Duplicating Rasberry Pi Images
|August 17th, 2022|
Because I wanted some insurance against failures at gigs, both boxes are configured identically, and decide which role to take on based on what inputs they receive. This means that if one of them fails I can use the other, for either bass whistling or midi silliness depending on which I need more.
When Kingfisher played our first dance weekend a month ago, this did happen. I think the SD card on one of the boxes was corrupted by a bad shutdown. Since I have extra SD cards, I decided to make some SD card clones.
On my Mac this looked like:
$ diskutil list /dev/disk0 (internal): #: TYPE NAME SIZE IDENTIFIER 0: GUID_partition_scheme 500.3 GB disk0 1: Apple_APFS_ISC 524.3 MB disk0s1 2: Apple_APFS Container disk3 494.4 GB disk0s2 3: Apple_APFS_Recovery 5.4 GB disk0s3 /dev/disk3 (synthesized): #: TYPE NAME SIZE IDENTIFIER 0: APFS Container Scheme - +494.4 GB disk3 Physical Store disk0s2 1: APFS Volume Macintosh HD 15.4 GB disk3s1 2: APFS Snapshot com.apple.os.update-... 15.4 GB disk3s1s1 3: APFS Volume Preboot 446.8 MB disk3s2 4: APFS Volume Recovery 822.2 MB disk3s3 5: APFS Volume Data 251.1 GB disk3s5 6: APFS Volume VM 1.1 GB disk3s6 /dev/disk4 (internal, physical): #: TYPE NAME SIZE IDENTIFIER 0: FDisk_partition_scheme *31.3 GB disk4 1: Windows_FAT_32 boot 268.4 MB disk4s1 2: Linux 31.0 GB disk4s2
Seems like the SD card is /dev/disk4.
$ diskutil unmountDisk /dev/disk4 Unmount of all volumes on disk4 was successfulBest to unmount it before reading from it, and required before writing to it.
I made an image:
$ time sudo dd if=/dev/disk4 of=~/Desktop/rpi.dmg 61069312+0 records in 61069312+0 records out 31267487744 bytes transferred in 807.574215 secs (38717789 bytes/sec) real 13m27.618s user 0m12.921s sys 4m47.337s
Swap the SD card for another,
diskutil unmountDisk /dev/disk4 again, then write the image:
time sudo dd if=~/Desktop/rpi.dmg of=/dev/disk4 61069312+0 records in 61069312+0 records out 31267487744 bytes transferred in 4960.289760 secs (6303561 bytes/sec) real 82m40.324s user 0m16.477s sys 3m51.574s
Pop the card out, put it in the Raspberry Pi, and it works!
I compressed the image to save for later:
$ cat ~/Desktop/rpi.dmg | gzip > ~/Desktop/rpi.dmg.gz $ du -hs ~/Desktop/rpi.dmg* 29G /Users/jeffkaufman/Desktop/rpi.dmg 1.0G /Users/jeffkaufman/Desktop/rpi.dmg.gz
Looking forward to playing Spark in the Dark a week from Saturday with a little more tech redundancy!
Comment via: facebook, lesswrong