Re: `grub-install` failed on a partitionless fully luks encrypted 4TB HDD

[Andrei Borzenkov]

07.12.2016 21:24, Hamid Nassiby пишет:
> Hi
> ​​
> ,
> 
> I am trying to install grub (v. 2.02~beta2-22+deb8u1) on a partitionless
> 4TB HDD which is fully encrypted by luks. Over the luks, I have 3 logical

You cannot boot from disk if it is fully encrypted. You need at least
unencrypted space where bootloader is stored. Please show "fdisk -l" and
blkid output and explain what is what.

> volumes (LVM2), one is
> ​for ​
> swap,
> ​second for​
> 
> ​/​
> and the last one
> ​ for /​
> home. I have a Debian Jessie 8.6 installed on the
> ​setup (in fact I moved an already existing installation to this new 4TB
> HDD). I am able to boot into the installed system via a grub which is
> installed on another HDD (sda which has the same version of grub and the
> same version of Debian).
> 
> But I've not been able to install grub on this drive (which is /dev/sdb in
> my setup).
> I get the following lines:
> 
>  address@hidden:/# grub-install  --force /dev/sdb
>>> Installing for i386-pc platform.
>>> File descriptor 4 (/) leaked on vgs invocation. Parent PID 1920:
>>> grub-install
>>> File descriptor 4 (/) leaked on vgs invocation. Parent PID 1920:
>>> grub-install
>>> File descriptor 4 (/) leaked on vgs invocation. Parent PID 1920:
>>> grub-install
>>> File descriptor 7 (/) leaked on vgs invocation. Parent PID 1920:
>>> grub-install
>>> File descriptor 8 (/) leaked on vgs invocation. Parent PID 1920:
>>> grub-install
>>> grub-install: error: unable to identify a filesystem in
>>> hostdisk//dev/sdb; safety check can't be performed.
>>>
>>
> ​If I try with -s flag:
> 
> address@hidden:/# grub-install  -s /dev/sdb
>>> Installing for i386-pc platform.
>>> File descriptor 4 (/) leaked on vgs invocation. Parent PID 4091:
>>> grub-install
>>> File descriptor 4 (/) leaked on vgs invocation. Parent PID 4091:
>>> grub-install
>>> File descriptor 4 (/) leaked on vgs invocation. Parent PID 4091:
>>> grub-install
>>> File descriptor 7 (/) leaked on vgs invocation. Parent PID 4091:
>>> grub-install
>>> File descriptor 8 (/) leaked on vgs invocation. Parent PID 4091:
>>> grub-install
>>> grub-install: warning: Attempting to install GRUB to a partitionless disk
>>> or to a partition.  This is a BAD idea..
>>> grub-install: error: embedding is not possible, but this is required for
>>> RAID and LVM install.
>>> ​
>>
>>
> ​I have​ put "GRUB_ENABLE_CRYPTODISK=y" in "/etc/default/grub" and my
> grub.cfg entry is the same as the one on /dev/sda (which already has grub
> installed on it. sda is a partitioned drive non-encrypted and non-lvm).
> 
> Any idea would be much appreciated,
> Thanks in advance,
> Hamid
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