RAID1 /dev/md4 lost one disk partion /dev/sdb4 after reboot, WHY??

Mon Mar 30 00:12:07 UTC 2009

| From: L <yuanlux at gmail.com>

| <5>Linux version 2.6.17.14 (clarke at mccoy.oxsemi.com.asic.oxsemi.com)
| (gcc version 4.1.1) #1 PREEMPT Fri Jan 18 10:40:25 GMT 2008
| <4>CPU: ARM926EJ-Sid(wb) [41069265] revision 5 (ARMv5TEJ)
| <4>Machine: Oxsemi NAS

Neat!  Fedora(?) on an ARM!

http://fedoraproject.org/wiki/Architectures/ARM

Is this really Fedora?

I wonder if the system is well tested on ARM.

Your symptoms sound like problems that others have experienced with
Seagate 7200.1 drives but I see you are using WD drives.