6 1/2 hours! WOW. I don't know what model card reader and SD card, computer hardware, Windows operating system version, etc. that you have, but that is a ridiculous amount of time. My Win32DiskImager image backups run at an average 17 MB/s (according to the program) and take typically 15 minutes to back up my 16GB SD card to an image on an external USB hard drive. I have also verified that the backups are valid by doing a restore to a second SD card.timmoore46 wrote:After 6 1/2 hours the 16GB SD was imaged ok !
As far as size variance none really, as sectors are marked bad their size will change, just because there are some bad sectors when they are manufactured doesn't mean the card wont be sold, I think they have a minimum size spec. That 4 gig card you just bought may really be an 8gig that didn't meet standards. The same cards off the same line could potentially all have different sizestimmoore46 wrote:I used identical SD cards :-
Elite Pro 16GB class 10.
So which SD card manufacturers do work with the Win32DiscImager software, without this joke ?
Win32DiskImager always copy the full SD card, but this is not necessary.After 6 1/2 hours the 16GB SD was imaged ok !
So I poped and blank in and attempted to write the img to it.......
Message came back:-
Needed 32,433,360 sectors / Available 31,537,152 sectors / Hmmmm....
Code: Select all
Code: Select all
dd.exe if=\\?\Device\Harddisk1\SR0 of=<YourFileName>.img bs=1M count=<SizeInMB> --size --progress --> dd.exe if=\\?\Device\Harddisk1\SR0 of=img8g_02_yymmdd.img bs=1M count=7500 --size --progress
Presumably, your external hard drive is formatted with FAT, this is limiting the max. filesize to about 4 GB.timmoore46 wrote: Tried to move the img file from the Vista laptop onto a WD 320GB portable drive (3 years old +) and it moaned with 'file too big'. Anyone got one of these 'no power supply' type portable drives that can cope with 16GB drives ?