NetApp DS4243 User Manual

• If you are installing DS4486 disk shelves, you must have read and understood the Rules for
handling disk carriers for DS4486 disk shelves section to prevent damage to the disk drives in
the disk carriers.
About this task
• Nondisruptive stack consolidation is not supported.
You cannot use this procedure to hot-add disk shelves that were hot-removed from another
stack in the same system when the system is powered on and serving data (I/O is in progress).
• The best practice is to have the current version of the Disk Qualification Package (DQP)
installed before hot-adding a disk shelf.
Having the current version of the DQP installed allows your system to recognize and utilize
newly qualified disk drives; therefore, avoiding system event messages about having non-
current disk drive information. You also avoid the possible prevention of disk partitioning
because disk drives are not recognized. The DQP also notifies you of non-current disk drive
firmware.
NetApp Downloads: Disk Qualification Package
• You can use longer cables to connect the hot-added shelf, if needed.
This is a cable replacement and can be done as the first step when performing the "Cabling the
hot-added disk shelf" procedure.
• Alternate Control Path (ACP) is supported up to 100 meters (per Ethernet standard).
You use CAT6 Ethernet cables, which can be non-NetApp cables.
• If you are hot-adding a disk shelf to an existing stack, this procedure is written for hot-adding
the disk shelf to the logical last disk shelf of the stack.
• If you are hot-adding more than one disk shelf, you hot-add one at a time.
• If you are installing the disk shelf in an equipment rack or NetApp cabinet, you must install the
two-post telco tray kit or four-post rail kit that came with your disk shelf.
• Wait at least 10 seconds before connecting the port. The SAS cable connectors are keyed;
when oriented correctly into a SAS port, the connector clicks into place and the disk shelf SAS
port LNK LED illuminates green.
For disk shelves, you insert a SAS cable connector with the pull tab oriented down (on the
underside of the connector).
• Disk shelves do not need to be grounded; grounding is done through the power cords.
• To prevent degraded performance, do not twist, fold, pinch, or step on the cables.
Cables have a minimum bend radius. Cable manufacturer specifications define the minimum
bend radius; however, a general guideline for minimum bend radius is 10 times the cable
diameter.
• Using Velcro wraps instead of tie-wraps to bundle and secure system cables allows for easier
cable adjustments.
• The SAS cables can be SAS copper, SAS optical, or a mix.
If you are using a mix of SAS copper cables and SAS optical cables, the following rules apply:
◦ Shelf-to-shelf connections in a stack must be all SAS copper cables or all SAS optical
cables.
◦ If the shelf-to-shelf connections are SAS optical cables, the controller-to-stack connections
to that stack must also be SAS optical cables.
◦ If the shelf-to-shelf connections are SAS copper cables, the controller-to-stack connections
to that stack can be SAS optical cables or SAS copper cables.
• SAS optical multimode QSFP-to-QSFP cables can be used for controller-to-stack and shelf-to-
shelf connections, and are available in lengths up to 50 meters.
• If you are using SAS optical multimode MPO cables with MPO QSFP modules, the following
rules apply:
DS4243, DS2246, DS4486, and DS4246 Installation and Service Guide 12
Hot-adding a SAS disk shelf

NetApp DS4243 Specifications

General

Brand	NetApp
Model	DS4243
Category	Storage
Language	English