[DRBD-user] DRBD data integrity check

Trinh, Hung HTrinh at CROSSBEAMSYS.COM
Fri Mar 27 16:24:08 CET 2009

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


Hello list,

 

I'm running DRBD 8.2.5 on a couple of 64bit SMP PCs with CentOs 5.1.

The PCs have one DRBD partition on /dev/sda3 and was completely synced.

PC1 is Primary and PC2 is Secondary.

After they were synced, I brought down the drbd device on PC2.  

 

On PC2 (secondary node):

I ran fsck and mounted the /dev/sda3 to make sure the files look good.  

I changed the content of 1 file, umount the /dev/sda3 and brought the
drbd device up.

 

 

The /proc/drbd on both PCs showed both nodes's ds are up-to-date.

I then brought down drbd on PC2 (secondary node), did fsck on /dev/sda3
and mounted

The file I modified did not get updated to match with the Primary node,
PC1.

 

My questions:

1. Is this a correct behavior?

2. If so, how can I fix it without going through a full sync?

3. If so, is there a way to vadilate the integrity of DRBD devices?

4. If not, is this a bug? or I did something wrong?

 

 

Thanks for any help.

 

- Hung

 

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