Re: RAID card replacement -- MIDRANGE-L

Wait, did the disks appear as DD00X or DPH00X? if DPH, they were part
of a raid set and you MUST initialize first before being able to use
them.

Best Regards,

On Tue, Feb 19, 2013 at 12:41 PM, Clay B Carley <cbc@xxxxxxxxx> wrote:

Hi DrFranken,

This is the only battery that I found on the 2741 card:
http://carleynet.net/familypictures/albums/album70/2013_02_09_15_29_13_189.sized.jpg

Yes, by first slot, I meant L01. When attempting to configure any of
the other disks, I get something like "Disk is Read/Write Protected". I
may have come across an error message of some sort as well; googling the
error I came across some IBM doc that mentioned I could only use the
disk in slot L01, especially since this was a "new" install with the
battery already being dead. I'll see if I can find that info again...

Everything else checks out that you mentioned. All of the drives do
actually show up in the service tools; and they are all of the same
model (no non-IBM drives). That "Read/Write Protected" message really
had me scratching my head the other day though.

Thanks!
Clay Carley

DrFranken wrote:

Clay,
The battery that usually fails is not soldered to the board it's
removable and replaceable (and cheap too!) However there is another
battery there that could have failed (a small 'button' battery)

Nonetheless the 2748 is a straight up replacement. Simply do a clean
pwrdwnsys, pull the power plug(s) and swap the cards. The 2748 is a bit
quicker as well.

I am curious about your comment about using only the disks in the first
slot. If by this you mean L01 only then there is a problem with the disk
backplane in there. All four slots L01-L04 would be active with ANY of
the supported RAID cards in that machine. If you are referring to the 6
slots over on the right side (assuming the presence of the expansion
chassis) then that's almost certainly a cabling issue. When that 'side
car' is attached a SCSI cable is routed through to the left side and
connected to the second port (counting from the rear) of the RAID card.
If that cable isn't there, no drives. Also of course there is a power
supply in the side car that must be plugged in as well. I have
encountered a few folks that thought it was a redundant power supply and
not plugged it in.

I have also seen some folks load up NON AS/400 drives in there 'because
they fit'. They won't work but report in as an unidentified SCSI device.

- Larry "DrFranken" Bolhuis

www.frankeni.com
www.iDevCloud.com
www.iInTheCloud.com

On 2/19/2013 9:41 AM, Clay B Carley wrote:

Hi all,

Due to the battery being dead on my 2741 RAID card in the old 170
system, I've ordered a replacement card, a model 2748.

The 2741 didn't allow me to use any disk but what was in the first slot,
in addition to potentially being slow because of the dead battery. I
would replace the battery on the card, but it's welded/soldered to it.
I'd rather have a replacement card before attempting to de-solder &
re-solder a new battery & holder to it.

Are there any potential issues to this swap? I've been impressed with
the system's ability to quickly & easily roll with hardware changes to
this point, but this surgery is a little deeper than what I've done to
it so far.

Thanks,
Clay Carley

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