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Creation and Change Attribute for RAID-5 Arrays Only
You can specify the following attribute with the
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ssaraid command with the
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fw_max_length (default=128 x (n-1), where n is the number of member disk drives in
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the array)
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strip_size (default=64)
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Creation and Change Attribute for RAID-10 Arrays Only
You can specify the following attribute with the
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ssaraid command with the
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strip_size (default=32)
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RAID Arrays Change Attributes
This section describes the creation and change attributes that you can use for:
v All RAID arrays
v Hot spare disk drives only
v Array member disk drives only
Change Attributes for All RAID Arrays
You can specify the following attributes with the
ssaraid command with the
use=system/free
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User's Guide and Maintenance Information
option to create a RAID-5 array:
This attribute sets the maximum size, in blocks, of write operations to the
cache. Write operations that are larger than the specified value write data
directly to the array, and do not use the fast-write cache.
Note: You can set the maximum length to be less than, but not greater than,
the default length. Any length that is greater than the default length is
ignored, and the default is used.
This attribute is used only when the array is created. The strip size is the
maximum amount of contiguous data that is mapped to one member disk
drive. Valid values are: 64 (32 KB or 64 x 512 byte blocks) and 128 (64 KB or
128 x 512 byte blocks).
option to create a RAID-10 array:
This attribute is used only when the array is created. The strip size is the
maximum amount of contiguous data that is mapped to one member disk
drive. Valid values are: 32 (16 KB or 32 x 512 byte blocks), 64 (32 KB or 64 x
512 byte blocks), and 128 (64 KB or 128 x 512 byte blocks).
option to change a RAID array:
With the attribute set to system:
The array is made usable by the operating system. If you specify also the
option, a corresponding hdisk device is created for the array.
With the attribute set to free:
The array has no use assigned to it, and the operating system cannot use it as
an hdisk. If you specify the
exists for the array.
option when you are using the
option when you are using the
option only when you are using the
option, you ensure that no corresponding device
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