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Configuration Functions
007-4382-002
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The maximum number of packs that can be combined into a LUN is four for
controllers with 6.14 firmware.
•
The maximum number of packs that can be combined into a LUN is 16 for
controllers with 7.01 and later firmware.
•
1 to 8 disk drives can be combined into a pack for controllers with 6.14 firmware.
•
1 to 16 disk drives can be combined into a pack for controllers with 7.01 and later
firmware.
•
The number of drives in a pack determines the possible RAID levels.
•
If spanning packs into a LUN, all packs must have the same number of disks.
•
Any drive of any size may be used in a pack, but the amount of usable storage will
be computed as the smallest disk times the number of drives in the pack.
Creating and Defining New LUNs
System drives are the logical devices (storage volumes) that are presented to the
operating system. During the configuration process, after physical disk drive packs are
defined, one or more system drives must be created from the drive packs. System drives
have the following properties:
•
More than one system drive can be defined on a single drive pack. Or, a system
drive can span 4 (firmware below 7.01 or 16 (firmware greater than 7.01) packs.
•
The minimum size of a system drive is 8 MB. The maximum size is 2 TB (see the
note on next page)
•
Up to 8 (firmware below 7.01) or 32 (firmware greater than 7.01) system drives can
be created.
•
Each system drive has a RAID level which is selectable (subject to the number of
disk drives in the system drive’s pack).
•
Each system drive has its own write policy (write-back or write-through).
•
Each system drive has its own affinity or LUN mapping.
Note:
SGI does not support Spanning or MORE operations on the IRIX and Linux
operating systems. See “Expand LUN” on page 62 for more information on MORE
operations.
Summary of Contents for TP9100
Page 1: ...TPM Installation Instructions and User s Guide for TP9100 007 4382 002 ...
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Page 60: ...44 007 4382 002 3 Using TPM Figure 3 10 All Drive Packs Created 7 01 and Later Firmware ...
Page 65: ...Configuration Functions 007 4382 002 49 Figure 3 15 All LUNs Defined 6 14 Firmware ...
Page 87: ...Configuration Functions 007 4382 002 71 Figure 3 40 Initialization Progress 6 14 Firmware ...
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