Copyright © 2013 NetApp, Inc. All rights reserved.
DS4486 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
DS4486
Shelf LEDs:
- power
- shelf fault
- activity
Shelf ID
digital
display
window
Left ear cover
Disk carrier bay numbering
Right ear cover
Button for changing the shelf ID
Operator display panel
24 disk carriers containing two SATA HDDs
Front view
Two-digit shelf ID digital display
IOM6
IOM6
IOM6
IOM6
AC
AC
AC
AC
Four power supplies (each with integrated fans)
Power supply LEDs
PSU OK
DC fault
AC fault
fan fault
AC
IOM fault LED
ACP ports
SAS ports
SAS port link LEDs
Two I/O modules (IOM6)
Rear view
LNK
LNK
LNK
LNK
Note:
The ACP and
SAS ports on the
IOMs are designated
as circle and square
ports.
A
1
2
B
3
4
A
1
2
B
3
4
IOM A and
power supplies
one and two
IOM B and
power supplies
three and four
Component replacement map
Front
Back
Alternate Control Path (ACP) capability
For maximum storage availability and stability, storage systems with SAS disk shelves
have the option to use the ACP capability. ACP is a protocol that enables Data ONTAP
®
to manage and control the DS4486 disk shelf storage subsystem. It uses a separate
network from the data path so 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
Universal SAS and ACP Cabling Guide
. ACP functionality, configuration, and enabling
information 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.
24 disk
carriers
Power supplies and disk carriers are hot-swappable.
(Replace the power supply within two minutes of removal to
minimize disruption to the disk shelf’s airflow.)
IOMs are not hot-swappable in single-controller single-path
configurations.
For component replacement instructions, including shelf replace-
ment, LED behavior, and SES error messages, see the
DS4243,
DS2246, DS4486, and DS4246 Disk Shelf Installation and
Service Guide
.
Two IOMs
Four power
supplies
H1 shelf mode for DS4486 disk shelves
The system initiates the H1 shelf mode automatically when one of the disk drives in a disk
carrier has faulted and data from the good disk drive is being copied to a spare. Do not
remove any faulted disk carrier while the disk shelf is in H1 shelf mode.
For details about how H1 shelf mode works, see the
DS4243, DS2246, DS4486, and
DS4246 Disk Shelf Installation and Service Guide
.
210-05399+B0
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
.
