Copyright © 2013 NetApp, Inc. All rights reserved.
DS4243 and DS4246 Disk Shelf Overview
Drive
Bays
0-3
4-7
8-11
12-15
16-19
20-23
Left mounting flange
Right mounting flange
0
3
7
11
15
19
23
4
8
12
16
20
DS4243
Shelf LEDs:
- power
- shelf fault
- activity
Shelf ID
digital
display
window
Left ear cover
Disk drive bay numbering 0-23
Right ear cover
Tab for changing the shelf ID
Operator display panel
Up to 24 disk drives
(See the
Hardware Universe
for supported disk drives)
Front view
SLOT
MAP
PSU 1
PSU 3
PSU 2
PSU 4
SBB A
SBB B
Slot A
Slot B
IOM3
IOM3
IOM3
IOM3
LNK
LNK
LNK
LNK
ACP ports
SAS ports
2 I/O blanks
2 or 4 power supplies (each
with two integrated fans)
2 I/O modules (IOMs)
Rear view
Note:
Disk shelves with
two power supplies
occupy the PSU 1 and
PSU 4 locations, as
shown in the following
slot map label.
Note:
The ACP and
SAS ports on the
IOMs are designated
as circle and square
ports.
IOM fault LED
Power supply LEDs:
power
DC fault
fan fault
AC fault
Note:
DS4243 shelves
ship with two or four
power supplies,
depending on the type
of disk drives.
Alternate Control Path (ACP) capability
For maximum storage availability and stability, storage systems with disk shelves have
the option to use the ACP capability. ACP is a protocol that enables Data ONTAP
®
to
manage and control the disk shelf storage subsystem. It uses a separate network from
the data path so that it can independently perform recovery whenever certain
interruptions are detected in the data path.
To use the ACP capability, you must cable the ACP ports on the disk shelves and connect
the disk shelves to the dedicated network interface on each storage system controller. At
system setup, you enable ACP functionality by configuring ACP parameters. If your
storage system does not have a dedicated onboard network interface for ACP, you assign
one at system setup.
Standard ACP cabling rules apply to all storage systems and can be found in the
Univer-
sal SAS and ACP Cabling Guide
. ACP functionality, configuration, and enabling informa-
tion can be found in the
Data ONTAP Storage Management Guide
.
Note:
If at initial storage system setup you choose not to use the ACP capability, you can
use it later by cabling the ACP connections and enabling ACP by running setup again.
Component replacement map
Front
Up to 24
disk drives
Power supplies and disk drives are hot-swappable.
(Replace the power supply within two minutes of removal to
minimize disruption to the disk shelf’s airflow.)
Shelf IOMs are not hot-swappable in storage systems that
are single-controller single-path configurations.
For component replacement instructions, LED behavior, and SES
error messages, see the
DS4243, DS2246, DS4486, and
DS4246 Installation and Service Guide
.
Back
Two or four
power supplies
Two IOMs
Note:
New DS4243 and DS4246 disk shelves are visually distinguished by the following labeling:
The disk shelf model, DS4243 or DS4246, appears on the front right ear cover of the disk shelf.
IOM3 appears on the IOM face for DS4243 disk shelves. IOM6 appears on the face of the IOM
for DS4246 disk shelves.
Two-digit shelf ID digital display
Mixing IOM3 and IOM6 in the same disk shelf is not supported.
The illustrations in this document show a DS4243 disk shelf.
Hot-adding disk shelves
If you are hot-adding disk shelves to an existing storage system, see the applicable document
for the system requirements and procedure:
These documents can be found on the NetApp Support Site at
support.netapp.com.
For storage systems, see the
DS4243, DS2246, DS4486, and DS4246 Disk Shelf Installa-
tion and Service Guide
.
For MetroCluster systems using SAS optical cables, see
Configuring a stretch MetroCluster
system with SAS disk shelves and SAS optical cables
.
For MetroCluster systems using FibreBridge 6500N bridges, see
Configuring a MetroCluster
system with SAS disk shelves and FibreBridge 6500N bridges
.
210-04675+E0
