Infortrend
2-4
Table 2 - 1
RAID Levels
RAID Level
Description
Capacity Data Availability
NRAID
Non-RAID
N
N/A
RAID 0
Disk Striping
N
==NRAID
RAID 1 (0+1) Mirroring Plus Striping (if N>1)
N/2
>>NRAID
==RAID 5
RAID 3
Striping with Parity on
dedicated disk
N-1
>>NRAID
==RAID 5
RAID 5
Striping with interspersed
parity
N-1
>>NRAID
==RAID 5
Logical
Volume
Striping one or more logical
drives of different RAID levels
*
Higher; depends
on its members
RAID Level
Performance Sequential
Performance Random
NRAID
Drive
Drive
RAID 0
R: Highest
W: Highest
R: High
W: Highest
RAID 1 (0+1)
R: High
W: Medium
R: Medium
W: Low
RAID 3
R: High
W: Medium
R: Medium
W: Low
RAID 5
R: High
W: Medium
R: High
W: Low
Logical Volume
Depends on its members;
see above
Depends on its members
8. Any spare drives?
(Swap Drive Rebuild / Spare Drive Rebuild)
Spare drives allow for the unattended rebuilding of a failed
drive, heightening the degree of fault tolerance. If there is no
spare drive, data rebuild has to be manually initiated by
replacing a failed drive with a healthy one.
As is often ignored, a spare drive (whether dedicated or global)
must have a capacity no smaller than the members of a logical
drive.
9. Limitations?
Firmware 3.31 and above support 64-bit LBA. A maximum of
64TB capacity can be included in single logical drive.
Up to 128 members can be included in each logical drive.
Extreme array sizes can cause operational problems with
system backup and should be avoided.
Содержание External RAID Controller & Subsystem Infortrend
Страница 231: ...Infortrend 10 18 operating in write back mode it is recommended to install a battery module to each controller...
Страница 249: ...Infortrend 11 2 LN SB FL NAME Disk reserved space Partition Information LG Partition Size MB LG Partition Size MB...
Страница 276: ...Array Expansion 12 17 Drive E now has a capacity of about 25GB...
Страница 327: ...Event Messages D 27...