topic Re: HDD Replacement in HP-UX in Operating System - HP-UX

HDD Replacement in HP-UX

Ghazanfar_2 — Thu, 24 Mar 2011 04:37:01 GMT

Hi All,

I am new bee. Can anyone guide me through the procedure for HDD replacement. As there is one HDD is faulty in our rx6600 machine. We have already received the claimed part.

Is there any guideline/procedure for replacing the HDD in HP-UX 11iV3?

Re: HDD Replacement in HP-UX

Torsten. — Thu, 24 Mar 2011 04:57:40 GMT

This could be a bit complicated, depending if the disk is connected to the default SAS controller (as plain disk or in hardware RAID) or to a smartarray P400.

An "ioscan -fn" would be the first step to find this out.

Re: HDD Replacement in HP-UX

Ghazanfar_2 — Thu, 24 Mar 2011 06:18:26 GMT

Its a hardware RAID.

is there any need to umount the HDD before removing the faulty disk. Secondly, from HP-UX, how can we check the error counts and third, after umount and replacing the disk, how we mount and clear the error counts.

Re: HDD Replacement in HP-UX

Horia Chirculescu — Thu, 24 Mar 2011 06:28:17 GMT

Hello,

There is an HP document that covers this issue:

http://bizsupport2.austin.hp.com/bc/docs/support/SupportManual/c01911837/c01911837.pdf

Best regards,
Horia.

Re: HDD Replacement in HP-UX

Torsten. — Thu, 24 Mar 2011 06:37:13 GMT

In case of a hardware RAID (P400 or default controller?) you just replace the disk and check for rebuilt, that's all.

Re: HDD Replacement in HP-UX

Ghazanfar_2 — Thu, 24 Mar 2011 08:57:21 GMT

Thanks Horia & Torsten

Will get back to you after reading the document.

Re: HDD Replacement in HP-UX

Torsten. — Thu, 24 Mar 2011 11:42:18 GMT

The document "When_Good_Disks_Go_Bad_WP" (linked above) will not really help if the disk is mirrored by hardware. But the P400 or "HP 8 Internal Port SAS Controller User Guide" will - depending on hardware.

Re: HDD Replacement in HP-UX

Horia Chirculescu — Thu, 24 Mar 2011 12:07:53 GMT

Torsten is right about this.

You should interrogate the RAID controller in order to find out the requested information. From the HP-UX point of view, there is only one disk available (the one made by the RAID hardware).

Best regards
Horia.

Re: HDD Replacement in HP-UX

Horia Chirculescu — Thu, 24 Mar 2011 12:10:42 GMT

... and that disk would be in good shape as long as the RAID hardware would have enough good HDDs to re-constitute the information from the bad HDD.

Best regards
Horia.

Re: HDD Replacement in HP-UX

GPissutto — Fri, 25 Mar 2011 12:11:47 GMT

If you have a RAID controller, first of all, let's find out which one it is. Do:
# ll /dev/ciss*
# ll /dev/sas*

I would expect that only one of them you have (could be both but let's assume not by now).

To check the configuration:
# saconfig /dev/cissXX

or
# sasmgr get_info -D /dev/sasd0 -q phy=all
# sasmgr get_info -D /dev/sasd0 -q raid
# sasmgr get_info -D /dev/sasd0 -q lun=all

So now you could identify which one is your disk and then you could check what kind of RAID configuration is involved in. Just continue working with the man pages for other options.

Re: HDD Replacement in HP-UX

Ghazanfar_2 — Mon, 11 Apr 2011 07:46:39 GMT

Thanks to all.