The RAID is rebuilding on disk 4. Also, disk 2 is not being used. What's your initial RAID configuration? It seems to me that disk 2 failed, while disk 4 was configured as a hot spare, so it took the place. But disk 2 was brought back online, maybe after a reboot of the unit.
At this moment I think you can leave it as is, and wait till the rebild complete. Then check the log for errors. Most likely disk 2 needs to be replaced.
Thanks for your support,
The initial disk configuration was Raid 5 + Spare (using 4 hard drives)
It seems like it finished rebuilding now, however if i want to replace disk 2 which seems to be the problem do I have to move disk 4 to disk 2 slot or i just need to replace the hard drive in disk 2?
Thanks in advance
Thanks for your quick response Edward, it's a great help for me.
Another quick question, currently i'm using 4 x 320GB hard drive.
If I switch disk 2 hard drive to a larger capacity let say 500GB, will it be a problem?
Also does it need to be identical brand for the disk drive, or i can switch to other brand?