topic Re: ways for mirror in Operating System - Linux

ways for mirror

Victor_5 — Tue, 23 Oct 2001 17:33:27 GMT

I am looking for:

1. 2 methods for replicate files
2. the best way for mirror the system disks for Red Hat Linux

Any reply is really appreciate.

Shawn

Re: ways for mirror

Bernie Vande Griend — Tue, 23 Oct 2001 21:13:54 GMT

If you want two boot disks and want them in sync continuously, then your best bet is to use RAID:

http://www.redhat.com/docs/manuals/linux/RHL-7.1-Manual/ref-guide/ch-raid.html

On earlier version RAID was a bit faulty, but its better with version 7.l.

I haven't done this, but it probably also possible if you use LVM for Linux.
http://www.europe.redhat.com/documentation/HOWTO/LVM-HOWTO.php3

This link contains information to LVM and other partition possibilities:
http://www.europe.redhat.com/documentation/HOWTO/Filesystems-HOWTO-2.php3

If you don't need to have the 2 in sync all the time then you could use rdist or a perl script called mirror:
ftp://src.doc.ic.ac.uk/computing/archiving/mirror/

Hope this helps. Otherwise give us a few more details.

Re: ways for mirror

Santosh Nair_1 — Tue, 23 Oct 2001 23:02:16 GMT

The Linux implementation of LVM does not support mirroring. The reason is that it is supported in the kernel using the md kernel modules. These modules support several RAID levels including mirroring. Here is a URL on how to set up software level RAID on Linux:

http://www.linuxdocs.org/HOWTOs/Software-RAID-HOWTO.html

Hope this helps.

-Santosh

Re: ways for mirror

Victor_5 — Wed, 24 Oct 2001 12:47:54 GMT

Hi Bernie & Santosh:

You two again! How are you doing!

Thanks for your inputs although I have already looked throuth all mentioned manuals.

Shawn

Re: ways for mirror

Bernie Vande Griend — Wed, 24 Oct 2001 13:41:50 GMT

Thanks. Doing fine. Do you have specific questions about mirroring that we or others can help with? Software raid is probably the way to go unless there is something in your situation that will prevent it from working.