Cisco C Series Quick Start Manual

Also see for Profile Series: User guide Getting started guide Getting started guide Getting started guide User guide

ContentsIntroductionPrerequisitesComponents UsedConfigureIntroductionThis guide is inteded to show you how to configure 'Just a bunch of disks' (JBOD) on the Cisco12G SAS Modular RAID Controller in a C-Series server.Caveats:* JBOD disks are not able to take advantage of any hardware caching on the RAID controller.http://www.redbooks.ibm.com/redpapers/pdfs/redp5234.pdf (general documentation on RAID /JBOD)* If caching is required on these disks, then you can put them into a RAID 0 array (striping) andpresent this to the OS. Recall that RAID0 has no parity, so please note that the more disks addedto a RAID 0, the larger your failure domain, or the greater the chance of data loss across all disksdue to a single disk failure. This is the nature of RAID 0. Good performance, intolerant of even asingle disk failure. This is acceptable for some applications and use cases however.PrerequisitesC-Series ServerlCisco 12G SAS Modular Raid Controllerl1 or more HDDlAccess to CIMC / KVMlComponents UsedCisco C240-M4 running 2.0(6d) CIMClCisco 12G SAS Modular Raid Controller running 4.250.00-3632lConfigureAs a safety precaution, if you have a pre-existing RAID configuration, please back up the data onthat Virtual Disk (VD) prior to making these changes.If you have existing Virtual Disk (VD), RAID 1 for instance, that you wish to preserve, itsconfiguration should be preserved after enabling JBOD, though a reboot is required to enter thepre-boot RAID configuration menu (CTRL+R) to enable JBOD.

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