topic Mirror with intrnal controller in Operating System - Linux

Mirror with intrnal controller

Roland Piette — Wed, 31 Jan 2007 10:54:25 GMT

Hi everybody

On a proliant DL585 AMD/64 I have to create a RAID 1 (mirror) for my boot disk. This disk lays on a internal Raid controller.

This box is in poduction and run under RH 4.

How to proceed ?

Roland

Re: Mirror with intrnal controller

Steven E. Protter — Wed, 31 Jan 2007 11:16:16 GMT

Shalom Roland,

If the server has hardware raid, set up raid 1 in the bios. This will present one disk to the system.

This will require you to boot the system but otherwise will be transparent to the system. I/O and performance will be horrible while the system builds the mirror.

Depending on the bios the mirror build may be before boot time which will lengthen the downtime.

SEP

Re: Mirror with intrnal controller

Roland Piette — Thu, 01 Feb 2007 11:10:33 GMT

Shalom SEP

Thanks for your quick answer.

This box has a build in raid controller.

I am afraid to construct the raid in the wrong way, mirror the new one on the actual at the moment I will include de new disk.

It a payroll unit !!!

How can identify the new disk in the Bios ?
Could you point me on a documentation ?

Roland

Re: Mirror with intrnal controller

Ivan Ferreira — Thu, 01 Feb 2007 14:07:33 GMT

Identify your RAID controller model and then search for the documentation in the hp docs page. Do you know the raid controller model?

Re: Mirror with intrnal controller

Roland Piette — Tue, 06 Feb 2007 07:34:48 GMT

Hi Ivan,

Until today, I didn't get the opportunity to boot the server to find out the type of the raid controller.

I am waiting the green light to stop it. I would like to be ready at this moment to bild up the mirror.

Regards,
Roland

Re: Mirror with intrnal controller

Matti_Kurkela — Tue, 06 Feb 2007 08:59:22 GMT

If you have the "hpacucli" or "cpqacuxe" package installed, you can configure the RAID while the system is running.

Those packages and documentation for them are available from:
http://www.hp.com/go/support

Re: Mirror with intrnal controller

Roland Piette — Tue, 06 Feb 2007 11:16:54 GMT

Hi Matti,

I already download the cpqcuaxe package and also the hpsmh package. At the istallation I have an error on dependency. Need libstdc++-libc6.2-2.so.3.

I don't know where I can find this library.
My distribution is RH Entreprise 4 for 64bits AMD.

Thanks in advance,
Roland

Re: Mirror with intrnal controller

Matti_Kurkela — Thu, 08 Feb 2007 04:01:34 GMT

The library you need is an older version of the C++ standard library, so the needed package is named "compat-libstdc++-296".

It is available on the RedHat ES4 installation CDs, just not installed by default.

If you have your system registered in the RedHat Network, just type "up2date --install compat-libstdc++-296" and it should be able to install the library with no further ado.

Re: Mirror with intrnal controller

Roland Piette — Tue, 13 Feb 2007 04:54:31 GMT

Thanks a lot Matti,

Your advice solves my installation problem.
Up to now I don't see any Raid controller (internal & external) in my browser. For this I use a Nautilus browser (not supported) wich was install by default. I can understand that for some important detail this one is not supported but is it normal that no controller at all is displayed in this browser ?

Futher helps will be apprÃ©ciate !

Roland

Re: Mirror with intrnal controller

Ulf Zimmermann — Wed, 14 Feb 2007 20:27:44 GMT

As you said the server is currently in production, I assume you probably have a single disk and want to add another and convert the setup to a RAID1. If you have problems with the graphical interface via browser you can use hpacucli.

hpaculi ctrl slot=0 array A ld 1 show

will show your onboard controller, first array and first logical drive. The output should be something like:

# hpacucli ctrl slot=0 array A ld 1 show

Smart Array 6i in Slot 0

array A

Logical Drive: 1
Size: 33.9 GB
Fault Tolerance: 1+0
Heads: 255
Sectors Per Track: 32
Cylinders: 8716
Stripe Size: 128 KB
Status: OK
Array Accelerator: Enabled
Unique Identifier: 600508B1001FFFFFA000045B30210000
Disk Name: /dev/cciss/c0d0
Mount Points: /boot 99 MB, /usr 10.0 GB, swap 2.0 GB, /var 1023 MB, / 513 MB, /home 20.3 GB

As you can see this was done on a server with a pair of 36GB drives running in RAID1+0. If you have a single drive right now, the Fault Tolerance should show "0". To convert this to a RAID 1+0, add another drive, it should be the same size and speed as the existing drive. Then you can run

hpacucli ctrl slot=0 array A add drives=allunassigned

And then run

hpacucli ctrl slot=0 ld 1 modify raid=1

This should convert it to a RAID1+0.

Re: Mirror with intrnal controller

Roland Piette — Mon, 19 Feb 2007 03:49:11 GMT

Hi all,

My problem is resolved, thanks to all.

I finally install System Management Homepage witch is included in the HP Proliant Essentiels Foundation Pack after installation of many rpm needed and available on my distribution RH CD's.

I discover also that cpqacuxe has to be launch independly before the brower can take the array configuration utility in account (see in the menu).

Thanks again for your help.
Roland