5. ICMP
ICMP location in the Ca rd Cage of a L-series projector.
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Image 5-5
5.2 ICMP HDD
About ICMP HDD
The three HDDs (local storage) in the ICMP, are set up in a RA ID 5 configuration. This storage technique, that combines multiple
HDD com ponents into a logical unit, manages enough redun dancy information to continue to operate properly after the loss of one
HDD.
Image 5-6
CAUTION: A RAID 5 configuration with three HDDs allows a maximum loss of one disk. With the simultaneous
loss of m ore than one HDDs, data is lost and the RAID must be completely initialized again after replacement
of the defect HDDs w ith new HDDs!
About degraded mode
When a RAID array experiences the failure of one disk, it enters in degraded mode. Content storage and playback remains available
on the ICMP.
CAUTION: The loss of one disk causes no serious consequences on the ICMP. But action must be taken
quickly because the loss of a second disk will make the RAID system broken. The main cause of the total loss
of RAID is due in most cases to t he loss of the secon d disk w hile the first has not been rebuilt!
A failed drive should b e replaced as soon as possible.
About “RAID recovery” process
The restoration from degr aded to normal condition of the RAID 5 system is done autom atically. When the RA ID controller detects a
new HDD to replace the failed dis
k the recovery procedure starts automatically.
CAUTION: The automatic process d oes not w ork if m ore than one disk is lost. In that case the RAID must be
completely initialized again!
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