Location of Hot Spare

[Lyman DeLiguori]

Does it matter which bay the Hot Spare goes into on a DL380-G3? If so, which bay?

I take that should the RAID 1+0 fail this Hot Spare will automatically be brought online?

[Michael A. McKenney · Accepted solution]

You might want two for 1+0. The location does not matter. Make sure they are marked properly to fail over to that array. You can list them as global.

[Lyman DeLiguori]

Thanks.

Marked properly where? In the config (F8) at boot where disks are setup it merely offers a choice of RAID and a checkbox if a spare is present or not.

Why would you recommend two drives as spares? The odds of both of the primaries failing would seem rather remote...

[Mauricio Salas]

The bay doesnt matter, so go to the ACU and select the HDD that you want click on Spare management, and select the array, when a HDD fail it will start the rebuilding process automatically

[Lyman DeLiguori]

Thank you very much but a couple of quick questions.

This DL380-G3 is running Windows-7 Professional which is not a listed O/S. I would suspect that Server 2003 would be the most logical choice for the ACU.

Also, do you have a link to the ACU utility for the DL380-G3?

Many thanks again for your help.

[Lyman DeLiguori]

Sorry - meant to ask. What is the difference between the CLI and other versions as found here:

http://h20000.www2.hp.com/bizsupport/TechSupport/SoftwareIndex.jsp?lang=en&cc=us&prodNameId=468781&prodTypeId=329290&prodSeriesId=468780&swLang=8&taskId=135&swEnvOID=1005

Again, thank you.

[Erdogan Temur]

Hi,

The Array Configuration Utility CLI description:

The Array Configuration Utility CLI is a commandline-based disk configuration program for Smart Array Controllers and RAID Array Controllers.

There are other versions of the user interface.

[Michael A. McKenney]

RAID 1+0 are installed in pairs. You would have an unusable slot with a single spare. So I usually populate RAID 10 or 1+0 in pairs.

[Lyman DeLiguori]

Thanks Mike. So you're saying there should be one spare for each primary? (I.e., 2 Primary disks in RAID 1+0, and two Spares).

My thought was that if one of the primaries in the RAID 1+0 failed the single spare would be the failover point. No?

[Michael A. McKenney]

In RAID, you don't have primary or secondary. All four drives work together. 1+0 means duplexing and striping. In SAS RAID 10, you duplex pairs of drives and then stripe the pairs. I do two spares because you add drives in pairs to RAID 1+0 or 10. You would have odd space not usable, if you fill out the enclosure. So I usually just add two spares and set them to global. You can't have too many spares or backups.