[Ocfs2-devel] Large (> 16TiB) volumes revisited

[Sunil Mushran]

On 06/28/2010 06:15 PM, Patrick J. LoPresti wrote:
> On Mon, Jun 28, 2010 at 5:47 PM, Sunil Mushran<sunil.mushran at oracle.com>  wrote:
>    
>> BTW, have you tested with cleared INCOMPAT_64BIT journal flag?
>>      
> Hm, easier said than done. "tunefs.ocfs2 -J noblock64 ..." bombs out with:
>
> tunefs.ocfs2: Unknown journal option: "block64"
> Valid journal options are:
>          size=<journal-size>
> Usage: tunefs.ocfs2 [options]<device>  [new-size]
> [etc.]
>
> By the way, it complains similarly about "tunefs.ocfs2 -J block64",
> which puts the lie to the failure message in my patch...
>
> When I try to re-format the partition without "-J block64", I get:
>
> ERROR: jbd can only store block numbers in 32 bits. /dev/md0 can hold
> 5082795264 blocks which overflows this limit. If you have a new enough
> Ocfs2 with JBD2 support, you can try formatting with the "-Jblock64"
> option to turn on support for this size block device.
> Otherwise, consider increasing the block size or decreasing the device size.
>    

Which version of tools are you running? block64 was added after 
ocfs2-tools 1.4.2.