EXT4 fs beyond 16TB? (non root)

SUSE Product Topics SLES Configure-Administer
1

Hello,

I have a sles12 sp3 with the latest patches system which has an ext4 based 16TB fs which i need to further extend…

i read that ext4 supports 64bit option , but i dont know if this is included in current e2progs package of SLES12 SP3.

does anyone has successfully extended ext4 beyond 16TB?

Thank you in advance.

Michael.

2

[QUOTE=maikcat;55839]Hello,

I have a sles12 sp3 with the latest patches system which has an ext4 based 16TB fs which i need to further extend…

i read that ext4 supports 64bit option , but i dont know if this is included in current e2progs package of SLES12 SP3.

does anyone has successfully extended ext4 beyond 16TB?

Thank you in advance.

Michael.[/QUOTE]
Hi
Should be 1EiB…
Ref: https://www.suse.com/releasenotes/x86_64/SUSE-SLES/12-SP3/#TechInfo.Filesystems.Comparison

3

Good Morning Malcolm and thank you for the response,

When i try to extent the fs beyond 16Tib i get

resize2fs 1.42.11 (09-Jul-2014)
resize2fs: New size too large to be expressed in 32 bits

any ideas?

Michael.

4

Hello Michael,

have you tried “tune2fs”? From its man page on the “-O” option:

[QUOTE]The following filesystem features can be set or cleared using tune2fs:

               64bit  Enable the file system to be larger than 2^32 blocks.[/QUOTE]

Regards,
J

5

Hello all,

Already opened case to SUSE which they provided me the -b switch to convert the FS to 64bit which in SLES12 SP3 is not supported
and i am waiting for a official response…

so for now if you create an ext4 fs and you expect it to grow beyond 16TiB you are out of luck…

i will keep you informed.

Michael.

6

Hello All and thank you for you answers,

Official response was to upgrade my system to SP4 because current SP3 toolset does not support 64bit conversion of ext4.

So i wonder if the so called release notes of their OS are for advertizing purposes only…

I hope that i saved others from the same suffering…

Cheers,

Michael.

7

Hi Michael,

from your response, I read that converting to 64bit Ext4 is not supported. Did you receive any information that creating a new 64bit Ext4 filesystem isn’t supported either?

Regards,
J