ok thanks, I will look into this.
Professor Samuel Aparicio BM BCh PhD FRCPath
Nan and Lorraine Robertson Chair UBC/BC Cancer Agency
675 West 10th, Vancouver V5Z 1L3, Canada.
office: +1 604 675 8200 cellphone: +1 604 762 5178: lab website
http://molonc.bccrc.ca
On Jan 21, 2011, at 2:00 PM, Andreas Dilger wrote:
> On 2011-01-21, at 14:50, Samuel Aparicio wrote:
>> modinfo reports as follows. seems like the ext4 modules.
>> the odd thing is that the format works when the disk array is already
>> presented as a raid set, rather than making the raidset with mdadm on the OSS
>>
>> --------
>> filename:
>> /lib/modules/2.6.18-194.3.1.el5_lustre.1.8.4/updates/kernel/fs/lustre-ldiskfs/ldiskfs.ko
>> description: Fourth Extended Filesystem
>> ---------
>
> After the filesystem is formatted with mkfs.lustre, you should be able to
> mount it directly with "mount -t ext4 /dev/md??? /mnt" and see a few files in
> it.
>
> If that doesn't work then the format failed for some reason. Providing the
> output of "mkfs.lustre -v {options}" would help diagnose it.
>
>> On Jan 21, 2011, at 12:59 PM, Andreas Dilger wrote:
>>
>>> On 2011-01-21, at 13:36, Samuel Aparicio wrote:
>>>> trying to create an ext4 lustre filesystem attached to an OSS.
>>>> the disks being used are exported from an external disk enclosure.
>>>> i create a raid10 set with mdadm from 16 2Tb disks, this part seems fine.
>>>> I am able to format such an array with normal ext4, mount a filesytem etc.
>>>> however when i try the same thing, trying to format for a lustre
>>>> filesystem I am unable to mount the filesystem and lustre does not seem to
>>>> detect it.
>>>> the lustre format completes normally, without errors.
>>>
>>> You are probably formatting the filesystem with an ext4 feature that is not
>>> in the ldiskfs module you are using.
>>>
>>>> lustre version 1.8.4
>>>> kernel 2.6.18-194.3.1.el5_lustre.1.8.4
>>>> disk array is a coraid SATA/AOE device which has worked fine in every
>>>> other context
>>>
>>> Do you have the ext4-based ldiskfs RPM installed? It is a separate
>>> download on the download page. You can check whether the ldiskfs module
>>> installed was based on ext3 or ext4 with the "modinfo" command:
>>>
>>> [root]# modinfo ldiskfs
>>> filename:
>>> /lib/modules/2.6.32.20/updates/kernel/fs/lustre-ldiskfs/ldiskfs.ko
>>> license: GPL
>>> description: Fourth Extended Filesystem
>>> ^^^^^^^^^^^^^^^^^^^^^^^^^^
>>>
>>> author: Remy Card, Stephen Tweedie, Andrew Morton, Andreas Dilger,
>>> Theodore Ts'o and others
>>> srcversion: D5D8992C8B3E6FCA6ED4FF2
>>> depends:
>>> vermagic: 2.6.32.20 SMP mod_unload modversions
>>>
>>>
>>> Cheers, Andreas
>>> --
>>> Andreas Dilger
>>> Principal Engineer
>>> Whamcloud, Inc.
>>>
>>>
>>>
>>
>
>
> Cheers, Andreas
> --
> Andreas Dilger
> Principal Engineer
> Whamcloud, Inc.
>
>
>
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