Specifications

3
Configuring a Redundant Disk Array
16
Figure 3. Connections between hard disk drives on two ATCA-5400 RTMs or to a hard disk drive array
Enabling the secondary RTM SAS ports for RTM RAID
ThisproceduredescribeshowtoenablethesecondarySASportsonanATCA‐5400RTMsoan
RTM‐to‐RTMRAIDconnectioncanbeconfiguredusingacustomSAScable.
Installing a hard disk drive
ToconfigureRAIDbetweentwoRTMs,aSASharddiskdrivemustbeinstalledinbothRTMsso
thesecondaryportswillfunction.ASASdriveisdual‐portedandcanbeaccessedbymore
thanonecontroller,whileaSATAdriveissingle‐ported.
FollowthestepsinInstallingaharddiskdriveonpage11,butdonotperformthefinal
procedureUpdatingthedriveinformationrecordonpage13.Instead,performthefollowing
proceduretoenabletheSASportsaspartofthedriveupdateprocess.
Cabled Link
PCB Traces
Custom SAS
Crossover
Standard SAS
Cable
External hard disk
drive array enclosure
ATCA-45xx CPM
ATCA-5400 RTM
HDD AMC
Port 2
SAS/SATA
controller
Port 1
SAS/SATA
driver
Port 3
0
1
Port 2
Port 0
Port 1
01
0
1
SAS 1
0
1
01
0
1
0
1
01
0
1
Drive enumeration order:
1) Local RTM hard disk drive
2
)
Local AMC hard disk drive
3
)
Upper SAS connector
4
)
Lower SAS connector
Cabled Link
PCB Traces
Port 3
Port 2
Port 0
Port 3
Port 3
Port 2
Port 0
Port 1
Hard disk
drive
SAS 2
SAS 1
SAS 2
Port 2
Port 0
Port 3
Port 1
Port 2
Port 3
SAS/SATA
controller
SAS/SATA
driver
ATCA-45xx CPM
ATCA-5400 RTM HDD AMC
ATCA-45xx CPM
HDD AMC
Port 2
Port 3
Port 1
Port 2
Port 0
Port 3
SAS/SATA
controller
SAS/SATA
driver
Port 3
Port 2
Port 0
Port 1
SAS 1
SAS 2
ATCA-5400 RTM
Drive enumeration order
:
1) Local RTM hard disk drive
2
)
Local AMC hard disk drive
3
)
Upper SAS connector
4
)
Lower SAS connector
Hard disk
drive
Hard disk
drive