[cisco-voip] Break Mirror on HP MCS

[Wes Sisk]

Just for a bit of context - while you can frequently get away with it  
on the windows train, so far linux and 5.x has been much less  
forgiving on hard powerdowns.

/Wes

On Nov 3, 2006, at 4:18 PM, Klaczko, Edwin wrote:

Thanks for the info, it was very helpful.







Eddie Klaczko

IP Telephony / Network Specialist

CC Schaumburg School District 54

eklaczko at sd54.org

From: Voll, Scott [mailto:Scott.Voll at wesd.org]
Sent: Friday, November 03, 2006 2:46 PM
To: Klaczko, Edwin; cisco-voip at puck.nether.net
Subject: RE: [cisco-voip] Break Mirror on HP MCS



Slot 0 is the drive to remove. And no the replacement drive does not  
need to be blank.  I only have a couple extra drives so I just reuse  
them over and over again with out issue.



Scott



From: cisco-voip-bounces at puck.nether.net [mailto:cisco-voip- 
bounces at puck.nether.net] On Behalf Of Klaczko, Edwin
Sent: Friday, November 03, 2006 9:13 AM
To: cisco-voip at puck.nether.net
Subject: Re: [cisco-voip] Break Mirror on HP MCS



Sounds like a little of each.  Thanks to everyone for their input it  
was helpful.  I have another question.  For RAID 1 does it matter  
which slot I put the spare drive into?  Ex.  I pull a drive from slot  
1 and keep as emergency backup.  Insert a spare and have it rebuild  
(does it need to be blank or can it have old data?).  Perform upgrade  
and system has problems so I want to go back.  If I pull both drives  
out and insert the emergency backup into slot 0 and powerup the  
server this is no problem correct?  Or do I need to put the emergency  
into slot 1 power up and then insert another into slot 0 to rebuild  
the mirror.  I think there are a couple questions in there somewhere.







Eddie Klaczko

IP Telephony / Network Specialist

CC Schaumburg School District 54

eklaczko at sd54.org

From: cisco-voip-bounces at puck.nether.net [mailto:cisco-voip- 
bounces at puck.nether.net] On Behalf Of Keith Klevenski
Sent: Friday, November 03, 2006 10:13 AM
To: Jason Aarons (US); cisco-voip at puck.nether.net
Subject: Re: [cisco-voip] Break Mirror on HP MCS



I’ve always just pulled the drive and put in a spare and let it  
rebuild on our ancient 7835’s.  good info here tho.



From: cisco-voip-bounces at puck.nether.net [mailto:cisco-voip- 
bounces at puck.nether.net] On Behalf Of Jason Aarons (US)
Sent: Friday, November 03, 2006 10:03 AM
To: cisco-voip at puck.nether.net
Subject: Re: [cisco-voip] Break Mirror on HP MCS



You can’t pull a SATA drive in a MCS-7825 hot, but I’ve pulled many  
SCSI drives from DL-380s hot. The Event Viewer logs do a great job of  
showing what’s happening with the SCSI controller and the raid re- 
builds.  A 36GB drive takes almost exactly 45 minutes to re-build,  
it’s all done in Compaq hardware versus software.  Sure if you could  
power it off that would be recommend, but I’ve seen a few sites with  
single MCS-7835 and had to break the raid mirror couple days before a  
upgrade and powering down wasn’t a option.



Would you pull a 6724 or NAM or IDS module in/out of a 6509 hot?   
Some would say sure, others have lost switches on “hot-swappable” parts!



I know the IBM x440s we had you could replace CPUs and RAM hot in  
production, only thing you couldn’t swap hot was the motherboard!  
24x7x365 non-stop computing!

From: cisco-voip-bounces at puck.nether.net [mailto:cisco-voip- 
bounces at puck.nether.net] On Behalf Of Voll, Scott
Sent: Friday, November 03, 2006 10:48 AM
To: Klaczko, Edwin; cisco-voip at puck.nether.net
Subject: Re: [cisco-voip] Break Mirror on HP MCS



I always shut down the Server…. Pull the drive…. Power up the  
server…. Then put in the new drive.



I have never pulled a drive in use.  Probably not the best option.



Scott



From: cisco-voip-bounces at puck.nether.net [mailto:cisco-voip- 
bounces at puck.nether.net] On Behalf Of Klaczko, Edwin
Sent: Friday, November 03, 2006 6:17 AM
To: cisco-voip at puck.nether.net
Subject: [cisco-voip] Break Mirror on HP MCS



I’ve ordered some spare HDs and wanted to use them to keep an extra  
backup.  I’m used to working with Dell servers and had a bad  
experience pulling a hot-swap drive live.  Their RAID controller  
allows you to power down a drive to remove it.  I couldn’t find a  
similar feature on the HP interface.  Is this necessary or is it safe  
just to pull the drive live.  Any help would be appreciated.





Eddie Klaczko

IP Telephony / Network Specialist

CC Schaumburg School District 54

eklaczko at sd54.org





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