topic Re: Redhat 2.1 I64 OS mirroring in Operating System - Linux

Redhat 2.1 I64 OS mirroring

Darrin St. Amant — Thu, 13 May 2004 16:53:05 GMT

Has anyone been successful mirroring the EFI (vfat) partition w/ LVM in RH2.1 I64? If so can you give details.

thanx
ds.

Re: Redhat 2.1 I64 OS mirroring

Steven E. Protter — Thu, 13 May 2004 19:21:38 GMT

I have not.

What I can tell you is the LVM port in Red Hat does not include mirror/ux, so lvm can't do the mirror.

The way to go with any filesystem is to use the Red Hat Software Raid.

Thats the interface that is called disk druid in the install process.

SEP

Re: Redhat 2.1 I64 OS mirroring

Roberto Polli — Fri, 14 May 2004 09:15:08 GMT

Hi,
got same problem. I think not.
I hope to shift from As2.1 to AS3.0

I think that if it's possible you can't do that after first boot.
Maybe You can mirror the other partitions recreating on the 2nd drive the same partition table of the first. linux raidtools shouldn't need a whole disk.

In studying about it anyway and i'll let you know. Please do the same.
Peace, R.

Re: Redhat 2.1 I64 OS mirroring

Darrin St. Amant — Fri, 14 May 2004 09:45:10 GMT

Well Maybe I answered my own question. So w/ I64 4640 server w/ dual channel scsi, I put the /boot/efi on RAID 1 partition which was /dev/md0 and was able to boot to it from both drives. I pulled each drive and booted from it... hmmm :) I had to reset my boot paths though... I not clear how this is wrking.... though...

anyone?

ds

Re: Redhat 2.1 I64 OS mirroring

Roberto Polli — Wed, 19 May 2004 09:22:18 GMT

shortly:
you had:
one simple /dev/sda with OS+/boot/efi
one mirror /dev/md0 empty

now you have:
one mirrored disk /dev/md0

questions:
did you partition /dev/md0 ?
how do you access /dev/md0 partitions?
did you put /boot/efi on a vfat partitions?

Peace, R.

Re: Redhat 2.1 I64 OS mirroring

Darrin St. Amant — Thu, 20 May 2004 14:48:23 GMT

Hey Roberto,
Remember your RAID is from the OS level which /dev/md then becomes a virtual device pointed to physical device. So that being the case your /boot/efi is still residing on the physical hardware path to the blk device. So yes, I did partition the /dev/md devices, so from the EFI prompt I see many blk partitions. the /boot/efi resides on the first partition of the device.
Hope this helps, let me know if you need additional info.

thanx
ds.