Logical Drives (Luns) - HP Surestore Disk Array 12h - And FC60 Service Manual
Hp surestore e disk array 12h user's and service manual (c5445-90901, september 1999)
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Also See for Surestore Disk Array 12h - And FC60:
- Service manual (746 pages) ,
- Advanced user's manual (466 pages) ,
- User manual (310 pages)
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Concepts and Management
Disk Array Features
Logical Drives (LUNs)
The entire capacity of the array is divided into entities called logical drives or LUNs. The host operating
system treats each disk array logical drive as an individual disk, subdividing it again if necessary into
partitions. The disk array can be divided into up to eight logical drives.
To maintain data redundancy and improve performance, the data in each logical drive is distributed across
all disks in the array. Consequently, there is no correlation between a logical drive and a specific physical
disk—each logical drive encompasses all disks. This is particularly important to remember when adding a
disk and creating a logical drive to use the new capacity. The new logical drive you create is not confined
to the new disk; like all the other logical drives, it is distributed across all the disks in the array.
Figure 21. Logical Drives
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Troubleshooting
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