Not able to create 28TB ext4 filesystem in rhel6.1
 

Hi,

I have 14 Luns coming from storage having 2 TB size each(total 28TB).

I want to create one filesystem on ext4(limit is 16TB)

I am not able to format using mkfs.ext4.

getting below error:

creation of filesystem failed. command attempted" "/sbin/mkfs -t ext4 /dev/backup_vg/
system error
mkfs.ext4: size of device -- too big to be expressed in 32 bits using a block size of 4096.


even I have tried with 1024 but same error.

Now created 16TB and it's done. I am attaching the error for reference.

Kindly suggest, as we need 28 TB single mount point for backup.


Thanks,
Shankar

The message you got tells you the problem. You're running in 32 bit mode so can not create an ext4 filesystem that large because the maximum block size available (4096) won't give you enough blocks in a 32 bit space.

This has been discussed before for example in the following thread:
http://www.linuxquestions.org/questi...t-24tb-832854/

It appears your options are to switch to a 64 bit install mode or to use a different filesystem type.