On 9/23/19 4:39 PM, ToddAndMargo via users wrote:
On 9/23/19 12:45 AM, Samuel Sieb wrote:
On 9/22/19 11:33 PM, ToddAndMargo via users wrote:
Digging through my history (which I did not think I still had):
# dd status=progress bs=4096 if=/dev/sdb | gzip -v > DeadStick.FC30_$(date +%Y-%m-%d).dd.gz
This is a 64 GB stick. It compressed down to 4 GB, which made senses most of the stick is zeros
# gunzip --to-stdout DeadStick.FC30_2019-09-06.dd.gz | dd status=progress bs=4096 of=/dev/sdb
If those are the exact commands you used then the one you wrote to should be identical. What is the problem? If the stick you write to is not the exact same one as the one you read from, the size might not be exactly the same which could cause a problem. You would need to compare the output from dd in both cases.
The stick is a dual Legacy, EUFI dual boot install of Fedora 30, x64.
On boot, the new stick recognized EUFI boot, gave me a choice of kernels, then dropped to the emergency prompt.
When I redid it with only a dd and no gzip, joy,
Me things I got everything back, but not in the right physical locations.
Simple test. But no issues here
# parted /dev/sdg GNU Parted 3.2 Using /dev/sdg Welcome to GNU Parted! Type 'help' to view a list of commands. (parted) print Model: JetFlash Transcend 8GB (scsi) Disk /dev/sdg: 8032MB Sector size (logical/physical): 512B/512B Partition Table: msdos Disk Flags:
Number Start End Size Type File system Flags 1 1049kB 8032MB 8031MB primary ext4
(parted)
# mount /dev/sdg1 /mnt # ls /mnt lost+found # touch /mnt/x # umount /mnt
# dd status=progress bs=4096 if=/dev/sdg | gzip -v > DeadStick.FC30_$(date +%Y-%m-%d).dd.gz
# ll DeadStick.FC30_2019-09-23.dd.gz -rw-r--r--. 1 root root 24337880 Sep 23 18:37 DeadStick.FC30_2019-09-23.dd.gz
# parted /dev/sdg GNU Parted 3.2 Using /dev/sdg Welcome to GNU Parted! Type 'help' to view a list of commands. (parted) rm 1
(parted) print Model: JetFlash Transcend 8GB (scsi) Disk /dev/sdg: 8032MB Sector size (logical/physical): 512B/512B Partition Table: msdos Disk Flags:
Number Start End Size Type File system Flags
(parted) quit Information: You may need to update /etc/fstab.
# mount /dev/sdg1 /mnt mount: /mnt: special device /dev/sdg1 does not exist.
# gunzip -c DeadStick.FC30_2019-09-23.dd.gz | dd status=progress bs=4096 of=/dev/sdg
# mount /dev/sdg1 /mnt # ls /mnt lost+found x