CentOS 4.3 LInux Raid 1 Losing OS Raid member
 

Hey folks,

This is strange to me.
I have a software sata raid 1 with two slices.
Real basic stuff.

/dev/md0 = os
/dev/md1 = everything else

Every once in a while /dev/sda1 drops out of /dev/md0.
I add it back and it jams along for a few more months and then suddenly it drops back out.

I don`t get it. /dev/sda2 never has a problem.
I can`t find any physical errors.
Any ideas?

Thanks in advance.

Jerry

Hard drives can fail from vibrations, power fluctuations, and errors during automatic diagnostics. Other problems like inconsistent data in cache can make drives fail in a RAID array.

/dev/sda2 is just a partition. It could be the partition table is going.

You may want to get an add-on for your controller that uses a Silicon Image 4723 chip that does hardware RAID-1. The following has the chip that should work with your controller and with Linux.

http://www.cooldrives.com/inbaymosaiir.html

If that is not feasible, I suggest activate logging for the controller and mdadm.