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using a PERC6/i (MegaRaid SAS 1078) in JBOD mode?

DISCUSSION Louis-David Mitterrand 4 participants 13 messages Oct 23, 2010 – Oct 25, 2010 SCSI

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Louis-David Mitterrand

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#0 lore raw

Hi,

On a Dell PowerEdge 2900 III I have a PERC6/i (MegaRaid SAS 1078). From the controller bios is seems I have to create a "raid0 virtual drive" for each physical disk or in order for them to appear in Linux.

As I intend to use none of that controller's raid features, is it at all possible to switch it to plain JBOD mode?

Thanks,

#1 lore raw

You need use LSI application to configure the JBOD before to use it.

-----Original Message-----
From: [email protected] [mailto:[email protected]] On Behalf Of Louis-David Mitterrand
Sent: Saturday, October 23, 2010 5:58 AM
To: [email protected]
Subject: using a PERC6/i (MegaRaid SAS 1078) in JBOD mode?

Hi,

On a Dell PowerEdge 2900 III I have a PERC6/i (MegaRaid SAS 1078). From the controller bios is seems I have to create a "raid0 virtual drive" for each physical disk or in order for them to appear in Linux.

As I intend to use none of that controller's raid features, is it at all possible to switch it to plain JBOD mode?

Thanks,
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author
#2 lore raw
Quoted 1 line · Bo

You need use LSI application to configure the JBOD before to use it.

Hi,

Could you tell me what LSI app do I need? Does it run under Linux?

Thanks,

#3 lore raw

Le Mon, 25 Oct 2010 15:19:37 +0200
Louis-David Mitterrand <[email protected]> écrivait:

Quoted 2 lines

Could you tell me what LSI app do I need? Does it run under Linux?

It's called MegaCli. Find it here :

http://www.lsi.com/storage_home/products_home/internal_raid/megaraid_sas/megaraid_sas_8888elp/index.html#Miscellaneous

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#4 lore raw
Quoted 10 lines · Emmanuel Florac

Le Mon, 25 Oct 2010 15:19:37 +0200
Louis-David Mitterrand <[email protected]> écrivait:

Quoted 2 lines

Could you tell me what LSI app do I need? Does it run under Linux?

It's called MegaCli. Find it here :

http://www.lsi.com/storage_home/products_home/internal_raid/megaraid_sas/megaraid_sas_8888elp/index.html#Miscellaneous

OK, I installed it and tried:

MegaCli64 -AdpSetProp -EnableJBOD -1 -aALL

but this seems to do nothing (maybe after reboot?), and

MegaCli64 -PDMakeJBOD -PhysDrv 0:0 -aAll

gives this error (tried most permutations):

Invalid input at or near token 0
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#5 lore raw

You also can use ctrl^H during the controller post to configure the JBOD.

-----Original Message-----
From: [email protected] [mailto:[email protected]] On Behalf Of Louis-David Mitterrand
Sent: Monday, October 25, 2010 9:57 AM
To: [email protected]
Subject: Re: using a PERC6/i (MegaRaid SAS 1078) in JBOD mode?

Quoted 10 lines · Emmanuel Florac

Le Mon, 25 Oct 2010 15:19:37 +0200
Louis-David Mitterrand <[email protected]> écrivait:

Quoted 2 lines

Could you tell me what LSI app do I need? Does it run under Linux?

It's called MegaCli. Find it here :

http://www.lsi.com/storage_home/products_home/internal_raid/megaraid_sas/megaraid_sas_8888elp/index.html#Miscellaneous

OK, I installed it and tried:

MegaCli64 -AdpSetProp -EnableJBOD -1 -aALL

but this seems to do nothing (maybe after reboot?), and

MegaCli64 -PDMakeJBOD -PhysDrv 0:0 -aAll

gives this error (tried most permutations):

Invalid input at or near token 0
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author
#6 lore raw
Quoted 1 line · Bo

You also can use ctrl^H during the controller post to configure the JBOD.

Unfortuntely I found no way to configure disks in JBOD mode through the adapter bios. A google search seems to indicate other users have the same problem.

Apparently a firmware change (to "initiator and target" mode) is required to turn that adapter's into a simple non-raid SATA controller but I couldn't find it anywhere.

Any idea?

#7 lore raw

Does the ctrl^H work for you?

-----Original Message-----
From: [email protected] [mailto:[email protected]] On Behalf Of Louis-David Mitterrand
Sent: Monday, October 25, 2010 10:09 AM
To: [email protected]
Subject: Re: using a PERC6/i (MegaRaid SAS 1078) in JBOD mode?

Quoted 1 line · Bo

You also can use ctrl^H during the controller post to configure the JBOD.

Unfortuntely I found no way to configure disks in JBOD mode through the adapter bios. A google search seems to indicate other users have the same problem.

Apparently a firmware change (to "initiator and target" mode) is required to turn that adapter's into a simple non-raid SATA controller but I couldn't find it anywhere.

Any idea?
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author
#8 lore raw
Quoted 2 lines · Bo

Does the ctrl^H work for you?

Oh, you mean Ctrl-H, not the usual Ctrl-R.

Is that a secret cheat code (like in Doom :-) ?

I'll try it a soon as my raid6 partition finishes resync'ing.

#9 lore raw

You are right. Ctrl-R for PERC... and ctrl-H for LSI.

-----Original Message-----
From: [email protected] [mailto:[email protected]] On Behalf Of Louis-David Mitterrand
Sent: Monday, October 25, 2010 10:26 AM
To: [email protected]
Subject: Re: using a PERC6/i (MegaRaid SAS 1078) in JBOD mode?

Quoted 2 lines · Bo

Does the ctrl^H work for you?

Oh, you mean Ctrl-H, not the usual Ctrl-R.

Is that a secret cheat code (like in Doom :-) ?

I'll try it a soon as my raid6 partition finishes resync'ing. --
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author
#10 lore raw
Quoted 1 line · Bo

You are right. Ctrl-R for PERC... and ctrl-H for LSI.

OK, I tried Ctrl-H during adapter post and nothing (apparently) happened.

However my syslog has:

	scsi2 : LSI SAS based MegaRAID driver
	Oct 25 14:48:27 grml kernel: [    1.956381] scsi 2:0:0:0: Direct-Access     ATA      Hitachi HDS72101 A70M PQ: 0 ANSI: 5

Does that "Direct-Access" mean I'm now in JBOD mode?

Quoted 23 lines

-----Original Message-----
From: [email protected] [mailto:[email protected]] On Behalf Of Louis-David Mitterrand
Sent: Monday, October 25, 2010 10:26 AM
To: [email protected]
Subject: Re: using a PERC6/i (MegaRaid SAS 1078) in JBOD mode?

Quoted 2 lines · Bo

Does the ctrl^H work for you?

Oh, you mean Ctrl-H, not the usual Ctrl-R.

Is that a secret cheat code (like in Doom :-) ?

I'll try it a soon as my raid6 partition finishes resync'ing. --
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#11 lore raw

Le Mon, 25 Oct 2010 17:01:46 +0200
Louis-David Mitterrand <[email protected]> écrivait:

Quoted 2 lines

Does that "Direct-Access" mean I'm now in JBOD mode?

Absolutely.

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                    |	<[email protected]>
                    |   +33 1 78 94 84 02
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#12 lore raw
In reply to Louis-David Mitterrand
Quoted 11 lines · Louis-David Mitterrand
Quoted 1 line · Bo

You also can use ctrl^H during the controller post to configure the JBOD.

Unfortuntely I found no way to configure disks in JBOD mode through the adapter bios. A google search seems to indicate other users have the same problem.

Apparently a firmware change (to "initiator and target" mode) is required to turn that adapter's into a simple non-raid SATA controller but I couldn't find it anywhere.

Bzzt. Nope.
IT firmware is for the 'plain' mptsas (LSI SAS 1078) only. PERC6/i is based upon the 'Megaraid' SAS 1078, which is using the same SAS chip but has an additional (hardware) RAID controller.

You cannot change the firmware here.

And yes, megacli is notoriously tricky to invoke.
It really needs to get used to.

Cheers,

Hannes

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Dr. Hannes Reinecke		      zSeries & Storage
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