleepless night!!
Barry_Green
Moderator
There's lots more in there too. There's a microcomputer inside each P2 card, which does several things:
1) it RAIDs the memory together to provide higher transfer rates. The original cards were rated at 640mbps, the newer cards are 800mbps, and the newest "E" series cards will actually top out at 1200mbps (or 1.2 gbps). That's pretty much fast enough to support uncompressed HD-SDI output! Faster, cheaper, and more rugged than ExpressCard-based SxS.
2) It manages and closes out the file system every two seconds, to prevent catastrophic data loss in the event of your battery dying, or someone kicking out the power cord, or a blackout, or (as in Jeff's case) untimely ejecting of the cards.
3) It does write verification on every bit of data that gets written to the card. There's internal verification that means that every time you send a byte of data to the card, the processor writes it out, then reads it back in to compare and make sure that it's written exactly correctly. If the readout doesn't match what's written, it tries again (and again, up to six times). If it can't succesfully write the data after six times, it'll mark that cell as "bad" and move on to the next cell. That way you're absolutely guaranteed of rock-solid reliabe data writing.
4) It does automatic load-leveling or wear-leveling. The system automatically spreads out all data writing across the entire surface of the card, which keeps any particular cells from being repeatedly written. That spreads out the wear evenly, ensuring that the card will last the longest possible time.
There's a lot more going on under the hood than just a simple memory card! People ask why these things cost more than CompactFlash, well, there's lots of reasons why. (and, oddly enough, a 16GB P2 "E" card even costs LESS than Red's 16GB CompactFlash card, so suddenly they don't look all that expensive anymore either!)
1) it RAIDs the memory together to provide higher transfer rates. The original cards were rated at 640mbps, the newer cards are 800mbps, and the newest "E" series cards will actually top out at 1200mbps (or 1.2 gbps). That's pretty much fast enough to support uncompressed HD-SDI output! Faster, cheaper, and more rugged than ExpressCard-based SxS.
2) It manages and closes out the file system every two seconds, to prevent catastrophic data loss in the event of your battery dying, or someone kicking out the power cord, or a blackout, or (as in Jeff's case) untimely ejecting of the cards.
3) It does write verification on every bit of data that gets written to the card. There's internal verification that means that every time you send a byte of data to the card, the processor writes it out, then reads it back in to compare and make sure that it's written exactly correctly. If the readout doesn't match what's written, it tries again (and again, up to six times). If it can't succesfully write the data after six times, it'll mark that cell as "bad" and move on to the next cell. That way you're absolutely guaranteed of rock-solid reliabe data writing.
4) It does automatic load-leveling or wear-leveling. The system automatically spreads out all data writing across the entire surface of the card, which keeps any particular cells from being repeatedly written. That spreads out the wear evenly, ensuring that the card will last the longest possible time.
There's a lot more going on under the hood than just a simple memory card! People ask why these things cost more than CompactFlash, well, there's lots of reasons why. (and, oddly enough, a 16GB P2 "E" card even costs LESS than Red's 16GB CompactFlash card, so suddenly they don't look all that expensive anymore either!)
