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2 integrated striping, Integrated striping – Avago Technologies LSI20320 User Manual

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Fusion-MPT Special Features

29

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Note that the IDs of the first and second member are no longer
presented to the system. Note also that you must give a volume ID that
does not conflict with an ID that remains on the bus after the volume is
created.

ok show-volumes

Volume 0 Enabled Resync In Progress Degraded Mode 71132960 Blocks, 36 GB

Disk 0 Primary

Channel 0 Target 1 SEAGATE ST336737LC 5040

Disk 1 Secondary Out Of Sync

Channel 0 Target 2 SEAGATE ST336737LC 5040

Subsequent show-children commands show only the resultant volume
and the remaining nonmember disks, if any.

ok show-children

MPT Version 1.02, Firmware Version 0.00.09.00

Initiator ID is 7

Volume 0

Unit 0

Disk

LSILOGIC1030 IM

1000

71132960 Blocks, 36 GB

At this point the IM set is created and is in the Re-synchronizing state.
Although the volume is usable at this point, it does not operate at
maximum performance or be redundant until it reaches the Optimal state.

You do not need to wait for the disk to reach the Optimal state at this
point. In fact, the disk will reach the optimal state more quickly under the
operating system driver, after Solaris is booted, because the runtime
driver uses the performance features of the Fusion-MPT architecture.

Check the file

/var/adm/messages

for messages regarding state

changes for the volume set as it progresses from the Re-synchronizing
state to the Optimal state.

5.2

Integrated Striping

Disk striping, also known as RAID 0, pairs two drives together into a
volume set to achieve better performance. Unlike a mirrored volume,
however, a striped volume does not write data to both disks and therefore
does not provide data redundancy if one of the disks fails.

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