[DRBD-user] Single node usage

Lars Ellenberg lars.ellenberg at linbit.com
Sun Sep 7 01:14:46 CEST 2008

Note: "permalinks" may not be as permanent as we would like,
direct links of old sources may well be a few messages off.

On Sat, Sep 06, 2008 at 07:41:51PM +0200, Per Hermansson wrote:
> Hi,
> I've searched the mailing list and found references to this situation  
> before.
> The solution then was to not use DRBD on a single machine between two  
> hard drives and instead use raid 1 (mirroring).
> The reason why I would really like to use DRBD instead of raid is  
> because one of the disks is an external hard drive. The external hard  
> drive is connected via usb and can be removed (disconnected) during  
> operation. The other disk is a local disk which I want to mirror the  
> external drive to.
> In my view DRBD handles the disk disconnection (node failure) the way I  
> want and would be superior compared to using raid.
> Is it possible use DRBD in this situation


> or should I try with a RAID  
> solution instead?


iirc, there is a "bitmap based" mode of software raid as well,
try to use that to avoid spurious full rebuilts.

: Lars Ellenberg                
: LINBIT HA-Solutions GmbH
: DRBD®/HA support and consulting    http://www.linbit.com

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