Re: mke2fs hung

Tks Robert.

The issue I had was a bit less extreme :)
md and lvm devices are another can of worms, but luckily I don't use 'em 
often :)

BYtE,
  Diego

Il 01/06/2022 12:31, Robert Markula ha scritto:
> 
>> I switched to a second console to look at the issue and found that 
>> stderr tmpfile for mke2fs contains "Found a dos partition table in 
>> /dev/sda2" and stdio tmpfile "prompts" with "Proceed anyway? (n/Y)". 
>> Giving a 'y' in the main console lets it proceed, but it shouldn't 
>> have stopped.
>>
>> It seems the wipefs -af /dev/sda* before parted is not enough. Maybe a 
>> second wipefs is needed between parted and mkfs [*]?
>>
>> IIUC it's quite a corner case (new gpt partition overlapping an old 
>> dos extended partition), but probably it's better to handle it.
>>
> In the past I stumbled across that issue as well. So I created a hook 
> 'mountdisks.DANGEROUS' that includes, among others, the following lines:
> 
> <snip>
> # Clear any MD arrays:
> if [ $(grep md0 /proc/mdstat) ]; then
>      mdadm --stop /dev/md0
> fi
> if [ $(grep md1 /proc/mdstat) ]; then
>      mdadm --stop /dev/md1
> fi
> 
> if [ $(grep md /proc/mdstat) ]; then
>      # Clear the whole disks:
>      mdadm --zero-superblock --force $DISK_A
> 
>      # Clear arrays using a partition (e.g. a swap partition):
>      mdadm --zero-superblock --force ${DISK_A_SWAP}
> fi
> 
> 
> # Clear the partition table:
> sgdisk --zap-all $DISK_A
> <snip>
> 
> Somehow redundant, I know, but I had issues with mdadm before. Never had 
> a problem ever since. But be careful - this ensures that the disk gets 
> completely wiped and no partition is preserved, even if you have a 
> 'preserve' statement in your disk_config.

-- 
Diego Zuccato
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