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2.4.6
Reliability
The reliability of the AMS200 is described in the following tables.
The following reliability does not change even when the RKNAS is connected to the system.
Table 2.13
Reliability of AMS200 Rack-Mount Model (RKS/RKAJ)
Item
Reliability
Note: The value of the MTBDL is calculated in the following configuration: RAID 5:68 sp
((15D+1P)(4group+4(spare)). This value varies on user's system configuration.
Model
RKS
MTBDL (Mean
About 20 million hour or longer (in RAID 5 configuration)
Time Between Data
RAID 6 configuration
Lost)
(Note)
n(n−1)(n−2)×Number of Parity group×MTTR
RAID 5 configuration:
n(n−1)×Number of Parity group×MTTR
RAID 0 configuration
RAID 1 or RAID1+0 configuration
n×1×Number of Parity group×MTTR
MTTR: Mean Time To Repair
n: Number of the mounted disk drive/Parity group
Drop in package
No abnormality must be caused by a free drop of level IV.
(JIS Z 0200-1997)
Radio frequency
radiation
Instantaneous
10 ms (100% dip)
power failure
Rack-Mount Model
RKAJ
3
(MTBF of the disk drive)
2
(MTBF of the disk drive)
MTBF of the disk drive
n×Number of Parity group
2
(MTBF of the disk drive)
Acer | HDS AMS200 User and Reference Guide
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