Would you help to me ? why /dev/md0 such SLOWLY WRITE data on it ?

[Andre Sokov]

Hello.

Would you help to me ?
I have created /dev/md0 :

1)
root at gw-g48-1:/# mdadm -Q --detail /dev/md0
/dev/md0:
        Version : 00.90.03
  Creation Time : Fri Jul 27 16:45:28 2007
     Raid Level : raid5
     Array Size : 781417472 (745.22 GiB 800.17 GB)
  Used Dev Size : 390708736 (372.61 GiB 400.09 GB)
   Raid Devices : 3
  Total Devices : 3
Preferred Minor : 0
    Persistence : Superblock is persistent

    Update Time : Sat Aug  4 19:00:07 2007
          State : clean
 Active Devices : 3
Working Devices : 3
 Failed Devices : 0
  Spare Devices : 0

         Layout : left-symmetric
     Chunk Size : 64K

           UUID : 278b254f:5cb1219c:6eeef226:f99396ad
         Events : 0.60

    Number   Major   Minor   RaidDevice State
       0       8       17        0      active sync   /dev/sdb1
       1       8       33        1      active sync   /dev/sdc1
       2       8       49        2      active sync   /dev/sdd1
root at gw-g48-1:/#

2)
root at gw-g48-1:/# mount | grep md
/dev/md/0 on /raid00 type xfs (rw,nosuid,nodev,sync,noatime)

3)
root at gw-g48-1:/# df -mh | grep md
/dev/md/0             746G  281G  465G  38% /raid00


why /dev/md0 such SLOWLY WRITE data on it ?
when i copy some data into /raid00 - speed is not more than 400 kb/s !!
when i read data from it - speed is about 7-8 mb/s

why ? can i grow speed read/write ??


-- 
 Andre Sokov
 Saturday, August 4, 2007, 7:02:19 PM