topic Re: Mirror disk for linux in Operating System - Linux

Mirror disk for linux

Jimmy Tom_2 — Fri, 02 Jul 2004 09:35:24 GMT

Does anyone know if HP offer its Mirror/UX for linux? thx in advance.

Re: Mirror disk for linux

KapilRaj — Fri, 02 Jul 2004 10:26:46 GMT

u mean linux lvm does not support mirroring ?

Kaps

Re: Mirror disk for linux

Paul Cross_1 — Fri, 02 Jul 2004 14:12:14 GMT

There are many utilities that run under linux that provide disk mirroring, LVM being one of them. Mirrordisk/UX to my knowledge is not available for linux.

Re: Mirror disk for linux

Jimmy Tom_2 — Fri, 02 Jul 2004 18:04:12 GMT

Basically, I am running Redhat Linux V3 Kernal 2.4.3 on Compaq DL380 6 disks and booted the box and lost the LVM info for VG02. So I was justing trying to see if there was any other mirror sw that is more reliable. Also looking @ Veritas Foundation Suite 2.2 for Linux. Anyone knows if this is any better? Any suggestion is welcome. Thanks in advance.

Re: Mirror disk for linux

Jeroen Peereboom — Sat, 03 Jul 2004 04:38:14 GMT

Why not use the RAID controller for hardware mirroring?

JP.

Re: Mirror disk for linux

Steven E. Protter — Sat, 03 Jul 2004 15:16:50 GMT

Mirror/UX is a paid additional product that adds into HP-UX LVM.

It was not ported at the same time that LVM was ported to Linux.

Linux has its own disk mirroring system which works quite well. It can be done at setup time with the disk druid or after the fact.

See this link:

http://puggy.symonds.net/~rajesh/raid.html

or

http://www.linuxjournal.com/article.php?sid=6412

http://www.tldp.org/HOWTO/ATA-RAID-HOWTO/

I generally handle this at first install with the disk druid, though i've done it once after the fact just to prove I could.

SEP

Re: Mirror disk for linux

Serviceguard for Linux — Tue, 06 Jul 2004 02:12:33 GMT

Steven has it nearly right. LVM is not a port of HP/UX LVM, instead it was developed independently and used much of the same command structure as HP/UX LVM. LVM2 is available with the 2.6 kernel. These are now maintained by RedHat.

MD is the built in SW raid driver for Linux with MDADM being the administration tool. RIAD drives can be defined at install or afterwards. It is more difficult to set the system to RAID1 after install.