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Re: Please help me resize my ext4 file system to size > 16TB

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On 06/13/2017 10:48 AM, Doug wrote:
>
> On 06/12/2017 11:33 PM, R. Ramesh wrote:
>>> You implied you don't even have a backup of that data, which means you
>>> have exactly one chance of getting it right.  This is a non-starter.
>>>
>>> First: you are warned to NEVER proceed with a filesystem resize before
>>> you have a valid, current, and *tested* backup.
>>>
>>> You are also warned that the ext4 *conversion* to 64-bit block numbers
>>> so as to be able to span more than 16TB is NOT your typical filesystem
>>> resize operation in the first place.  It touches a *lot more* of the
>>> filesystem and the risks are much higher than just adding an extent.
>>> Even if it works flawlessly, it is not going to result in an optimal
>>> filesystem.
>>>
>>> The recommended procedure is to create a *new* filesystem and restore
>>> from backup (or copy from the legacy filesystem if you find a way to
>>> have both at the same time).  And for such large filesystems, the 
>>> use of
>>> "xfs" instead of "ext4" should be seriously considered.
>>>
>>> Second: whatever reasons you had, or excuses you gave yourself, nothing
>>> is going to get your data back if the filesystem ends up damaged beyond
>>> repair and you don't have a backup.
>>>
>>> "it would require updates that I am not ready do to yet"? Then DON'T.
>>> Find another way to solve your immediate problem, and postpone the
>>> larger filesystem for when you update everything.
>>>
>>> You *have* been warned.
>>>
>>>
>>> Now, you did not give us any idea of what is in that filesystem and 
>>> what
>>> you use it for, but as an alternative to resizing it, maybe you could
>>> create several extra filesystems instead of enlarging the one you have
>>> and attaching these extra ones to wherever you need more space? Any
>>> subdirectory can be made an entirely separate filesystem...
>>>
>>> This wouldn't work for everything (e.g. you can't hardlink or
>>> fast-rename across filesystems), but maybe it would work for whatever
>>> you use that big filesystem for?
>>>
>>> -- 
>>>    Henrique Holschuh
>> Henrique,
>>
>>   Let us not worry about backup. The data is just videos and not 
>> worth the effort. They are all recreatable with some effort. So, it 
>> is ok to try resize2fs and if that dies, I will simply get the data 
>> from my DVDs/Blurays.
>>
>>   I don't think there is in place ext4 to xfs conversion. So, 
>> converting to xfs is less possible that resize2fs.
>>
>>   I am just looking for path of least resistance. That is why I asked 
>> if it possible to resize without any upgrade. I will eventually 
>> upgrade and eventually figure out something. I just need to hear that 
>> there isn't a simple solution I have overlooked *today*. That is all.
>>
>> Ramesh
>>
>>
> It would seem to me that the simplest way to solve this problem would 
> be to buy a second drive that is big enough, format it with xfs, and 
> copy everything
> you want to keep onto the new drive. Then when everything is done to 
> your satisfaction, you can keep the original drive as a backup, or if 
> you really
> don't care about backups, reformat the original drive and then use it, 
> for whatever you want. (Make sure you copy the boot setup onto the new 
> drive!)
>
> --doug
>
Thanks. I have to spend at least $500 to get 12+TB disk. Not a good 
solution. I will wait it out till a stable resize2fs appears.

Ramesh

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Please help me resize my ext4 file system to size > 16TB Ram Ramesh <rramesh2400@gmail.com> - 2017-06-12 00:20 +0200
  Re: Please help me resize my ext4 file system to size > 16TB Jonathan Marquardt <parckwart@parckwart.de> - 2017-06-12 14:30 +0200
    Re: Re: Please help me resize my ext4 file system to size > 16TB Ramasubramanian Ramesh <rramesh@ti.com> - 2017-06-12 23:20 +0200
      Re: Please help me resize my ext4 file system to size > 16TB Henrique de Moraes Holschuh <hmh@debian.org> - 2017-06-13 01:40 +0200
        Re: Re: Please help me resize my ext4 file system to size > 16TB "R. Ramesh" <rramesh@verizon.net> - 2017-06-13 07:00 +0200
          Re: Please help me resize my ext4 file system to size > 16TB Henrique de Moraes Holschuh <hmh@debian.org> - 2017-06-13 12:10 +0200
            Re: Re: Please help me resize my ext4 file system to size > 16TB "R. Ramesh" <rramesh@verizon.net> - 2017-06-14 02:50 +0200
              Re: Please help me resize my ext4 file system to size > 16TB Henrique de Moraes Holschuh <hmh@debian.org> - 2017-06-14 15:30 +0200
          Re: Please help me resize my ext4 file system to size > 16TB Doug <dmcgarrett@optonline.net> - 2017-06-13 18:10 +0200
            Re: Please help me resize my ext4 file system to size > 16TB "R. Ramesh" <rramesh@verizon.net> - 2017-06-14 02:40 +0200

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