From: Maguire, James (James.Maguire@OGS.STATE.NY.US)
Date: Tue Dec 30 2003 - 13:29:15 EST
Well, they tell me that having these 2 disks non-mirrored is ok. Would I go
through the PCI SCSI Disk Array Manager and create a second array (non
-raid) on the same adapter? Would this damage/remove/overwrite the existing
array?
-----Original Message-----
From: Hass, Harold [mailto:HHass@CO.FRESNO.CA.US]
Sent: Tuesday, December 30, 2003 1:17 PM
To: aix-l@Princeton.EDU
Subject: Re: New disks in 7026
JIm,
Nope, you need a minimum of 3 disks to make a RAID-5 array. That's a
function of how RAID-5 works. But you can use them as mirrored (RAID-1) and
use the result as a single disk, or go with 2 non-RAIDed disks.
Harold
-----Original Message-----
From: IBM AIX Discussion List [mailto:aix-l@Princeton.EDU]On Behalf Of
Maguire, James
Sent: Tuesday, December 30, 2003 10:04 AM
To: aix-l@Princeton.EDU
Subject: Re: New disks in 7026
Would I (can I?) create a second array with these two disks? The existing
disks (36 GB drives) and these 2 (73 GB drives) are all in the same 2104
unit. I see the option for creating another array, but I don't want to
screw up the existing array. Thanks again for your input.
Jim
-----Original Message-----
From: Hass, Harold [mailto:HHass@CO.FRESNO.CA.US]
Sent: Tuesday, December 30, 2003 12:15 PM
To: aix-l@Princeton.EDU
Subject: Re: New disks in 7026
Jim,
I'd really LIKE to be wrong!
If you're just looking for the additional space in a couple of vg's, you
should be able to make the disks pdisks and add them to the volume groups.
But that would mean you would have your existing RAID 5 array, and a
non-redundant disk in the vg. Gets you the space, but not the redundancy.
My experiences with IBM array controllers is primarily with SSA, so I
welcome any responces to this thread that point out errors in my
understanding.
And yes, that's a good thing to be scared of!
Harold
-----Original Message-----
From: IBM AIX Discussion List [mailto:aix-l@Princeton.EDU]On Behalf Of
Maguire, James
Sent: Tuesday, December 30, 2003 8:58 AM
To: aix-l@Princeton.EDU
Subject: Re: New disks in 7026
Harold,
I sure HOPE you are wrong, but I am having trouble. I can add the disks as
hot spares, change them to spares, but I don't seem to be able to add them
to the array. All I want to do is add one disk each to 2 existing volume
groups. I'm not really supposed to be even supporting this box, and I
certainly don't feel like blowing the array away and recreating it. Kind of
scares the hell out of me...
Thanks
Jim
-----Original Message-----
From: Hass, Harold [mailto:HHass@CO.FRESNO.CA.US]
Sent: Tuesday, December 30, 2003 11:44 AM
To: aix-l@Princeton.EDU
Subject: Re: New disks in 7026
Jim,
I could be wrong (it happens a lot!) but I do not think you are going to do
what it sounds like you want to do. I've never been able to add disks to an
existing array. I can create spare drives, or create an additional array
(if the particular array controller supports multiple arrays) or use the
drives as non-array drives, but not add to an existing array.
It seems logical you should be able to add the drives to expand an array,
but the only docs I found said to backup to tape, destroy the array, rebuild
with new drives included, restore data. Wish I had a better way.
If I am wrong, I'd be happy to be enlightened.
Harold
-----Original Message-----
From: IBM AIX Discussion List [mailto:aix-l@Princeton.EDU]On Behalf Of
Maguire, James
Sent: Tuesday, December 30, 2003 8:20 AM
To: aix-l@Princeton.EDU
Subject: Re: New disks in 7026
Robert,
Here's what I get following your hint...It looks like that's the trick,
because it does see them. I suppose I will CAUTIOUSLY add them to the
existing array. They then show up in the ADD HOT SPARE option. I am
assuming once I do that I can assign them to volume groups, etc. in the
usual way?
Thanks!
Jim
hdisk2 Available Raid 1 20-58-00-0,0 34715 MB Status OPTIMAL
hdisk2 10 Channel 1 ID 0 ONLINE - 34715Meg
hdisk2 28 Channel 2 ID 8 ONLINE - 34715Meg
hdisk3 Available Raid 1 20-58-00-1,0 34715 MB Status OPTIMAL
hdisk3 11 Channel 1 ID 1 ONLINE - 34715Meg
hdisk3 29 Channel 2 ID 9 ONLINE - 34715Meg
hdisk4 Available Raid 1 20-58-00-2,0 34715 MB Status OPTIMAL
hdisk4 12 Channel 1 ID 2 ONLINE - 34715Meg
hdisk4 2A Channel 2 ID A ONLINE - 34715Meg
hdisk5 Available Raid 0 20-58-00-3,0 34715 MB Status OPTIMAL
hdisk5 13 Channel 1 ID 3 ONLINE - 34715Meg
hdisk6 Available Raid 0 20-58-00-4,0 34715 MB Status OPTIMAL
hdisk6 14 Channel 1 ID 4 ONLINE - 34715Meg
hdisk7 Available Raid 0 20-58-00-5,0 34715 MB Status OPTIMAL
hdisk7 2B Channel 2 ID B ONLINE - 34715Meg
hdisk8 Available Raid 0 20-58-00-6,0 34715 MB Status OPTIMAL
hdisk8 2C Channel 2 ID C ONLINE - 34715Meg
15 SPARE on Channel 1 ID 5 - 70007Meg
2D SPARE on Channel 2 ID D - 70007Meg
-----Original Message-----
From: Robert Miller [ mailto:rmiller@SMUD.ORG <mailto:rmiller@SMUD.ORG> ]
Sent: Tuesday, December 30, 2003 11:00 AM
To: aix-l@Princeton.EDU
Subject: Re: New disks in 7026
I have this same hardware setup - try looking in smitty devices -> Disk
Array -> IBM PCI SCSI Disk Array -> PCI SCSI Disk Array Manager, you might
find some useful stuff in there.
Once you plug in the drives I *think* the green light should light up on
them (may not till you configure them), and with the Disk Array menus you
should be able to add them to your current array (or create a new one,
though I'm not sure if that adapter will support more than one array...). I
remember scratching my head over this till I found those menus...
HTH...
--rm
-----Original Message-----
From: IBM AIX Discussion List [ mailto:aix-l@Princeton.EDU
<mailto:aix-l@Princeton.EDU> ]On Behalf Of Patrick B. O'Brien
Sent: Tuesday, December 30, 2003 7:48 AM
To: aix-l@Princeton.EDU
Subject: Re: New disks in 7026
Can you hear the drives spinning up or do you see a green LED on these
drives?
You may have to provide AIX with additional drivers. Doing a cfgmgr -v may
show you AIX is looking for drivers or some other clue.
-----Original Message-----
From: Maguire, James [ mailto:James.Maguire@OGS.STATE.NY.US
<mailto:James.Maguire@OGS.STATE.NY.US> ]
Sent: Tuesday, December 30, 2003 7:44 AM
To: aix-l@Princeton.EDU
Subject: Re: New disks in 7026
Yes they are scsi. They are mounted in a 2104-DU3 expandable storage unit.
(I'm just reading the specs here, I'm never dealt with this unit before)
Thanks,
Jim
-----Original Message-----
From: John Jolet [ mailto:john.jolet@FXFN.COM <mailto:john.jolet@FXFN.COM> ]
Sent: Tuesday, December 30, 2003 10:23 AM
To: aix-l@Princeton.EDU
Subject: Re: New disks in 7026
i'm not familiar with that drive module...are these scsi disks?
-----Original Message-----
From: IBM AIX Discussion List [ mailto:aix-l@Princeton.EDU
<mailto:aix-l@Princeton.EDU> ]On Behalf Of Maguire, James
Sent: Tuesday, December 30, 2003 8:56 AM
To: aix-l@Princeton.EDU
Subject: Re: New disks in 7026
John,
I have never dealt with this machine before, (only worked with F50's), but
these go into a 2104 drive module. They don't show up at all. There were 8
disks in it already, and these are the 9th and 10th.
Thanks
Jim
-----Original Message-----
From: John Jolet [ mailto:john.jolet@FXFN.COM <mailto:john.jolet@FXFN.COM> ]
Sent: Tuesday, December 30, 2003 9:42 AM
To: aix-l@Princeton.EDU
Subject: Re: New disks in 7026
You don't say whether they were hotpluggable disks or not, so we'll assume
they were. after you inserted the drives, did you get power back to the
drive slots? You might check and see if they show up, but as defined, not
available.
-----Original Message-----
From: IBM AIX Discussion List [ mailto:aix-l@Princeton.EDU
<mailto:aix-l@Princeton.EDU> ]On Behalf Of Maguire, James
Sent: Tuesday, December 30, 2003 7:38 AM
To: aix-l@Princeton.EDU
Subject: New disks in 7026
Hello list. I just received two 73gb drives for a 7026-B80. I put them in
place yesterday, and thought they would become available by running cfgmgr,
but they do not appear. So, I scheduled a reboot last night hoping that
would take care of it, but still no luck. In looking at the Installation
instructions it appears that it might need a power off/ power on. Is there
any way around that?
Thanks,
Jim
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