NetApp DS4246 User Manual

2. Verify that your system meets the requirements listed in the Replacing SAS cables section.
3. 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 5 on page 51.
a. Enter the following command:
sasadmin expander_map
For clustered systems, you must run this command from the nodeshell.
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.
4.
The next step depends on how current the disk shelf firmware is on your disk shelves.
If the firmware version in the
command output is...
Then...
The same as the most current
version on the NetApp Support
Site
Complete Step 5 through Step 7.
No disk shelf firmware update is needed.
An earlier version than the most
current version on the NetApp
Support Site
Complete Step 5 through Step 8.
You need to update the disk shelf firmware.
5. Enter the applicable command from the system console to perform a clean shutdown:
For...
Then issue this command...
7-Mode halt
Clustered systems halt local
6. Replace any SAS cables.
If you are replacing more than one SAS cable, replace them one at a time to avoid confusion.
Note: 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). For
controllers, the orientation of SAS ports can vary depending on the platform model;
therefore, the correct orientation of the SAS cable connector varies.
7. Verify that you have correctly replaced the cables by bringing your system back up.
a. Boot the system.
b. Enter the following command at the system console:
sysconfig
For clustered systems, you must run this command from the nodeshell.
The output should be the same as Step 1; The system should be Single-Path or Mixed-
Path, and the SAS port and attached disk-shelf information should be the same.
DS4243, DS2246, DS4486, and DS4246 Installation and Service Guide 51
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