FS7: XQD Card Cycle Counter?
- Thread starter TMHiggins
- Start date
cyvideo
Veteran
Regardless of card technology used you MUST have error correction for NAND flashes to work. A considerably big chunk of the total amount of data fitting into a NAND flash is used for this very purpose. You also need wear leveling if the cells are to support around 1000 erasures (i.e. can be overwritten like 1000 times) Even read operations can cause permanent bit-flips, you need to move blocks around where the error correction detects too problems areas, and keep an index of all this so the "outside" view of all the data stays the same. XQD cards use advanced integrity algorithms to ensure their performance. Additionally under durability testing Sony's XQD cards have been subjected to 10,000 plus insertion and removal cycles without failure.
With some five years of XQD card use on pretty heavy documentary shooting I have an average of about 133 hours per card. I keep a log on card usage and rotation. Not that every card got filled to its max, all mine are 128GB, the bulk of the work has been HD so around about 130+ insert and extractions per card so well short of the generally expected 1000 times overwrite expectancy. So far I have almost complete faith in the cards. That being said on mission critical expensive overseas jobs that have little chance of a re-shoot with political leaders and military officials, history docos, I backup record to an Atomos. I would be more than happy to use these cards in an FX9 should I make that jump.
Sony's POV
Sony Quote:
"Safe and reliable media
The XQD cards are tough enough for extreme conditions and on-location filming. They also feature Sony’s intelligent controllers possessing wear levelling, error correction
code and data refresh functions.
Another Sony Quote:
"XQD Memory Cards are designed with recessed contact pins which protect them from damage, dust or electrostatic shock. With the compatible devices also designed to protect contact pins and avoid inserting card in the wrong direction, it provides a more reliable use even in harsh environments. Furthermore, Sony’s XQD cards improve durability with increased shell strength thanks to its unique technology.
Sony’s XQD memory cards are shockproof, magnet proof, anti-static and resistant to breakage, and offer full performance even in extreme temperatures, under exposure to intense UV light and airport X-rays machines. Designed for prolonged professional use, Sony XQD cards are tested for dependable storage, wherever you need to shoot."
So far I have no reason to dispute Sony's claims. Fingers Crossed
Chris Young
With some five years of XQD card use on pretty heavy documentary shooting I have an average of about 133 hours per card. I keep a log on card usage and rotation. Not that every card got filled to its max, all mine are 128GB, the bulk of the work has been HD so around about 130+ insert and extractions per card so well short of the generally expected 1000 times overwrite expectancy. So far I have almost complete faith in the cards. That being said on mission critical expensive overseas jobs that have little chance of a re-shoot with political leaders and military officials, history docos, I backup record to an Atomos. I would be more than happy to use these cards in an FX9 should I make that jump.
Sony's POV
Sony Quote:
"Safe and reliable media
The XQD cards are tough enough for extreme conditions and on-location filming. They also feature Sony’s intelligent controllers possessing wear levelling, error correction
code and data refresh functions.
Another Sony Quote:
"XQD Memory Cards are designed with recessed contact pins which protect them from damage, dust or electrostatic shock. With the compatible devices also designed to protect contact pins and avoid inserting card in the wrong direction, it provides a more reliable use even in harsh environments. Furthermore, Sony’s XQD cards improve durability with increased shell strength thanks to its unique technology.
Sony’s XQD memory cards are shockproof, magnet proof, anti-static and resistant to breakage, and offer full performance even in extreme temperatures, under exposure to intense UV light and airport X-rays machines. Designed for prolonged professional use, Sony XQD cards are tested for dependable storage, wherever you need to shoot."
So far I have no reason to dispute Sony's claims. Fingers Crossed
Chris Young