How Are Disk Drives Identified In Sas; What Are The Sas Connection Options; Direct-Attach Connections; Backplane Connections - Adaptec 3405 Installation And User Manual

How are Disk Drives Identified in SAS?

In the BIOS and in the management utilities (see
drives are identified in the following formats:
CNX:DevY = Device Y is attached to Connector X (see
●
more information)
BoxX:SlotX = Enclosure X is attached to a disk drive in Slot X (see
●
below for more information)
ExpX:PhyX = Expander X is attached to Phy X (see
●
more information)
where X is the count number.
Note:
Devices other than disk drives (CDROM, tape drives, etc...) are listed in order after your
system disk drives.
In parallel SCSI, XX is the disk drive's channel number, YY is the target number, and ZZ is the
logical unit number (LUN).

What are the SAS Connection Options?

You can connect end devices to each other through direct cable connections and through
backplane connections. When you use one or more expander devices (see
create large configurations.

Direct-attach Connections

In a direct-attach connection, SAS or SATA disk drives are connected directly to a SAS card
with SAS or mini-SAS cables. One disk drive is attached to one SAS/mini-SAS connector with
one SAS/mini-SAS cable (or multiple disk drives are attached to one SAS/mini-SAS connector
with one fan-out cable). The figure on
The number of direct-attached disk drives is limited to the number of phys supported by the
SAS card. (Note that there may be multiple phys within a single connector. See

Backplane Connections

In a backplane connection, disk drives and SAS cards are attached to and communicate with
each other through a system backplane.
There are two types of backplane connections, passive and active. When connecting to either
backplane, it's important to properly connect your disk drive LEDs in order to identify disk
drive conditions. See
LED connections and locations.
Once you have connected to a backplane, use Adaptec Storage Manager to manage your disk
drives. For more information, refer to the Adaptec Storage Manager User's Guide on the
Adaptec Storage Manager Installation CD.
.The number of end devices is limited to the number of slots available on the backplane. For
example, the Adaptec S50 enclosure, which contains an expander, is a backplane connection
that supports up to 12 SAS or SATA disk drives.
page 47 shows an example of direct-attach connections.
About Your RAID Controller on page 17
Appendix A: Introduction to SAS
Identifying Disk Drives on page
Direct-attach Connections
Backplane Connections
SAS Expander Connections
page
for your RAID controller Activity
79
●
100), disk
below for
below for
80), you can
page 80.)