ATTO Technology Diamond Storage Array VT-Class - Manual (Page 59)

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Configure drives
Advanced CLI configuration page of the
ExpressNAV interface. Zoning supports security
by granting or denying access between initiators
and devices as defined by an administrator.
A zone is a collection of devices which can access
each other. The devices in a zone usually include
one or more initiators, one or more devices, and
one or more paths between the initiators and the
devices.
Interleave
The interleave size sets the amount of data to be
written to each drive in a RAID group. This is a
tunable parameter which takes a single stream of
data and breaks it up to use multiple disks per I/O
interval.
• The default sector interleave in RAID Level 10 is
128 blocks (64k).
• The default sector interleave in RAID Level 5 is
256 blocks (128k).
The CLI command RAIDInterleave allows you to
change the size of the sector interleave between
RAID groups. The value will depend upon the
normal expected file transfer size. If the normal
file transfer size is large, the interleave value
should be large, and vice versa.
The value entered for the RAIDInterleave
command refers to blocks of data: one block is
equivalent to 512 bytes of data.
Valid entries are 16, 32, 64, 128, 256 and SPAN.
SPAN, not available in RAID Level 5, indicates
that interleave size between the drives in the
group will be the minimum drive size of all
members in the group.
Enhancing performance
SpeedWrite, enabled by the CLI command
SpeedWrite , improves the performance of WRITE
commands.