Bug 789112

Summary: We would like >16tb support in e2fsprogs
Product: Red Hat Enterprise Linux 6 Reporter: Chris Pepper <pepper>
Component: e2fsprogsAssignee: Eric Sandeen <esandeen>
Status: CLOSED WONTFIX QA Contact: BaseOS QE - Apps <qe-baseos-apps>
Severity: medium Docs Contact:
Priority: unspecified    
Version: 6.3CC: sct
Target Milestone: rc   
Target Release: ---   
Hardware: All   
OS: Linux   
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Fixed In Version: Doc Type: Bug Fix
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Clone Of: Environment:
Last Closed: 2012-02-17 23:45:33 UTC Type: ---
Regression: --- Mount Type: ---
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:

Description Chris Pepper 2012-02-09 20:34:27 UTC 
Description of problem:
e2fsprogs v1.42 adds the ability to create filesystems of 16tb and larger.
We would like v1.42, or at least backport of its large filesystem support, in RHEL 6.

Version-Release number of selected component (if applicable):
RHEL 6.2 has v1.41, and presumably doesn't have a backport of large filesystem support as I haven't seen anything about this in the release notes.

How reproducible:
Always.

Steps to Reproduce:
1. Attempt to create a filesystem of 16tb or larger on an array.
  
Actual results:
mkfs.ext4 fails.

Expected results:
With e2fsprogs v1.42, mkfs.ext4 should work
Comment 2 Eric Sandeen 2012-02-09 21:46:35 UTC 
e2fsprogs-1.42 was a massive change to e2fsprogs compared to the RHEL6 codebase:

 471 files changed, 44469 insertions(+), 14822 deletions(-)

Those changes do not yet have sufficient testing or real-world experience to warrant enterprise support.  It is also not yet complete; for example resize support is not there.

In RHEL6, if you need > 16T, XFS is available and scales very well for large filesystems.
Comment 3 Eric Sandeen 2012-02-17 23:45:33 UTC 
For now, in RHEL6 this is WONTFIX.  If upstream gets to the point where >16T is feasible on ext4, we can re-open and/or re-consider this one.  Today, XFS is available and robust for these usecases.