8. ICMP
8.2 ICM P H DD
About ICMP HDD
The three HDDs (local storage) in the ICMP, a re set up in a RA ID 5 configuration. This storage technique, that combines m ultiple
HDD components into a logical unit, mana ges enough redundancy information to continue to operate properly after the loss of one
HDD.
Image 8-5
CAUTION: A RAID 5 configuration with three HDDs allows a maximum loss of one disk. With the si
multaneous
loss of more than one HDDs, data is lost and the RAID must be completely initialized again after replacement
of the defect HDDs with new HDDs!
About degraded mode
When a RAID array experiences the failure of one disk, it enters in degraded mode. C ontent storage and playback remains available
on the ICMP.
CAUTION: Th e loss of o ne disk caus es n o serious conseq uences on t he ICMP. But action must be taken
quickly because the loss of a seco nd disk will make t he R AID system broken. The m ain cause of the total loss
of RAID is due in most cases to the loss of the second disk wh ile t
he first has not been rebuilt!
A failed drive should be replaced as so on as possible.
About “RAI D recovery” process
The restoration from degraded to normal condition of the RA ID 5 system is done automatically. Whe n the RAID controller detects a
new HDD to replace the failed disk the recovery procedure starts automatically.
CAUTION: The automatic process does not work if more than one disk is lost. In that case the RAID must be
completely initialized again!
About RAID broken
When more than one HDD is out of order, the RA ID is considered as ’broken’ and th e content is lost. The failed H DDs m ust be
changed and a n ew RAID must be created.
Exchange or re-use of a disk set
It’s possible to h ave s everal sets of di
sks with on e ICMP or to reuse a complete set of disks coming from another projector with
ICMP.Itissufficient to insert the three HDDs, from a valid RAID array, and let the system explore the new RAID. The m ounting ord er
of the HDDs and the HDD slots do not matter. Of course, when using HDDs from an other ICMP it is necessary to retrieve from the
content distributor the KDMs corre
sponding to the content and the new ICMP.
HDD storage capacity
Make sure that all HDD s in the ICMP HDD set have the sam e storage capacity. See label on top of the HDD to know the storage
capacity.
HDD storage
The m aximum recom mended storage period for the drive in a non-o perational environm ent is 90 days. Drives should be stored in t he
original unopen ed shipping pac kaging wheneve r possible. O nce the dr ive is remove d from the o riginal pack aging the recom me nded
maximum p eriod between drive operation cycles is 30 days. During any storage period the dr ive non-operational temperature,
humidity, w et bulb, atmo spheric c onditions, shock, v ibration, magnetic and electrical field spec ifications should be followed.
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R5906693 DP2K-E SERIES 19/06/2015
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