NetApp DS4246 User Manual

Replacing SAS cables in a multipath HA or single-controller-dual-path configuration
You can replace SAS cables nondisruptively in a multipath HA or single-controller-dual-path
(multipath) configuration. Replacing a SAS cable means that you use the same SAS ports; you are
only swapping out the cable.
Before you begin
You must have verified that your system meets the requirements listed in the Replacing SAS
cables section.
About this task
If your non-FAS22xx system is shown as something other than Multi-Path HA or Multi-Path,
you cannot complete this procedure. Your system must meet the procedure prerequisites.
Steps
1.
Verify that your system configuration is correct:
• For a system with Data ONTAP operating in 7-Mode, enter the following command at the
system console:
sysconfig
For multipath HA configurations, you can run this command on either node.
• For clustered systems, enter the following command at the clustershell prompt:
run -node nodename|local sysconfig
It might take up to a minute for the system to complete discovery.
Multi-Path HA or Multi-Path (single-controller-dual-path) is listed in the
System Storage Configuration
field.
Note: For FAS22xx systems with external storage, the output is displayed as Mixed-Path
HA for an HA pair. This is because the internal storage is cabled as single-path HA and the
external storage is cabled as multipath HA.
2. If you are replacing SAS copper cables with SAS optical cables, verify that the disk shelves in
the storage system have the latest version of disk shelf firmware by completing the following
substeps; otherwise, go to Step 4.
a. Enter the applicable command:
• For 7-Mode, enter the following command at the system console:
sasadmin expander_map
For multipath HA configurations, you can run this command on either node.
• For clustered systems, enter the following command at the clustershell prompt:
run -node nodename|local sasadmin expander_map
b. Locate the disk shelf firmware information for the disk shelves in the output.
0151 is the disk shelf firmware version for shelf number one (Slot A/IOM A) in the storage
system:
Expanders on channel 4a:
Level 3: WWN 500a0980000840ff, ID 1, Serial Number ' SHU0954292G114C', Product
'DS424IOM6 ', Rev '0151', Slot A
c. Compare the firmware information in the command output with the disk shelf firmware
information at
NetApp Downloads: Disk Shelf Firmware to determine the most current disk
shelf firmware version.
3. The next step depends on how current the disk shelf firmware is on your disk shelves.
DS4243, DS2246, DS4486, and DS4246 Installation and Service Guide 49
Replacing disk shelf components

NetApp DS4246 Specifications

General

Data transfer rate	6 Gbit/s
Storage drive size	3.5 \
Storage drive interface	Serial Attached SCSI (SAS)
Storage drives installed	Yes
Installed storage drive type	HDD
Supported storage drive types	HDD & SSD
Total installed storage capacity	40.8 TB
Maximum supported storage capacity	- TB
Number of storage drives installed	24
Chassis type	Rack (4U)
Product color	Black
Device class	Large Enterprise Business
AC input voltage	100-240 V
AC input frequency	50 - 60 Hz
Number of power supply units	2
Operating altitude	0 - 3045 m
Non-operating altitude	-305 - 12192 m
Storage temperature (T-T)	-40 - 70 °C
Operating temperature (T-T)	10 - 40 °C
Storage relative humidity (H-H)	10 - 95 %
Operating relative humidity (H-H)	20 - 80 %

Weight and Dimensions

Depth	610 mm
Width	483 mm
Height	178 mm