Tricky thing is most can only read a whole page at a time, and write a whole block at a time. but really inside a page there are many different ways the data is stored, and there is also Service data that keeps track of errors, etc. SANDISK CRUZER DRIVER ERROR WINDOWS 10 SOFTWARENAND flash use mostly Pages (can be sizes like 2112, 8640, 9216), Blocks, which are a set of Pages, Banks which are like a single chip, where a device with 2 banks is kind of like 2 seperate NAND chips joined together to help with speed and capacity.ġ page of data may be shown in some software as, say, 4 sectors. This is a handy number of 512 used by Hard Drives. Most sectors are in second half of the drive, hopefully I did not get a faked drive. Most sectors are in second half of the drive, hopefully I did not get a faked wrote:Īll listed sectors can be devided by 8 without a rest, so maybe one chip failed. Yes, it takes 6 hours to read the drive on a other system, using an USB 3.0 Port.Īll listed sectors can be devided by 8 without a rest, so maybe one chip failed. Nov 3 06:00:49 donald kernel: end_request: I/O error, dev sdh, sector 27920568 Nov 2 23:41:33 xxx kernel: end_request: I/O error, dev sdh, sector 248344 Nov 2 23:41:31 xxx kernel: end_request: I/O error, dev sdh, sector 248288 ![]() Linux has logged all the 13797 defect sectors during the dd command SANDISK CRUZER DRIVER ERROR WINDOWS 10 FREEI managed to get the data back using dd and copy the image on a other free drive. After starting the real usage of the machine, the next day the drive swiched to “read-only-mode”. The drive was divided in partitons and ext4 was used as file-system. I used a “SanDisk Ultra USB 3.0” with 32 GB size, two month old, for booting linux and as root-disk. > Interesting scenario as to how it occurred. SANDISK CRUZER DRIVER ERROR WINDOWS 10 PCIf you want to see how some devices are made and in what conditions(such as placing components by hand with a chopstick! Google Bunnie Haung factory USB how made or something like that.Ī USB should be a transport device, there should NEVER be files located on a USB that does not exist also on a PC or general file wrote: If you want to see how many devices are made, google for USB drives made at Lexar Factory. So there could be many improvements made to the newer replacements, and simply saying never buy sandisk is Ludicrous. In some rare cases there may be a glitch in the system or an OS error that a bit of fiddling can fix, but most cases you should copy your files off and return the device, or simply throw it out and get another one.īTW, by the time you go to buy a device in the shops, Sandisk could have manufactured it months ago. As Sandisk do not give their factory tools out to the public, there is nothing and end user can do generally. If there is a bug in the software on the controller chip, or in one of the hard coded circuits, or an electrical problem such as a capacitor dies and does not give the NAND chip or controller a stable or correct voltage, then it stands to mention that the device can be stuck in write protect mode. One of the Pins on a NAND Flash Chip is WP, or Write Protect. These hard coded circuits can never be changed. The Controller Chip has Firmware, and also Hard Coded circuits to do error checking and data encoding. These pins are soldered to the Printed Circuit Board and connected to the USB controller chip. If the devices are covered in plastic, we call them Monoliths, then they still do but the bonding wires are hidden. NAND flash chips used in USB drives, memory cards etc generally have 48 pins.
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