7. ICMP
7.2 ICMP HDD
About IC MP HDD
The three HDDs (local storage) in the ICMP, are s et up in a RA ID 5 configuration. This storage technique, that combines m ultiple
HDD components into a logical unit, manages enough redundancy information to continue to operate properly after the loss of one
HDD.
Image 7-4
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 a fter replacement
of the d efect HDDs with 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 causes no serious conseq uences on the ICMP. B ut action must be taken
quickly because the loss of a secon d disk w ill make the RAID system broken. The main cau se o f t he total loss
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 nor mal condition of the RAID 5 system is done autom atically. W he 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 mo re than one disk is lost. In that case the RAID mu st be
completely initialized again!
About RAID destruction
When more than one HDD is ou t of order, the RAID is considered as ’broken’ and the content is lost. T he failed H DDs must be
changed and a n ew RA ID m ust be cr eated.
Exchange or re-use of a disk set
It’s possible to have several s ets 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 H DDs, from a valid RAID array, and let the system explore the new RAID. The mounting order
of the HDDs and the HDD slots do not matter. O f course, when using HDDs from another ICMP it is necessary to retrieve from the
content distributor the KDMs corre
sponding to the content and the new ICMP.
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 drive is remove d from the o riginal packaging the recomme nded
maximum period between drive operation cycles is 30 day s. During any s torage period the dr ive non-operational temperature,
humidity, wet bulb, atmospheric c onditions, shock, vibration, magnetic and electrical field specifications should be followed.
R5905963 PROMETHEUS SERIES 09/03/2015
107
To Next Page
Loading...
Need help?
General
