Dell 3 User Manual download pdf (Page 102)

100 Configuring PERC 3

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NOTE: When a ‘delete’

request reaches the

operating system driver,

the driver stops all the

running input/output (I/O)

for other logical drives

and processes the delete

request first. Normal

read/write operation

starts after the delete

request is completed.

After you delete a logical drive, you can create a new one. You can use the

configuration utilities to create the next logical drive from the non-

contiguous free space (‘holes’), and from the newly created arrays. The

configuration utility provides a list of configurable arrays where there is a

space to configure.

NOTICE: The deletion of the logical drive can fail under certain conditions.

You cannot delete a logical drive during a reconstruction. Deletion can fail

during a rebuild, initialization or check consistency of a logical drive, if that

drive has a higher logical drive number than the drive you want to delete.

Configuration Module

The main benefit of random array deletion on the configuration module is

that you are not restricted to sequential or contiguous logical drives when

you create logical drives. You can use non-contiguous segments to create

logical drives.

NOTE: Drive size

expansion is not possible,

even though you can use

non-contiguous free space

to create a new logical

drive.

The random deletion of logical drives creates non-contiguous segments in

the configuration, which prevents the sequential creation of the next logical

drive. You can create logical drives from these non-contiguous segments. To

create such a logical drive, you can span these segments, as long as they have

the same number of physical drives.

NOTE: You cannot move

an existing logical drive

to another area to protect

it from defragmentation

caused by random

deletion.

You can still create sequential logical drives, without using the non-

contiguous segments. The utilities provide information about sequential

segments, non-contiguous segments and physical drives that have not been

configured. You can use this information when you create logical drives.

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