[Beowulf] Problem with ext3 filesystem?

[Jin, Yao]

On Fri, Feb 13, 2009 at 12:16 AM, Joe Landman <
landman at scalableinformatics.com> wrote:

> Jin, Yao wrote:
>
>> Ten 1TB disks make up of a RAID-5 volume.
>> My OS is rockslinux 5.0(based on centos 5.1), only ext3 is available
>> during installation.
>> This volumn is partitioned as one single ext3 filesystem.
>>
>> On the first reboot after installation , the error occurs:
>> The filesystem size is 1952447718 blocks
>> Physical size is 341834982 bloks.
>> The filesystem is corrupted.
>>
>> I find that filesystem size is in agreement with actual capacity(
>> 1952447718*4Kb = 7.27TB).
>>
>> The partition can be mounted manually after entering system. But I can't
>> stop worring  about unexpected collapse...
>>
>
> You shouldn't use ext3 for this situation.
>
> How is your RAID set up in terms of partition table?  It needs to be gpt
> based.  Last I checked, Redhat/Centos 5.x had problems booting from GPT (is
> this still true?) based systems.

Default LABEL-TYPE is 'msdos'，after changing it into gpt, no error
occurs.This is the first time I deal with volumn larger than 2TB.
Thank you!


>
>
> I would suggest carving out a LUN specific for boot/root, and use the rest
> for storage.  Moreover, use the xfs kernel module.  If rockslinux 5.0
> doesn't support it, I'd suggest looking at different distributions
> (seriously).
>
> Large file system support is not something ext3 is good at, and it is
> something xfs is very good at.
>
> Joe
>
>
>>
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>
>
> --
> Joseph Landman, Ph.D
> Founder and CEO
> Scalable Informatics LLC,
> email: landman at scalableinformatics.com
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