Re: Model 170 DASD

We tried but it wasn't available/usable. Guess I had the "el-cheapo" disk
cage....

From an IBM RedBook re: "Builder Updates"

DASD Concurrent Maintenance Cage
The #7133 is a DASD six disk cage for the Model 270. The #7133 enables disk
unit concurrent maintenance and replaces
the standard base non-concurrent maintenance DASD six disk cage.


-----Original Message-----
From: midrange-l-bounces@xxxxxxxxxxxx
[mailto:midrange-l-bounces@xxxxxxxxxxxx] On Behalf Of Sue Baker
Sent: Friday, March 15, 2013 1:10 PM
To: Midrange Systems Technical Discussion
Subject: Re: Model 170 DASD

On 3/15/2013 1:22 PM, Roger Harman wrote:

On the 270's, I know it was model/feature dependent. I had a 270-2248
and concurrent maintenance was not an option.

Concurrent maintenance on disk units has been available since before the
"black boxes" that were introduced in 1995.

If I remember correctly, it came about with V2R3 of OS/400.
Unfortunately, it took almost 10 years before most CEs were willing to
actually do concurrent maintenance on disk units.

--
Sue Baker
IBM Americas ATS - Power Systems
Rochester, MN

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