Parameter
Description
T10PI
The setting to specify that an subsystem, and the logical
drives within the subsystem, has T10 PI (Protection
Information) to help you ensure that the data maintains
its integrity. When you use this parameter, only
protected drives can be used for the subsystem. These
settings are valid:
v
none
—The subsystem does not have T10 PI
(Protection Information).
v
enabled
—The subsystem has T10 PI (Protection
Information). The subsystem support is protected
information and is formatted with protection
information enabled.
Notes
Drives and subsystem
An subsystem is a set of disk drives that are logically grouped together by the controllers in the storage
subsystem. The number of disk drives in an subsystem is a limitation of the RAID level and the
controller firmware. Follow these guidelines when you create an subsystem:
v
Beginning with firmware version 7.10, you can create an empty subsystem to reserve the capacity for
later use.
v
You cannot mix drive types, such as SAS, SATA, and Fibre Channel, within a single subsystem.
v
The maximum number of drives in an subsystem depends on these conditions:
– The type of controller
– The RAID level
v
RAID levels include: 0, 1, 10, 3, 5, and 6.
– In a DS4700 Model 70 or a DS4700 Model 72 storage subsystem, an subsystem with RAID level 0
and an subsystem with RAID level 10 can have a maximum of 112 drives.
– In a DS4800 (Models 82, 84, 88) storage subsystem, an subsystem with RAID level 0 and an
subsystem with RAID level 10 can have a maximum of 224 drives.
– An subsystem with RAID level 3, RAID level 5, or RAID level 6 cannot have more than 30 drives.
– An subsystem with RAID level 6 must have a minimum of five drives.
– If an subsystem with RAID level 1 has four or more drives, the storage management software
automatically converts the subsystem to a RAID level 10, which is RAID level 1 + RAID level 0.
For information about the maximum number of disk drives in a RAID subsystem or disk pool, see
Table 4-2 on page 4-8.
v
If an subsystem contains disk drives that have different capacities, the overall capacity of the
subsystem is based on the smallest capacity drive.
v
To enable enclosure loss protection, you must create an subsystem that uses disk drives located in at
least three drive expansion enclosures.
Disk drives do not report their exact capacity (for example, a 73 GB drive does not report 73 GB as its
capacity).
Hot Spares
Hot spare disk drives can replace any failed disk drive in the storage subsystem. The hot spare must be
the same type of disk drive as the disk drive that failed (that is, a SATA hot spare cannot replace a Fibre
Channel disk drive). A hot spare must have capacity greater than or equal to any disk drive that can fail.
3-44
IBM System Storage DS3000, DS4000, and DS5000: Command Line Interface and Script Commands Programming Guide
Содержание System Storage DS3000
Страница 10: ...x IBM System Storage DS3000 DS4000 and DS5000 Command Line Interface and Script Commands Programming Guide...
Страница 12: ...xii IBM System Storage DS3000 DS4000 and DS5000 Command Line Interface and Script Commands Programming Guide...
Страница 46: ...2 12 IBM System Storage DS3000 DS4000 and DS5000 Command Line Interface and Script Commands Programming Guide...
Страница 382: ...3 336 IBM System Storage DS3000 DS4000 and DS5000 Command Line Interface and Script Commands Programming Guide...
Страница 476: ...7 16 IBM System Storage DS3000 DS4000 and DS5000 Command Line Interface and Script Commands Programming Guide...
Страница 504: ...9 12 IBM System Storage DS3000 DS4000 and DS5000 Command Line Interface and Script Commands Programming Guide...
Страница 512: ...10 8 IBM System Storage DS3000 DS4000 and DS5000 Command Line Interface and Script Commands Programming Guide...
Страница 530: ...11 18 IBM System Storage DS3000 DS4000 and DS5000 Command Line Interface and Script Commands Programming Guide...
Страница 590: ...12 60 IBM System Storage DS3000 DS4000 and DS5000 Command Line Interface and Script Commands Programming Guide...
Страница 594: ...13 4 IBM System Storage DS3000 DS4000 and DS5000 Command Line Interface and Script Commands Programming Guide...
Страница 596: ...14 2 IBM System Storage DS3000 DS4000 and DS5000 Command Line Interface and Script Commands Programming Guide...
Страница 598: ...A 2 IBM System Storage DS3000 DS4000 and DS5000 Command Line Interface and Script Commands Programming Guide...
Страница 599: ...Appendix A Examples of information returned by the show commands A 3...
Страница 600: ...A 4 IBM System Storage DS3000 DS4000 and DS5000 Command Line Interface and Script Commands Programming Guide...
Страница 601: ...Appendix A Examples of information returned by the show commands A 5...
Страница 602: ...A 6 IBM System Storage DS3000 DS4000 and DS5000 Command Line Interface and Script Commands Programming Guide...
Страница 603: ...Appendix A Examples of information returned by the show commands A 7...
Страница 604: ...A 8 IBM System Storage DS3000 DS4000 and DS5000 Command Line Interface and Script Commands Programming Guide...
Страница 605: ...Appendix A Examples of information returned by the show commands A 9...
Страница 606: ...A 10 IBM System Storage DS3000 DS4000 and DS5000 Command Line Interface and Script Commands Programming Guide...
Страница 607: ...Appendix A Examples of information returned by the show commands A 11...
Страница 608: ...A 12 IBM System Storage DS3000 DS4000 and DS5000 Command Line Interface and Script Commands Programming Guide...
Страница 609: ...Appendix A Examples of information returned by the show commands A 13...
Страница 610: ...A 14 IBM System Storage DS3000 DS4000 and DS5000 Command Line Interface and Script Commands Programming Guide...
Страница 611: ...Appendix A Examples of information returned by the show commands A 15...
Страница 623: ...Appendix A Examples of information returned by the show commands A 27...
Страница 624: ...A 28 IBM System Storage DS3000 DS4000 and DS5000 Command Line Interface and Script Commands Programming Guide...
Страница 625: ...Appendix A Examples of information returned by the show commands A 29...
Страница 626: ...A 30 IBM System Storage DS3000 DS4000 and DS5000 Command Line Interface and Script Commands Programming Guide...
Страница 627: ...Appendix A Examples of information returned by the show commands A 31...
Страница 628: ...A 32 IBM System Storage DS3000 DS4000 and DS5000 Command Line Interface and Script Commands Programming Guide...
Страница 632: ...B 4 IBM System Storage DS3000 DS4000 and DS5000 Command Line Interface and Script Commands Programming Guide...
Страница 648: ...F 4 IBM System Storage DS3000 DS4000 and DS5000 Command Line Interface and Script Commands Programming Guide...
Страница 651: ......
Страница 652: ...Part Number 00W1466 Printed in USA GA32 0961 05 1P P N 00W1466...