Hello,

On Tue, 12 Sep 2017 14:26:58 -0600 José Andrés Matamoros Guevara wrote:

> Wow! I did it without partitioning the disk and it’s working. Thanks a lot 
> for your help.
>
Been doing that for ages.
Of course having a partition that is a good bit smaller than then actual
disk size would be a good starting point/best practice as well.
 
>  
> 
> Didn’t know you can do it this way. There are something you can learn every 
> moment…
> 
>  
> 
> OK, Yannis: thanks a lot again. It’s sync’ing now and it’s going to take 13 
> hours. I was thinking on bringing it up as StandAlone and copy everything 
> from one disk to another and then resync from the small one to the bigger 
> one, but it was going to take a few days… Much better this solution.
> 
>  
> 
> We can close the case now, if no one has another comment.
> 
What I suspect is that you created the original partition a long time ago,
when fdisk and friends were reserving less space for bootloaders and other
things.
So a default partition these days would be smaller.

For example an old system here, created more than 7 years ago:
---
Disk /dev/sda: 69.3 GiB, 74355769344 bytes, 145226112 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: dos
Disk identifier: 0x000ae7e9

Device     Boot     Start       End  Sectors  Size Id Type
/dev/sda1  *           63  15631244 15631182  7.5G fd Linux raid autodetect
---

Versus one created recently (a year ago):
---
Disk /dev/sda: 186.3 GiB, 200049647616 bytes, 390721968 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes
Disklabel type: dos
Disk identifier: 0xca6f7668

Device     Boot     Start       End   Sectors   Size Id Type
/dev/sda1  *         2048 292968447 292966400 139.7G fd Linux raid autodetect
---

Christian
>  
> 
> Andres.
> 
>  
> 
>   _____  
> 
>  
> 
> From: Yannis Milios [mailto:[email protected]] 
> Sent: Tuesday, 12 September, 2017 9:55 AM
> To: José Andrés Matamoros Guevara <[email protected]>
> Cc: drbd-user <[email protected]>
> Subject: Re: [DRBD-user] Receiving a message "disk size of peer is too small"
> 
>  
> 
> >The partition takes all the disk, but in the new one, when I created it, was 
> >a little smaller.  
> 
>  
> 
> That's the case then. What about leaving the new disk unpartitioned and using 
> it as /dev/sdb (instead of /dev/sdb1) ?
> 
>  
> 
> Otherwise I guess 2 options remain:
> 
>  
> 
> - Buy a bigger disk
> 
> - Shrink the original in order to match the size of the new (dangerous):
> 
>  
> 
> https://docs.linbit.com/doc/users-guide-83/s-resizing/
> 
>  
> 


-- 
Christian Balzer        Network/Systems Engineer                
[email protected]           Rakuten Communications
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