Fujitsu PRIMEQUEST 2000 Series Design Manual page 88

3.3.4 HDD Configuration (1/5)
Guidelines for Selecting a RAID Configuration for HDDs
n
Redundancy with "SAN boot + multipath driver" is recommended for reliability.
Item
OS standard
OS
High-speed access Relatively slow
Card duplication
Path duplication
RAID level Depends on the software
Device duplication at
Not supported
boot time
(*1) For details, refer to "3.3.2 Guidelines for Selecting Internal
(*2) For details on the supported OSs or virtualization software, refer to the related documents of the OS or virtualization software.
Notes (1/2)
n
• If an unpredictable power supply problem occurs, data in the cache (*) that is equipped in a
hardware RAID or disk may be lost.
To avoid such a problem, make sure to consider installing a redundant power supply or dual
power feed option as well as a CVCF or UPS.
(*) A hardware RAID uses the cache on the hardware when Write Back or Always Write Back is specified. A
disk uses the cache on the hardware when the disk cache is enabled.
PRIMEQUEST 2000 Series Design Guide
Software RAID
PRIMECLUSTER GDS
(*2) Supported with RHEL
Relatively slow
Supported Supported
Supported Supported
0, 1
Supported
Hardware RAID
Inside of an SB or DU (*1) External hard disk cabinet (JX40)
Supported
Supported
Not supported
Not supported
Available at the RAID levels that are
0, 1, 1E, 5, 6, 10 supported by the SAS array controller card
that is connected to JX40
Supported
Storage".
87
SAN boot + multipath driver
Supported
Supported
Not supported
Not supported
Available at the RAID level of the
storage device being used
Supported
Copyright 2014 FUJITSU LIMITED
Supported
Supported
Supported
Supported
Supported