Dell SCv3000 Deployment Guide

iSCSI Settings
This appendix lists recommended and required settings when using iSCSI cards.
Flow Control Settings
This section provides information about ow control and the recommended ow control settings.
Ethernet Flow Control
802.3x ow control is a mechanism for temporarily pausing data transmission when a NIC, an HBA port, or a switch port is transmitting
data faster than its target port can accept the data.
Ethernet ow control allows a switch port to stop network trac between two nodes by sending a PAUSE frame to another switch port or
edge device. The PAUSE frame temporarily pauses transmission until the port is again able to service requests.
Switch Ports and Flow Control
Recommendations for using Ethernet Flow Control depends on the switch port hardware.
• Ethernet Flow Control should be set to ON for switch ports connected to Storage Center storage system card ports.
• Switch port settings for server NICs and other switch ports in the switch network should be set to ON.
Flow Control
Dell recommends the following settings as best practice when enabling ow control:
• A minimum of receive (RX) ow control should be enabled for all switch interfaces used by servers or storage systems for iSCSI trac.
• Symmetric ow control should be enabled for all server interfaces used for iSCSI trac. Storage Center automatically enables this
feature.
NOTE
: To nd best practices for iSCSI SAN switch conguration, go to the Switch Conguration Guides wiki page.
Jumbo Frames and Flow Control
Some switches have limited buer sizes and can support either jumbo frames or ow control, but cannot support both at the same time. If
you must choose between the two features, Dell recommends choosing ow control.
NOTE
: All the switches listed in the Dell EMC Compatibility Matrix for SC, PS, and FS Series Arrays support both jumbo frames
and ow control at the same time.
However, if you use jumbo frames, be aware of the following:
• To simplify troubleshooting initial deployments, make sure that all servers, switches, and storage are fully operational before enabling
jumbo frames.
• All devices connected through iSCSI must support 9K jumbo frames or larger.
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108 iSCSI Settings

Dell SCv3000 Specifications

General

HDD speed	10000 RPM
Storage drive size	3.5 \
Storage drive capacity	900 GB
Storage drive interface	Serial Attached SCSI (SAS)
Storage drives installed	Yes
Installed storage drive type	HDD
Total installed storage capacity	6.3 TB
Maximum supported storage capacity	- TB
Number of storage drives installed	7
Number of storage drives supported	16
USB connectivity	-
Chassis type	Rack (3U)
Product color	Black, Grey
AC input voltage	100-240 V
AC input frequency	50 - 60 Hz
Power supply unit (PSU) capacity	1485 W
Storage temperature (T-T)	-40 - 65 °C
Operating temperature (T-T)	10 - 35 °C
Storage relative humidity (H-H)	5 - 95 %
Operating relative humidity (H-H)	10 - 80 %
Dell E-Value Code	SCv3000FC

Weight and Dimensions

Depth	785 mm
Width	445 mm
Height	133.3 mm