Re: OT 7025-F50 again
- From: "Basil Holloway" <farl7FAKE@xxxxxxxxxxx>
- Date: Mon, 15 Dec 2008 00:06:12 GMT
<ekblaw@xxxxxxxxxxxx> wrote in message
news:67553500-7f5d-4d0d-8b28-f58e183ea91b@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
On Dec 13, 7:26 pm, "Basil Holloway" <farl7F...@xxxxxxxxxxx> wrote:
One strange thing happens when I reload mksysb it always says there is
not
enough room on the two main disks in the first bay so I replaced these
4.1gb
disks with 8.6gb disks but it made no difference. On the install options
screen it allways randomly selects two more disks from the 12 int the 2nd
and 3rd bays.
Your AIX 5.2 system install is clearly a lot larger than my AIX 4.3.3
install, which will fit on a single 4.5GB hard drive (but needs a
9.1GB hard drive so there's enough space on rootvg for the maintenance
level 11 updates and my usual mix of program products). I'm assuming
that your SSA drives are also 9.1GB, so you'd need a 36.4GB SCSI drive
to put your system install on a single drive. I agree that it is best
to keep rootvg on your SCSI drive(s), I set up each set of 6 SSA
drives as a 5-drive SSA array (yielding 36.4 of usable space with
9.1GB drives) plus a hot spare. You can even do this when all 3 drive
bays are filled with SSA drives, you simply need to use one of the
upper media bays for a large SCSI disk - in a configuration like this,
you'd have from left to right: SCSI hard drive, tape drive, CD-ROM
drive, floppy drive.
Rick Ekblaw
Rick appreciate your suggestions but unfortunately I cannot get to first
base to try them.
I think ( a guess really ) the IBM 160 SSA RAID adapter is stuffing up the
system so I wanted to take it out and all the SSA disks which are attatched
to it and see if my planar has had it, or more specifically the NVRAM chip.
As you know the 12 SSA disks are attatched to the backplanes in bay 2 and 3
and have been wired through to the IBM 160 only being connected to A1 and A2
ie all on a single loop.
I have tried to understand the set up from F50's manual which leads me to
believe some of the wiring has to be taken out particularly the yellow and
black stuff which seems to connect to the power supply also. On the F50
there is not much room between the backplanes and the separating wall to the
planar section. It is a jumbled mass of SSA wires, power wires and SCSI
cables. The IBM 160 SSA RAIS manual does not help me either. Manuals refer
one to SC23-2204-02 Problem Solving Guide but cannot find a copy on the web.
Basically Rick do you think it would be okay just to uninstall the IBM 160
SSA Raid adapter and the 12 SSA disks leaving all the wiring alone.
Take the planar battery out for the obligatory 30 minutes and fire up F50
with AIX 5.2 bos cd 1/7 and my mksysb tape in rmt0 and reinstall it to see
if the planar will hold all and do a cold restart which I cannot do at the
moment.
Thanks
Basil
.
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