Managing Raid Disks On A C-Series Platform; C-Series Platform Data Storage; Chapter 8 Managing Raid Disks On A C-Series Platform - Juniper C2000 Hardware Manual

Chapter 8
Managing RAID Disks on a C-series
Platform

C-series Platform Data Storage

This chapter describes how to manage and view status information for RAID disks
on a C-series platform. Topics include:
C-series Platform Data Storage
Managing Disks in a C-series Platform
A C-series platform provides data redundancy by supplying two hard drives (or disks)
in a redundant array of independent disks (RAID). Both disks are configured as a
RAID-1 mirror; this means that data is concurrently written to both disks. If one disk
becomes inoperable, the remaining disk continues to be active, which allows the
C-series platform to continue to function.
When you replace a faulty disk and initialize it, or disable and then enable a disk,
the RAID controller copies all the data from the active disk to the enabled or initialized
disk and establishes mirroring for the two disks.
The location of the disk mount for the disks depends on the model of the C-series
platform:
C2000 system—Front of chassis
C4000 system—Back of chassis
When you access the disks in the disk mount:
Disk 0 is to the left.
Disk 1 is to the right.
You can also use the request disk identify command to make the LED for a specified
disk blink to verify which disk is disk 0 and which is disk 1.
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C-series Platform Data Storage
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