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Chapter 5
First-Time Configuration
5-29
Note –
You might not be able to use all disks for data when using 36 146-Gbyte
disks. Any remaining disks can be used as spares.
5.5.7
Reviewing Default Logical Drives and RAID
Levels
A logical drive is a set of drives grouped together to operate under a particular
RAID level. Each RAID array is capable of supporting as many as eight logical
drives.
A drive can be assigned as the local spare drive to one specified logical drive, or as a
global spare drive that is available to all logical drives on the RAID array.
Spares can be part of an automatic array rebuild.
Note –
A spare is not available for logical drives with no data redundancy (RAID 0).
The logical drives can have the same or different RAID levels.
■
A logical drive can be further divided into a maximum of 128 partitions.
■
In loop mode, the maximum number of partitions is 1024 partitions per RAID
array. To create a maximum of 1024 partitions, see
(Optional, Loop Mode Only)” on page 5-47
■
In point-to-point mode, the maximum number of partitions is 64 partitions in a
redundant configuration.
For a 12-drive array, the RAID array is preconfigured as follows:
■
Two RAID 5 logical drives, consisting of five physical drives in each logical drive
■
Two global spares
TABLE 5-6
Maximum Usable Capacity (Gbyte) per Logical Drive for a 2U Array
Disk Capacity
RAID 5
Random
RAID 5
Sequential
RAID 3
Random
RAID 3
Sequential
RAID 1
Random
RAID 1
Sequential
RAID 0
Random
RAID 0
Sequential
36.2
471
1086
471
1086
507
543
507
1122
73.4
440
1982
440
1982
440
1101
440
1982
146.8
440
1908
440
1908
440
1908
440
1908
Содержание StorEdge 3000 Series
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