32
Chapter 2 Planning for Installation and Operation
2.4.6
Reliability
The reliability of the WMS100 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 WMS100 Rack-Mount Model
Rack-Mount Model
Item Model
RKXS RKAJAT
MTBDL (Mean
Time Between Data
Lost) (
Note
)
About 5 million hour or longer (in RIAD5 configuration)
RAID 5 configuration:
n(n
−
1)
×
Number of Parity group
×
MTTR
(MTBF of the disk drive)
2
RAID 6 configuration
n(n
−
1)(n
−
2)
×
Number of Parity group
×
MTTR
2
(MTBF of the disk drive)
3
RAID 1 or RAID1+0 configuration
n
×
1
×
Number of Parity group
×
MTTR
(MTBF of the disk drive)
2
MTTR: Mean Time To Repair
n: Number of the mounted disk drive/Parity group
Drop in package
(JIS Z 0200-1997)
No abnormality must be caused by a free drop of level IV.
Radio frequency
radiation
Conforms to FCC Class A
Reliability
Instantaneous
power failure
10 ms (100% dip)
Note:
The value of the MTBDL is calculated in the following configuration: RAID 5:68 sp ((15D+1P)
×
4(spare)).
Therefore, this value varies on user's system configuration.
Summary of Contents for HDS WMS100
Page 1: ...MK 95DF738 01 Acer HDS WMS100 User and Reference Guide ...
Page 2: ......
Page 8: ...viii Preface ...
Page 12: ...xii Preface ...
Page 22: ...xxii Contents ...
Page 56: ...34 Chapter 2 Planning for Installation and Operation ...
Page 64: ...42 Chapter 3 Powering On Off Procedure ...
Page 188: ...166 Chapter 7 Configuring Storage on the Thunder 9530 V Series Subsystem Ð ...
Page 192: ...170 Chapter 7 Configuring Storage on the Thunder 9530 V Series Subsystem ...
Page 213: ...Acer HDS WMS100 User and Reference Guide 191 Figure 8 7 NNC Information Screen ...
Page 252: ...230 Chapter 8 Troubleshooting ...
Page 270: ...248 Appendix B System Parameter Settings List ...
Page 316: ...294 Appendix F List of Storage Capacities Corresponding to RAID Levels and Configurations ...
Page 320: ...298 Appendix G Port Address Mapping Table ...