Note: This procedure follows the best practice of removing disk drive ownership; therefore,
steps are written with the assumption that you have removed disk drive ownership.
For information about removing disk drive ownership in a 7-Mode system, see the "Removing
ownership from a disk" procedure in the
Storage Management Guide for 7-Mode. For
information about removing disk drive ownership in a clustered Data ONTAP system, see the
"Removing ownership from a disk" procedure in the
Clustered Data ONTAP Physical Storage
Management Guide. These documents are available on the NetApp Support Site at
Note: The procedure for removing ownership from disk drives requires you to disable disk
autoassignment. You reenable disk autoassignment when prompted at the end of this shelf
hot-remove procedure.
•
Multipath HA configurations cannot be in a takeover state.
•
If you are removing one or more disk shelves from within a stack, you must have factored the
distance to bypass the disk shelves you are removing. Therefore, if the current cables are not
long enough—including Ethernet cables for the ACP connections—you need to have longer
cables available.
The
Hardware Universe at
contains information about supported SAS cables.
About this task
•
This procedure follows the cabling rules in the
SAS and ACP Cabling Guide for DS4243,
DS2246, DS4486, and DS4246 Disk Shelves; therefore, references to IOMs and IOM SAS and
ACP square and circle ports align with the cabling rules. If your multipath HA or single-
controller-dual-path (multipath) configuration is cabled differently from what is prescribed in
the cabling guide, the IOM and/or IOM ports might be different.
•
Path A refers to the A-side disk shelf I/O module (IOM A) located in the top or left of the disk
shelf depending on your disk shelf model.
•
Path B refers to the B-side disk shelf I/O module (IOM B) located in the bottom or right of the
disk shelf depending on your disk shelf model.
•
The
first disk shelf in the stack is the disk shelf with the SAS square ports directly connected to
the controllers.
•
The
interim disk shelf in the stack is the disk shelf directly connected to other disk shelves in
the stack.
•
The
last disk shelf in the stack is the disk shelf with SAS circle ports directly connected to the
controllers.
•
The
next disk shelf is the disk shelf downstream of the disk shelf being removed, in depth
order.
•
The
previous disk shelf is the disk shelf upstream of the disk shelf being removed, in depth
order.
•
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.
•
If your system uses ACP, ACP connections can be recabled at any time because they are
independent of the data path; however, in this procedure, for simplicity, you recable ACP
connections after you recable the SAS connections.
•
For clustered Data ONTAP configurations, you use clustered Data ONTAP commands and 7-
Mode commands; therefore, you will be entering commands from the clustershell and from the
nodeshell.
DS4243, DS2246, DS4486, and DS4246 Installation and Service Guide
23
Hot-removing disk shelves or stacks in systems running Data ONTAP 8.2.1 or later
