Le 04/10/2012 20:56, Michael Stowe a écrit :
>
>> The inode number of the ext4 is static.
>>
>> - How can I do to increase the number of inodes?
>
> The number of ext4 inodes are set when the ext4 volume is created, so, you
> have to recreate the file system.  Perhaps using an alternative to ext4.

I thought resize2fs also increased the number of inodes. damn!

The file system has the option "resize_inode" is that it can help to 
increase the size or number of inode?


>> - I can replace one by one the 500GB drives with 1TB drive, increase the
>> logical volume for Backuppc and the file system ?
>
> That won't help.  This is from the mkfs.ext4 man page:
>
> "Be warned that it is not possible to expand the number of inodes on a
> filesystem after it is created, so be careful deciding the correct value
> for this parameter."

So I must create a second logical volume, format it with a smaller 
inode_ratio as 4096, and copy the Backuppc data. After, I could format 
the old logical volume for re-use.

So, I'll replace the disk one by one by disks of 1TB

For RAID10 with MD I have two choices, I can increase the size of 
partitions for each disk and therefore the array, or create a second 
partition on each disk and a second array in RAID 10.

Is I can increase the size of an RAID 10 array ? Manpage only talks 
about RAID 1/4/5/6.


Backuppc uses hard links which are restricted to a file system. I do not 
know between what directory are hard links.

Is I can mount the "cpool" directory on a logical volume and the "pc" 
directory on another?



Thank you for your answers.
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