Joe,
You are not SOL if D01 dies, only if it Dies and then you power off the
system before you replace it. D01 (like all the others) can be
concurrently replaced and rebuilt with no loss of data or uptime. The
'Gotcha' is that if D01 is dead and you power down you cannot IPL from
that drive because it's dead. Unless they've beefed up the logic in the
RAID cards significantly then you would be stuck with a System reload at
that point.
As a matter of practice we NEVER recommend powering down a system with
ANY failed drives no matter which one it is unless that's the Only way to
replace the drive. (Many older systems in the bottom end 270 and previous
had this restriction.)
As to Mirroring your Load Source rather than RAID you can do that but it
likely would require a reload. I can't swizzle out a routine that would
let you start Mirroring on only the LS and it's mirror without mirroring
all the rest of the drives. You'd have to resstore the LIC to just one
drive, then add one more dirve to the system and start Mirroring. Once
that's done then start RAID and after that add those four drives back in.
Then complete the reload.
I don't think it's worth it.
- Larry
Vice President IBM Certified Systems Expert:
Arbor Solutions, Inc. System i Technical Design and
Implementation V5R4
1345 Monroe NW Suite 259 eServer i5 iSeries LPAR Technical
Solutions, V5R3
Grand Rapids, MI 49505 IBM Certified Specialist
System i Integration with BladeCenter
and System x V1
(616) 451-2500 System i IT Simplification: Linux
Technical V5R4
(616) 451-2571 - Fax iSeries System Administrator for OS/400
V5R3
(616) 260-4746 - Cell
If you can read this, thank a teacher....and since it's in English,
thank a soldier.
Joe Pluta <joepluta@xxxxxxxxxxxxxxxxx>
Sent by: midrange-l-bounces@xxxxxxxxxxxx
06/16/2008 12:08 PM
Please respond to
Midrange Systems Technical Discussion <midrange-l@xxxxxxxxxxxx>
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Subject
Re: load source concurrent maintenance
Thanks as always, Rob.
So I have this:
System Unit 9406-270 FR01
Backplane 283E P19 DB1
Disk Unit * 6718-074 P06 D01
Disk Unit 6718-074 P08 D02
Disk Unit 6718-074 P11 D03
Disk Unit 6718-074 P10 D04
Disk Unit 6718-070 P09 D05
Disk Unit 6718-070 P20 D06
That's six drives in a RAID set. Works nicely, everybody is happy. But
from the way I read Larry's statement, if D01 goes, I'm SOL. Is the
better option to somehow mirror two of them for the load source and then
put the other four in a RAID set? I'd lose one drive of effective
space, or 20% of my total. And can this even be done without some
serious hoop jumping (i.e. reloading the system)?
Joe
STRSST
1. Start a service tool
7. Hardware service manager
1. Packaging hardware resources (systems, frames, cards,...)
9=Hardware contained within package (On various items until you see
something like)
Type- Resource
Description Model Name Location
Disk Expansion Unit 5787-001 FR10
Backplane 505C P144 P1
Disk Unit * 4328-070 P60 P1-D1
...
* - Indicates that this packaging hardware resource is the
load source disk unit or the IOP that the disk unit is
attached to.
Rob Berendt
midrange.com
