9. ICMP
9.2 ICMP H DD
About ICMP HDD
The three HDDs (local storage) in the ICMP, are set up in a RAID 5 configuration. This storage technique, that combines m ultiple
HDD com ponents into a logical unit, mana ges enough redundancy information to continue to operate properly after the loss of one
HDD.
Image 9-5
CAUTION: A RAID 5 configuration with three HDDs allows a maximum loss of one disk. With the si
multaneous
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 HD Ds!
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: The loss of one disk caus es no serious co nseque nces on t he ICMP. But action mu st be taken
quickly because the loss of a seco nd disk will make the RAID system broken. T he main cause o f the total lo ss
of RAID is due in most cases to the loss of the second disk while t
he first has not been rebuilt!
A failed drive should be replaced as soon as possible.
About “RAID recovery” process
The restoration from degraded to normal condition of the RAID 5 system is done autom atically. W hen the RA ID controller detects a
new HDD to replace the failed disk the recovery procedure starts automatically.
CAUTION: The au tomatic process d oes not wo rk if more than one d isk is lost. In that case the RAID m ust be
completely initialized again!
About RAI D broken
When more than one HDD is ou t of order, the RAID is considered as ’broken’ and the content is lost. The failed H DDs m ust be
changed and a new RA ID must be created.
Exchange or re-use of a disk set
It’s possible to h ave s everal sets of di
sks with one ICM P or to reuse a c omplete set of disks coming from another projector with
ICMP.Itissufficient to insert the three H DDs, from a valid R AID array, and let the system explore the new RAID. The mounting order
of the HDDs and the HDD slots do not m atter. O f 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 HDDs in the ICMP HDD set have the same 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 the
original unopen ed shipping pac kaging wheneve r possible. Once the dr ive is remove d from the o riginal pack aging the recom me nded
maximum period between drive opera tion cycles is 30 days. During any storage period the drive non-operational temperature,
humidity, w et bulb, atmospheric conditions, shock, v ibration, magnetic and electrical field specifications should be followed.
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