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Jackie Lin
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PostPosted: Fri Mar 15, 2019 5:09 am    Post subject: move root file system from hdd to ssd Reply with quote

hello, there!
I want to buy an SSD。I have installed gentoo root directory on hdd.
how can I move the root file system from hdd to ssd without reinstalling gentoo on ssd again?
thanks a lot!
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e3k
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PostPosted: Fri Mar 15, 2019 9:45 am    Post subject: Re: move root file system from hdd to ssd Reply with quote

Jackie Lin wrote:
hello, there!
I want to buy an SSD。I have installed gentoo root directory on hdd.
how can I move the root file system from hdd to ssd without reinstalling gentoo on ssd again?
thanks a lot!

1. boot from systemrescuecd
2. mount both drives (you have to create the root partition on the ssd first)
3. cp -a /dev/sdaX /dev/sdbX (where a is the hdd and b is the ssd)

you still will need the hdd for booting as moving the root partition is not enough. probably you want also to copy the /boot partition and install the bootloader on the SSD.
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vasettoo
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PostPosted: Fri Mar 15, 2019 3:40 pm    Post subject: Reply with quote

I successfully moved my whole gentoo installation from a smaller SSD to a bigger one on UEFI and gpt partition table with Clonezilla installed on bootable USB flash stick - cached into RAM after booting the clonezilla drive. Needed only to resize volume filesystems on the new drive as they are LVM.
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ppurka
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PostPosted: Fri Mar 15, 2019 4:27 pm    Post subject: Reply with quote

I think what @e3k wrote is mostly correct. For the 3rd step, I would prefer rsync over cp: rsync -avh /mnt/sdaX/ /mnt/sdbX (note the trailing / in the source directory)
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Irre
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PostPosted: Fri Mar 15, 2019 8:47 pm    Post subject: Reply with quote

And correct entries like:
Code:
UUID=6bce835a-0910-434e-a610-576cc0c2fa54  /  ext4      noatime         0 1
in /etc/fstab or boot loader.
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Jaglover
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PostPosted: Fri Mar 15, 2019 8:56 pm    Post subject: Reply with quote

ppurka wrote:
I think what @e3k wrote is mostly correct. For the 3rd step, I would prefer rsync over cp: rsync -avh /mnt/sdaX/ /mnt/sdbX (note the trailing / in the source directory)


What 3ek wrote is 100% correct. Everybody can check out 'man cp' and the -a option.
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Hu
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PostPosted: Sat Mar 16, 2019 1:14 am    Post subject: Reply with quote

ppurka wrote:
For the 3rd step, I would prefer rsync over cp: rsync -avh /mnt/sdaX/ /mnt/sdbX (note the trailing / in the source directory)
I like rsync, but that invocation is not correct. You failed to preserve ACLs, hard links, and xattrs.
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Jackie Lin
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PostPosted: Sat Mar 16, 2019 4:45 am    Post subject: Re: move root file system from hdd to ssd Reply with quote

e3k wrote:
Jackie Lin wrote:
hello, there!
I want to buy an SSD。I have installed gentoo root directory on hdd.
how can I move the root file system from hdd to ssd without reinstalling gentoo on ssd again?
thanks a lot!

1. boot from systemrescuecd
2. mount both drives (you have to create the root partition on the ssd first)
3. cp -a /dev/sdaX /dev/sdbX (where a is the hdd and b is the ssd)

you still will need the hdd for booting as moving the root partition is not enough. probably you want also to copy the /boot partition and install the bootloader on the SSD.


Thanks, I think I have got the idea. I will have a try.
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ppurka
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PostPosted: Sat Mar 16, 2019 7:40 am    Post subject: Reply with quote

Jaglover wrote:
ppurka wrote:
I think what @e3k wrote is mostly correct. For the 3rd step, I would prefer rsync over cp: rsync -avh /mnt/sdaX/ /mnt/sdbX (note the trailing / in the source directory)


What 3ek wrote is 100% correct. Everybody can check out 'man cp' and the -a option.
Thanks! Something for me to learn as well.
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