Cisco Cisco UCS C22 M3 Rack Server Guia De Resolução De Problemas
Contents
Introduction
Prerequisites
Components Used
Configure
Introduction
This guide is inteded to show you how to configure 'Just a bunch of disks' (JBOD) on the Cisco
12G SAS Modular RAID Controller in a C-Series server.
12G 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.
JBOD)
* If caching is required on these disks, then you can put them into a RAID 0 array (striping) and
present this to the OS. Recall that RAID0 has no parity, so please note that the more disks added
to a RAID 0, the larger your failure domain, or the greater the chance of data loss across all disks
due to a single disk failure. This is the nature of RAID 0. Good performance, intolerant of even a
single disk failure. This is acceptable for some applications and use cases however.
present this to the OS. Recall that RAID0 has no parity, so please note that the more disks added
to a RAID 0, the larger your failure domain, or the greater the chance of data loss across all disks
due to a single disk failure. This is the nature of RAID 0. Good performance, intolerant of even a
single disk failure. This is acceptable for some applications and use cases however.
Prerequisites
C-Series Server
●
Cisco 12G SAS Modular Raid Controller
●
1 or more HDD
●
Access to CIMC / KVM
●
Components Used
Cisco C240-M4 running 2.0(6d) CIMC
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Cisco 12G SAS Modular Raid Controller running 4.250.00-3632
●
Configure
As a safety precaution, if you have a pre-existing RAID configuration, please back up the data on
that Virtual Disk (VD) prior to making these changes.
that Virtual Disk (VD) prior to making these changes.
If you have existing Virtual Disk (VD), RAID 1 for instance, that you wish to preserve, its
configuration should be preserved after enabling JBOD, though a reboot is required to enter the
pre-boot RAID configuration menu (CTRL+R) to enable JBOD.
configuration should be preserved after enabling JBOD, though a reboot is required to enter the
pre-boot RAID configuration menu (CTRL+R) to enable JBOD.