I haven't experienced a failure of an HDA since the days the airline
only allowed VM to have 3380-A04 and -B04 devices that were
hand-me-downs from MVS and TPF. It took a week of 7 HDA failures during
the 5 day work week, all housing critical data, before they finally
bought new DASD for VM. I think most of the replacement HDAs were
cannibalized from devices sitting on the loading dock waiting for
someone to haul them away. One died less than an hour after we finished
a restore. No big deal, it only took 6.5 hours to do that restore..
Regards,
Richard Schuh
________________________________
From: The IBM z/VM Operating System
[mailto:ib...@listserv.uark.edu] On Behalf Of Dave Wade
Sent: Monday, March 09, 2009 4:27 PM
To: IBMVM@LISTSERV.UARK.EDU
Subject: Re: Must be Friday: Mainframe USBs!
I remember having a 3370 (I think) replaced on a 4331. The CE
said the reason the MAP ran for so many pages was that the Head and
Drive assembly (HDA) was the most expensive part of the drive, so the
Diagnostic floppy would exhaustively test every component before it
failed the Head and Drive Assembly. He was pretty sure it was the HDA
and arrived with one, which was left to acclimatize (I think it needed 4
hours) while he ran through the MAP.
Glorious days,
Dave Wade G4UGM
Illegitimi Non Carborundum
-----Original Message-----
From: The IBM z/VM Operating System
[mailto:ib...@listserv.uark.edu] On Behalf Of David Boyes
Sent: 09 March 2009 15:47
To: IBMVM@LISTSERV.UARK.EDU
Subject: Re: Must be Friday: Mainframe USBs!
The 308x had a FBA device for the support processor to use.
Wasn't customer accessible, though.
I remember helping a CE replace one once when it failed on a
3081D. Messy. The MAP ran for tens of pages.
On 3/9/09 11:42 AM, "Edward M Martin" <emar...@aultman.com>
wrote:
I believe that the 3090 or something similar.
It has been awhile since the CE and I talked about devices.
