RE: Extra Disk 170

Correct me if I'm wrong but isn't there an expansion unit available from
IBM (or reseller) that will allow you to expand a  170 from the standard
4 drives to 10 and do so in a supported fashion?


-----Original Message-----
From: midrange-l-bounces@xxxxxxxxxxxx
[mailto:midrange-l-bounces@xxxxxxxxxxxx] On Behalf Of Larry Bolhuis
Sent: Wednesday, April 06, 2005 6:45 PM
To: Midrange Systems Technical Discussion
Subject: Re: Extra Disk 170


I speak as somewhat of an authority on what a 170 will accept as disks, 
check out http://www.frankenseries.com/gallery-frankentower.html for 
pictures!

The 170 will work with 2, 4, 8, and 17 GB disks. Essentially any of the 
double byte (68 pin) style of drives (7200 RPM)  as well as the 10K RPM 
8 and 17GB units. Heck I just bet it would work with the 10K RPM 35GB 
Units but that would be unsupported now wouldn't it?? Depending on how 
far back your OS is you MIGHT run into a problem with the 17GB units but

I doubt it.

As to how to use them, if you have only two you likely have them running

naked (i.e. no disk protection).  I would strongly recommend you add a 
pair of 8GB units and then crank up mirroring. This would move you from 
8 GB unprotected to 12 GB mirrored and doesn't care about which 
controller you have.  Of course you can (at your own risk and peril) run

the new 8GB units unprotected too and in that case end up with 24 GB of 
disk.

You don't say which disk controller you have but if you have only two 
drives I suspect strongly that you have only the base controller, not 
the 2740, 41, 26 or 48 any of which would get you RAID capability.  In 
that case you'd need to add only 4GB disks anyway to get to the minimum 
RAID set size of 4 units.

Hope this helps!

  - Larry (aka DrFranken)

You can

Raul A. Jager W. wrote:

> We have a 170 with 2 6807 disks (4.19 GB) and we want to add 2 6817
> disks (8 GB), is it possible to mix?
> if not, we can replace the disks, but I will like to know if the 170 
> will recognize the 6817 disk?
>
> TIA
> Raul
>

-- 
Larry Bolhuis                   IBM eServer Certified Systems Expert:
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