On 9/23/19 5:17 AM, Ed Greshko wrote:
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
You need to complicate up your partition structure and
try it again.
# parted /dev/sdb
GNU Parted 3.2
Using /dev/sdb
Welcome to GNU Parted! Type 'help' to view a list of commands.
(parted) print
Model: Samsung Type-C (scsi)
Disk /dev/sdb: 64.2GB
Sector size (logical/physical): 512B/512B
Partition Table: gpt
Disk Flags:
Number Start End Size File system Name Flags
1 1049kB 2097kB 1049kB
bios_grub
2 2097kB 212MB 210MB fat16 EFI System Partition
boot, esp
3 212MB 1286MB 1074MB ext4
4 1286MB 61.9GB 60.7GB ext4
5 61.9GB 64.2GB 2220MB linux-swap(v1) swap
(parted) quit
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