Hello.

It is a bug in grub:

https://bugzilla.redhat.com/bugzilla/long_list.cgi?buglist=114690

To solve:

1) Boot from first CD of CentOS 'linux rescue'. 2) From shell start 'grub' 3) From grub execute the following:

root (hd0,0) setup (hd0) root (hd1,0) setup (hd1)

Reboot

Miguel R.

Fajar Priyanto escribió:

Hi all, I'm trying to setup a RAID-1 with Centos4.2 on HP Netserver E60. The raid consists of 2 9,1GB SCSI disks.

The partitioning and installation process went smoothly, but after it finished and rebooting, there is an error: Missing operating system.

The partition is: / /home swap

Bootloader is on device md0.

What could be possibly wrong? Thank you,

Quoting Fajar Priyanto fajarpri@cbn.net.id:

Hi all, I'm trying to setup a RAID-1 with Centos4.2 on HP Netserver E60. The raid consists of 2 9,1GB SCSI disks.

The partitioning and installation process went smoothly, but after it finished and rebooting, there is an error: Missing operating system.

The partition is: / /home swap

Miguel gave you a fix for this particular problem. I'd just add that you might also consider having small /boot on separate partition (and make it the very first partition on the disk). 100-200MB should work perfectly fine. Since your drives are relatively small, it won't make much difference (I guess your / is well within first 8 gigabytes). On larger drivers you could have issues (depending on BIOS) -- for example everything works, than you upgrade the kernel and can't boot anymore (new kernel and/or initrd image ended somewhere on the file system above first 8 gigs). It would also give you more options on how you want to create your / (for exmaple, RAID-5, RAID-10, on logical volume, etc).

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