[cisco-voip] RAID1 disk mirroring

[Lelio Fulgenzi]

with the old MCS servers, the disk array bios would warn you that you had a disk in slot A that was originally configured for slot B and it would give you the option to switch it. that would work with one disk, not sure if it would work with two input into the wrong slots. 

lesson learned: label your disks. ;) 

--- 
Lelio Fulgenzi, B.A. 
Senior Analyst (CCS) * University of Guelph * Guelph, Ontario N1G 2W1 
(519) 824-4120 x56354 (519) 767-1060 FAX (JNHN) 
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"Bad grammar makes me [sic]" - Tshirt 


----- Original Message ----- 
From: "Ryan Ratliff" <rratliff at cisco.com> 
To: "Jason Aarons (US)" <jason.aarons at us.didata.com> 
Cc: cisco-voip at puck.nether.net 
Sent: Friday, December 4, 2009 10:48:17 AM GMT -05:00 US/Canada Eastern 
Subject: Re: [cisco-voip] RAID1 disk mirroring 


The drive location is a function of the array controller not the OS (afaik). I've certainly killed drives with Windows on them by putting them in the wrong slot. 



-Ryan 


On Dec 4, 2009, at 10:31 AM, Jason Aarons (US) wrote: 



Am I correct in that mirroring behaved differently going from CCM4x/Windows 2000 to CCM6/xRedHat in that before you could boot off mirrored drive in either slot on MCS-7835/7845? 

It seems to me that the newer Platform is more picky about drive location in the raid array, etc. Not sure if it’s limitation of the Linux raid drivers , RHEL, etc. 



From: cisco-voip-bounces at puck.nether.net [mailto:cisco-voip-bounces at puck.nether.net] On Behalf Of Ryan Ratliff 
Sent: Friday, December 04, 2009 10:20 AM 
To: cips 
Cc: cisco-voip at puck.nether.net 
Subject: Re: [cisco-voip] RAID1 disk mirroring 

Not supported by HP or Cisco as cips stated. 



That said: 

1. The server definitely won't boot and I wouldn't expect either disk to be usable if you put them into the wrong slots. 

2. Depending on the raid controller settings on the second server and the hardware between both servers it could do anything from boot normally to corrupt both disks. 



I'd highly encourage you to test both scenarios with data on the hard disks you don't mind losing. 






-Ryan 



On Dec 4, 2009, at 7:16 AM, cips wrote: 






For Cisco MCS server this procedure is officially not supported… 



1. The system will boot from the primary disk 

2. In the new server the system will boot but you might have issues with (raid) drivers in the os 




From: cisco-voip-bounces at puck.nether.net [mailto:cisco-voip-bounces at puck.nether.net] On Behalf Of ifilxh 
Sent: vrijdag 4 december 2009 12:55 
To: cisco-voip at puck.nether.net 
Subject: [cisco-voip] RAID1 disk mirroring 



Our normal disk swap procedure is 
1. power off the server 
2. pull disk 1 out 
3. if upgrade fails, power off the server again, pull out disk 0, and put disk 1 back to the original tray, power on the server and then put disk 0 back to tray0 

Curious to know 
1. what is going to happen if I pull out both disks and swap the disks, disk1 goes to the slot0, disk0 goes to slot1 
1. what is going to happen if I pull out both disks and insert them to another server 

Thanks in advance. 
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