Re: SW-RAID0 Performance problems

[Andreas Peter <ujq7@rz.uni-karlsruhe.de>]

Mark Hahn schrieb:
> > hdparm -t /dev/md0 : 20.25 MB/sec
> > hdparm -t /dev/hda : 20.51 MB/sec
> > hdaprm -t /dev/hdc : 20.71 MB/sec
>
> md0 is composed of partitions located where on hda and hdc?
> also, what's your CPU?

This is my raidtab file:

raiddev                 /dev/md0
 
raid-level              0    # it's not obvious but this *must* be
                             # right after raiddev
 
persistent-superblock   1    # set this to 1 if you want autostart,
                             # BUT SETTING TO 1 WILL DESTROY PREVIOUS
                             # CONTENTS if this is a RAID0 array created
                             # by older raidtools (0.40-0.51) or mdtools!
 
chunk-size              32
 
nr-raid-disks           2
nr-spare-disks          0
 
device                  /dev/hda3
raid-disk               0
 
device                  /dev/hdc3
raid-disk               1

The partition table:

Disk /dev/hda: 16 heads, 63 sectors, 59556 cylinders
Units = cylinders of 1008 * 512 bytes
 
   Device Boot    Start       End    Blocks   Id  System
/dev/hda1   *         1        21     10552+  83  Linux
/dev/hda2            22       542    262584   82  Linux swap
/dev/hda3           543     59556  29743056   fd  Linux raid autodetect

My board is a Gigabyte 6BXDS BX-Chipset 2 Celerons@533 MHz

Andreas
-- 
Andreas Peter *** ujq7@rz.uni-karlsruhe.de