I just use the Unix utility "dd". For example
*dd if=/dev/sdc of=/dev/sdd bs=8M* The disks should not be in use. That is, they should not be mounted. -tk On Tue, May 5, 2020 at 12:59 PM Xant <armando.este...@gmail.com> wrote: > > My experience with rPI SD cards. The following refers to Windows/PC with a > SD card slot or with a USB SD card reader/writer. > > *1) Backup, Image or Cloning *- to equal or larger SD card > > *Win32DiskImager* - https://sourceforge.net/projects/win32diskimager/ > > Win32DiskImager is the "to-go" option for rPI SD cards disk imaging, > backup or cloning. It creates a 'perfect' image as it copies 'bit-by-bit' > data clusters to an IMG file. Thus, it creates a file as big as the Card > size itself as it even 'copies empty cluster data'. > > But bigger, not always better. > As SD storage size prices keeps following, its easy to get tempted to > slide a very large SD card into rPI, and I took this bait when upgrading to > rPI-4. I placed a 64Gb SD Card, but turned out that only used a small > fraction of the card storage (~7%, for WeeWx, MQTT, wx-database, > Belchertown skin, InfluxDB, Grafana, etc). > On the other side, it takes long to Backup and creates very large IMG > files. > > Thus, Win32DiskImager can transfer IMG to same or larger SD card, where > the extra space would be "unallocated" and needs to be expanded > (raspi-config). > > > *2) Transfer to Smaller SD Card* > > Transfer to a Smaller SD Card is possible and there are different > approaches pending OS, Software or more than 1 SD card slot. > The easiest (and free) way I found was through '*Paragon Backup & > Recovery*' - https://www.paragon-software.com/us/free/br-free/# > Paragon creates a 'recovery-point file' that saves only the actual data > from SD card that can be transferred back to "any size" SD card, > same/smaller/larger (data usage considered). > > This worked perfect in my case, and now have a better size-fit SD card > running on rPI=4 for WeeWX. > > Xant > > -- > You received this message because you are subscribed to the Google Groups > "weewx-user" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to weewx-user+unsubscr...@googlegroups.com. > To view this discussion on the web visit > https://groups.google.com/d/msgid/weewx-user/71ea00fc-de53-43fa-89e4-90dd7b101611%40googlegroups.com > <https://groups.google.com/d/msgid/weewx-user/71ea00fc-de53-43fa-89e4-90dd7b101611%40googlegroups.com?utm_medium=email&utm_source=footer> > . > -- You received this message because you are subscribed to the Google Groups "weewx-user" group. To unsubscribe from this group and stop receiving emails from it, send an email to weewx-user+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/weewx-user/CAPq0zEAJ3sVAu8X5BN1AnQJSt7qsCXrsbjLi1aeQf_f93gevkg%40mail.gmail.com.
