|
In that case, would there be a difference in performance between a
2780 and a 5780 (the single card vs the card+cache) in a mirroring
situation? would the system use the additional cache?
Best Regards,
Roberto
On Sun, Jan 27, 2013 at 2:32 PM, DrFranken <midrange@xxxxxxxxxxxx> wrote:
Agreed that on these older machines using Mirroring is a great idea
because it does get you better disk protection. With older drives being
more likely to fail better protection is a good idea and Hot Spare isn't
supported on this hardware or software level. Mirroring mostly means you
are less likely to lose the system when more than one drive fails.
However write cache is just as important for Mirroring as well and the
O/S will use whatever it can find!
- Larry "DrFranken" Bolhuis
www.frankeni.com
www.iDevCloud.com
www.iInTheCloud.com
On 1/27/2013 10:32 AM, Roberto José Etcheverry Romero wrote:
If space is not the matter i would not enable raid but mirroring for--
protection. I believe the cache is not so important when mirroring...
Best Regards
On Sat, Jan 26, 2013 at 11:48 AM, DrFranken <midrange@xxxxxxxxxxxx> wrote:
Clay,
A dead battery will not cause failure or make you reload the thing. It
WILL cause it to run much more slowly during disk I/O however. Once you
replace it, performance (such that it is on a 170) will return.
- Larry "DrFranken" Bolhuis
www.frankeni.com
www.iDevCloud.com
www.iInTheCloud.com
On 1/26/2013 12:04 AM, Clay Carley wrote:
*This message was transferred with a trial version of CommuniGate(r) Pro*--
Hi DrFranken,
Thanks for the info! I'll be tearing into the system again tomorrow
hopefully.
I am pleased to announce, however, that I finally see output on the
twinax console! Looks like V5R2 is the way it's going, and I'm
incredibly stoked as it is initializing it's disks right now. I guess
it's moot if the RAID card battery is dead; but that's OK as I'm
definitely a step forward at this point.
Clay
On 01/25/2013 08:27 PM, DrFranken wrote:
Clay,
Pictures are worth a thousand words! Looking at those I can see there
are Eight disk units in there. This means that the system has a RAID
card. There is no way to configure that machine with more than 4 drives
without adding a RAID card. It's VERY likely that the battery on that
RAID card is failed. If you take the card out and bring the battery to
Batteries Plus (or whatever is in your neighborhood) you can usually get
a replacement for under $20. I would certainly do that before I began a
recovery. The RAID card will be on the side with the control panel and
the 4 drive cage. The slot it is in is mandatory so put it back where
you find it. :-)
So that you know the Load Source disk unit is the disk immediately below
the CD Drive on that side. Placement of the rest of the disk units does
not matter they will be found at IPL and recognized by their serial
numbers.
- Larry "DrFranken" Bolhuis
www.frankeni.com
www.iDevCloud.com
www.iInTheCloud.com
On 1/25/2013 4:28 PM, Clay B Carley wrote:
*This message was transferred with a trial version of CommuniGate(r)
Pro*
I want to thank everyone again for their assistance. I'm working on the
system now when time allows; and just in case, I found a 10 foot twinax
cable on ebay today & ordered it to eliminate the possibility of the
baluns being bad.
Another question; during an IPL D-M, will the system attempt to read the
optical drive more than once? I see codes changing on the panel, and
they cycle back to the same one they started with after a while, but
only see the optical drive flicker a couple of times after it powers up.
I did get my webserver back up and running, for anyone who is curious I
have photos here:
http://carleynet.net/familypictures/view_album.php?set_albumName=album70
Thanks again,
Clay Carley
rob@xxxxxxxxx wrote:
I wouldn't doubt IBM has someplace for that. I am thinking things like
system password and whatnot... Chips are cheap. But I see where you're
going at. And if it's per lpar, couldn't that be 254 * a maximum of
1,000
lpars?
Rob Berendt
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