Re: RAID card replacement

[DrFranken <midrange@xxxxxxxxxxxx>]

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