[Wylug-discuss] Up rating my filling system

[Chris Gretski]

If the current MBR disk is fully utilized the GPT conversion will be destructive, as GPT needs to store data at the end of the disk; you’d get the warning:
“Warning! Secondary partition table overlaps the last partition by33 blocks!
You will need to delete this partition or resize it in another utility.”

If you can reduce the size of your last partition the conversion should succeed; though I’d question the benefit of doing a conversion;

·         LUKS and LVM work fine on MBR.

·         Your disk can’t be big enough to need GPT if you’re currently using MBR

·         No performance difference between MBR/GPT.

·         Additional requirements for GPT ( UEFI capable BIOS, compatible bootloader )

I would personally wait until I was upgrading the physical disks.

If doing full-disk encryption does Slackware contain an initramfs/initrd capable of mounting an encrypted root partition?
If encrypting specific partitions don’t forget to encrypt swap (swap encryption doesn’t need to be persistent, encryption can be re-initialized every boot with urandom used as the keyfile)



From: Wylug-discuss [mailto:wylug-discuss-bounces at wylug.org.uk] On Behalf Of Türker Sezer via Wylug-discuss
Sent: 26 April 2017 11:23
To: Darren Menachem Drapkin
Cc: wylug-discuss at wylug.org.uk
Subject: Re: [Wylug-discuss] Up rating my filling system

According to documents, you can convert MBR to GPT without data loss [0] and you can make LUKS conversion in-place [1]. But you can't enable LVM without moving data. Also all these operations have data loss risk all time so getting backup before disk operations is always recommended.

[0]: http://slavisa-jovanovic.com/linux/2015/02/19/mbr-to-gpt.html
[1]: http://www.johannes-bauer.com/linux/luksipc/

On Wed, Apr 26, 2017 at 12:04 PM, Darren Menachem Drapkin via Wylug-discuss <wylug-discuss at wylug.org.uk<mailto:wylug-discuss at wylug.org.uk>> wrote:
I posted this on Disqus a few days ago to no effect. I am asking this here, where it is more likely to receive an answer
I have a computer that I use for most of my work. It runs Slackware. To make it simple, years ago, when I first installed it, I used MBR and reiserfs for the filling system. Since then, I have descovered that LUKS provides encripted partitions, and LVM provides re-sizable ones. I have also found that they also are more in-tune with the linux electric than MBR.
What I want to know is, whether there is a way to go from MBR to GPT with LUKS and LVM and keep my exsisting filling system and data intact?

--
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Darren Menachem Drapkin


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Türker Sezer
TS Design Informatics LTD.

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