Editing Solaris 10 System Administration Part I (section)

=== disk naming conventions ===

disk device names identify a series of components that together specify a particular disk device

<insert image of naming convention>

Disk device name format: controller, target, disk (or LUN), fdisk partition, & slice that a particular disk device uses

disk device names represent full name of a slice or fdisk partition

Controller #: identifies host bus adapter (HBA), HBA controls command & data communication between system & disk unit, [system <-HBA-> disk unit], #s are assigned sequentially

Target #: identifies a unique hardware address assigned to SCSI target controller of a disk, tape, or optical drive. IDE & SATA drives typically do not use target #s (some do), Fibre-Channel attached disks may use World Wide Name (WWN) instead of a target #

Disk #: unique identifier for each disk per controller # & target # pair. also known as logical unit number (LUN)

fdisk partition #: number ranging from p0 to p4, number p0 represents whole physical disk, device names that include p# are only found on x86/x64 systems

slice #: a # ranging from s0-s7 on SPARC systems & s0-s15 on x86/x64 systems

==== SCSI disk device names ====

SCSI specification allows multiple disks to one target controller

* In some cases, SCSI disk & target controller are combined into one physical unit
* also known as embedded SCSI configuration
* disk # is always set to d0 with embedded SCSI disks

<insert pic of embedded SCSI & regular configurations>


==== iSCSI disk devices ====

Solaris 10 8/07 release included support for iSCSI target devices

The targets can be disk or tape

systems with dedicated arrays can now export replicated storage with ZFS or UFS

use <code>iscsitadm</code> command to set up & manage iSCSI target devices

use <code>iscsiadm</code> command to identify iSCSI targets, which will discover & use iSCSI target devices