Bug 177271 - cpio can't backup files on ext3 unless fs created with largefile support
cpio can't backup files on ext3 unless fs created with largefile support
Product: Fedora
Classification: Fedora
Component: cpio (Show other bugs)
i386 Linux
medium Severity medium
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Assigned To: Peter Vrabec
Brock Organ
Depends On:
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Reported: 2006-01-08 12:28 EST by sean fulton
Modified: 2007-11-30 17:11 EST (History)
0 users

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Doc Type: Bug Fix
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Last Closed: 2006-01-09 05:04:39 EST
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Description sean fulton 2006-01-08 12:28:48 EST
From Bugzilla Helper:
User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.8) Gecko/20051111 Firefox/1.5

Description of problem:
Backing up files larger than 2 Gbytes in size with cpio results in the error: "Value too large for defined data type" and the files are skipped.

I thought it was a problem with CPIO, and downloaded and re-compiled many versions, all with the same result. It turns out that cpio will archive files larger than 2 Gbytes if they are an ext3 filesystem created with -T largefile. But on filesystems created with the default ext3 fs creation options, it fails.

This is an issue because we have a filesystem on web content which is mainly small files, yet there are one or two large files that need to be backed up. Our current cpio-based backup scripts simply skip the files.

Please note that other utilities, inclusing zcat and dd work on large files which cpio fails to copy. For example, I can do zcat largefile.cpio | cpio -itv with no problem.

Version-Release number of selected component (if applicable):

How reproducible:

Steps to Reproduce:
1. Create a file 3 GB in size (largefile.tar)
2. ls *.tar | cpio -ov -O./backup.cpio
3. You get the error.
4. Copy file to a machine with ext3 -T largefile used to create the filesystems
5. ls *.tar | cpio -ov -O./backup.cpio
6. It works!

Actual Results:  Value too large for defined data type

Expected Results:  File should be backed up.

Additional info:
Comment 1 Jesse Keating 2006-01-08 12:36:12 EST
This sounds like a non-legacy specific issue.  This is an upstream cpio issue,
and should be filed upstream with them.
Comment 2 Jesse Keating 2006-01-08 12:37:53 EST
Does this still happen in Fedora Core Devel (or even FC4 for that matter)?
Comment 3 sean fulton 2006-01-08 13:00:24 EST
The latest version I tried to was 2.6-2, which I think came from the pre-release
FC4. I downloaded and compiled cpio-2.6-2.src.rpm on the target system with no luck.

Comment 4 Peter Vrabec 2006-01-09 05:04:39 EST
Try cpio-2.6-9.FC4 or cpio-2.6-10(devel), file limit size has been enlarged to
4GB there. Because of cpio header it is not possible to get over 4GB limit.It's
up to upstream to change it.

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