very slow sync

Hi!


I shared a file from node1 to node2, and I make it a raid array. But the
syncronisation is very slow.

The connection between the 2 node is gigabit ethernet. (I can copy files
between the nodes about 36-40MB/sec, and with drbd the syncronisation
speed is about that same as the copy speed).

------------------------------------------------------------------
md3 : active raid1 [dev 07:00][1] nda[0]
      511936 blocks [2/2] [UU]
      [====>................]  resync =  24.2% (126604/511936)
finish=23.6min speed=272K/sec
------------------------------------------------------------------

node1:
 - sata HDD
 - created 500MB file
 - running the server processes
 - kernel 2.6.10 (debian sarge)
 - debian:/home/hygy# cat /etc/enbd.conf 
   server adohygy 1234 /home/hygy/nbdimage.fs -b 512


node2:
 - 2 sata HDD connected with software raid1
 - created an 500MB file mounted with node2:#
losetup /dev/loop0 /home/hygy/slave.fs
 - created a raid array (mdadm --create /dev/md3 --level=raid1
--raid-devices=2 /dev/nda /dev/loop0
 - kernel 2.4.29 (debian sarge)
 - runnnig the client process
 - rg-fw:/# cat /etc/enbd.conf
   client adohygy /dev/nda 192.168.2.1 1234 -n 4 -b 512

Why is it slow?

--
 thanks all
HyGy