[cisco-voip] Monitoring C260 LSI Megaraid

[Matthew Ballard]

It’s the nature of RAID 5, RAID 5 provides one drive’s worth of parity for protection.  If one drive is lost, no data is lost and it continues to run (albeit at reduced performance in general).

If a second drive is lost, the entire volume of data is lost.

RAID 6 (if supported) adds a second parity worth of space, albeit with reduced write performance (due to additional overhead in work as the controller has to perform twice as much parity calculations), and an additional drive lost in terms of space.

RAID 50 can also add an additional drive’s worth of redundancy (in a different way) without the performance hit, but also doesn’t appear to be in the reference specs with 8 drives.

These are just standard issues when making decisions about servers, although I can’t speak to Cisco’s decisions, but I would guess the lack of RAID 6 support is due to the performance hit.

Matthew Ballard
Network Manager
Otis College of Art and Design
mballard at otis.edu<mailto:mballard at otis.edu>


From: cisco-voip [mailto:cisco-voip-bounces at puck.nether.net] On Behalf Of Jason Aarons (AM)
Sent: Monday, February 24, 2014 12:13 PM
To: cisco-voip at puck.nether.net
Subject: Re: [cisco-voip] Monitoring C260 LSI Megaraid

C210 M1 with MegaRAID SAS 9261-8i RAID controller setup with Raid 5 group.   Seems if you lose 2 out of 8 drives in that Raid5 Virtual Machine Datastore setup than ESXi seems to come to a stop.

How come?

From: cisco-voip [mailto:cisco-voip-bounces at puck.nether.net] On Behalf Of Jason Aarons (AM)
Sent: Monday, February 24, 2014 2:06 PM
To: cisco-voip at puck.nether.net<mailto:cisco-voip at puck.nether.net>
Subject: [cisco-voip] Monitoring C260 LSI Megaraid


what are my options for monitoring lsi megaraid hardware RAID array on a C260?

can I send SNMP traps from the CIMC?

would be vcenter warn me?

any issues with configuring spare drive in drive groups?

Sent from my Verizon Wireless 4G LTE Smartphone


itevomcid
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